Will Meghan Markle go on Kate Middleton's strict wedding diet?

To prepare for her 2011 marriage to Prince William, Kate Middleton reportedly adhered to a strict diet plan to get in tip-top shape for the wedding of the century.

Reports reveal that the bride was "obsessed" with a popular diet called the "Dukan diet," -- though the Duchess never confirmed if she abided by the meal plan. With another royal wedding on the horizon, many are wondering if Meghan Markle might follow in Kate's footsteps. 

The Dukan diet was created by French doctor and nutritionist Pierre Dukan over thirty years ago, but it started gaining traction in 2011. Like the popular keto diet, it is low carb and involves four phases: two for weight loss, and two for maintenance. Said experts to The Express, "It starts by calculating your 'true' weight, based on your age, weight loss history and other factors."

Related: Meghan's style transformation

93 PHOTOS
Meghan Markle's style transformation
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Meghan Markle's style transformation

Meghan Markle attends COACH Legacy Photo Exhibit by REED KRAKOFF at Coach on August 26, 2006 in East Hampton, NY.

(Photo by Billy Farrell/Patrick McMullan via Getty Images)

Meghan Markle during Kari Feinstein Pre-Emmy Style Lounge - Day Two in Los Angeles, California, United States.

(Photo by Jean-Paul Aussenard/WireImage)

DEAL OR NO DEAL Season 2 Pictured: Meghan Markle

(Photo by Paul Drinkwater/NBC/NBCU Photo Bank)

DEAL OR NO DEAL Season 2 Pictured: Meghan Markle

(Photo by Paul Drinkwater/NBC/NBCU Photo Bank)

Meghan Markle during George Lopez/Great Chefs of LA Event For The National Kidney Foundation at The Ritz-Carlton Marina del Rey in Marina del Rey, California, United States. (Photo by Rebecca Sapp/WireImage for Ink PR Group)
Meghan Markle at ABS/Allen Schwartz (Photo by Amy Tierney/WireImage for Primary Action) 
Meghan Markle at ABS/Allen Schwartz during Primary Action 2007 Golden Globe Suites - Day 3 at Private Residence in Los Angeles, California, United States. (Photo by Amy Tierney/WireImage for Primary Action)
BEVERLY HILLS, CA - SEPTEMBER 18: Actress Meghan Markle attends the DPA pre-Emmy Gift Lounge at the Peninsula Hotel on September 18, 2009 in Beverly Hills, California. (Photo by Amanda Edwards/Getty Images)
LOS ANGELES, CA - AUGUST 26: Actress Meghan Markle attends the Some Kind-a Gorgeous Style and Beauty Lounge at the Chateau Marmont on August 26, 2010 in Los Angeles, California. (Photo by Charley Gallay/Getty Images For Benefit Cosmetics)
SUITS -- Season 1 -- Pictured: Meghan Markle as Rachel Zane -- (Photo by: Frank Ockenfels/USA/NBCU Photo Bank via Getty Images)
SUITS -- 'Errors and Omissions' Episode103 -- Pictured: Meghan Markle as Rachel Zane (Photo by Christos Kalohoridis/NBC/NBCU Photo Bank via Getty Images)
USA NETWORKS EVENTS -- 'NBCUniversal Press Tour August 2011 USA Network Breakfast and BTS E - Rotation at the Beverly Hills Hilton Hotel' -- Pictured: (l-r) Rick Hoffman, Meghan Markle (Photo by Evans Vestal Ward/NBC/NBCU Photo Bank via Getty Images)
LOS ANGELES, CA - SEPTEMBER 21: Actress Meghan Markle attends Madewell, Alexa Chung & InStyle celebrate the launch of The Alexa Chung For Madewell Fall 2011 Collection at Chateau Marmont on September 21, 2011 in Los Angeles, California. (Photo by Charley Gallay/WireImage)
BEVERLY HILLS, CA - OCTOBER 11: Meghan Markle arrives at the Anti-Defamation League Entertainment Industry Awards dinner held at The Beverly Hilton hotel on October 11, 2011 in Beverly Hills, California. (Photo by Michael Tran/FilmMagic)
BEVERLY HILLS, CA - JANUARY 14: Actress Meghan Markle attends the HBO Luxury Lounge Featuring L?Oreal Paris And New Era Cap - Day 1 at Four Seasons Hotel Los Angeles on January 14, 2012 in Beverly Hills, California. (Photo by Joe Scarnici/WireImage)
BEVERLY HILLS, CA - JANUARY 14: Actress Meghan Markle attends the HBO Luxury Lounge Featuring L?Oreal Paris And New Era Cap - Day 1 at Four Seasons Hotel Los Angeles on January 14, 2012 in Beverly Hills, California. (Photo by Michael Kovac/WireImage)
BEVERLY HILLS, CA - JANUARY 15: Actress Meghan Markle arrives at the 13th Annual Warner Bros. And InStyle Golden Globe After Party held at The Beverly Hilton hotel on January 15, 2012 in Beverly Hills, California. (Photo by Jon Kopaloff/FilmMagic)
WEST HOLLYWOOD, CA - FEBRUARY 15: Actress Meghan Markle attends the USA Network's and The Moth's Storytelling Tour 'A More Perfect Union: Stories of Prejudice and Power' at the Pacific Design Center on February 15, 2012 in West Hollywood, California. (Photo by Frederick M. Brown/Getty Images)
SUITS -- Season: 2 -- Pictured: Meghan Markle as Rachel Zane -- (Photo by: Robert Ascroft/USA Network/NBCU Photo Bank via Getty Images)
NEW YORK, NY - MAY 17: Meghan Markle attends the USA Network's 2012 Upfront Event at Alice Tully Hall on May 17, 2012 in New York City. (Photo by D Dipasupil/FilmMagic)
NEW YORK, NY - JUNE 12: Meghan Markle of Suits attends USA Network and Mr Porter.com Present 'A Suits Story' on June 12, 2012 in New York, United States. (Photo by Theo Wargo/Getty Images for NBCUniversal/USA Network)
TORONTO, ON - SEPTEMBER 11: Actress Meghan Markle attends the WGC Hosts Party With InStyle & HFPA To Celebrate TIFF at the Windsor Arms Hotel on September 11, 2012 in Toronto, Canada. (Photo by Joe Scarnici/Getty Images for WGC)
WEST HOLLYWOOD, CA - NOVEMBER 12: Actress Meghan Markle attends TV Guide Magazine's 2012 Hot List Party at SkyBar at the Mondrian Los Angeles on November 12, 2012 in West Hollywood, California. (Photo by David Livingston/Getty Images)
LOS ANGELES, CA - NOVEMBER 13: Actress Meghan Markle arrives at the GQ Men of the Year Party at Chateau Marmont on November 13, 2012 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)
BEVERLY HILLS, CA - JANUARY 13: Actress Meghan Markle arrives at NBC Universal's 70th Annual Golden Globe Awards after party held at the Beverly Hilton Hotel on January 13, 2013 in Beverly Hills, California. (Photo by Paul A. Hebert/Getty Images)
BEVERLY HILLS, CA - JANUARY 14: Actress Meghan Markle attends The Paley Center for Media's presentation of An Evening With 'Suits' at The Paley Center for Media on January 14, 2013 in Beverly Hills, California. (Photo by David Livingston/Getty Images)
WEST HOLLYWOOD, CA - JANUARY 24: Actress Meghan Markle attends the ELLE's Women in Television Celebration at Soho House on January 24, 2013 in West Hollywood, California. (Photo by Michael Kovac/Getty Images for ELLE)
LOS ANGELES, CA - JANUARY 26: Actress Meghan Markle attends the Entertainment Weekly Screen Actors Guild Awards pre-party at Chateau Marmont on January 26, 2013 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
NEW YORK, NY - MAY 16: Meghan Markle attends the USA Network 2013 Upfront event at Pier 36 on May 16, 2013 in New York City. (Photo by Michael N. Todaro/WireImage)
Actress Meghan Markle arrives on the red carpet for the MuchMusic Video Awards (MMVAs) in Toronto, June 16, 2013. REUTERS/Mark Blinch (CANADA - Tags: ENTERTAINMENT)
NEW YORK, NY - JULY 16: Meghan Markle attends Self Rocks the Summer Event on July 16, 2013 in New York City. (Photo by Jamie McCarthy/Getty Images for SELF Magazine)
NEW YORK, NY - JULY 17: Actress Meghan Markle attends 'Tales Of Endearment' Celebration Hosted By Diane von Furstenberg at DVF Accessories Shop on July 17, 2013 in New York City. (Photo by Monica Schipper/Getty Images)
NEW YORK, NY - SEPTEMBER 07: Meghan Markle poses backstage at the Herve Leger By Max Azria fashion show during Mercedes-Benz Fashion Week Spring 2014 at The Theatre at Lincoln Center on September 7, 2013 in New York City. (Photo by Neilson Barnard/Getty Images for Mercedes-Benz Fashion Week Spring 2014)
NEW YORK, NY - SEPTEMBER 08: Actress Meghan Markle attends the Tracy Reese show during Spring 2014 Mercedes-Benz Fashion Week at The Studio at Lincoln Center on September 8, 2013 in New York City. (Photo by Brian Killian/WireImage)
NEW YORK, NY - SEPTEMBER 08: Actress Meghan Markle attends the Tracy Reese show during Spring 2014 Mercedes-Benz Fashion Week at The Studio at Lincoln Center on September 8, 2013 in New York City. (Photo by Brian Killian/WireImage)
NEW YORK, NY - SEPTEMBER 10: Meghan Markle attends the Tory Burch fashion show during Mercedes-Benz Fashion Week Spring at David H. Koch Theater at Lincoln Center on September 10, 2013 in New York City. (Photo by Cindy Ord/Getty Images for Mercedes-Benz Fashion Week Spring 2014)
NEW YORK, NY - SEPTEMBER 10: Actress Meghan Markle attends the The 2013 Novak Djokovic Benefit Dinner at Capitale on September 10, 2013 in New York City. (Photo by Noam Galai/FilmMagic)
NEW YORK, NY - SEPTEMBER 11: Actress Meghan Markle attends the Annual Charity Day Hosted By Cantor Fitzgerald And BGC at the Cantor Fitzgerald Office on September 11, 2013 in New York, United States. (Photo by Janette Pellegrini/Getty Images for Cantor Fitzgerald)
NEW YORK, NY - SEPTEMBER 11: Actress Meghan Markle leaves the Mercedes-Benz Fashion Week at Lincoln Center for the Performing Arts on September 11, 2013 in New York City. (Photo by Ray Tamarra/Getty Images)
NEW YORK, NY - SEPTEMBER 11: Model Meghan Markle arrives at the Marchesa runway show during Mercedes-Benz Fashion Week Spring 2014 at The New York Public Library on September 11, 2013 in New York City. (Photo by Vivien Killilea/Getty Images)
NEW YORK, NY - OCTOBER 02: Actress Meghan Markle attends the Gala Tribute To Cate Blanchett during the 51st New York Film Festival at Alice Tully Hall at Lincoln Center on October 2, 2013 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK, NY - OCTOBER 30: Actress Meghan Markle attends American Ballet Theatre 2013 Opening Night Fall Gala at David Koch Theatre at Lincoln Center on October 30, 2013 in New York City. (Photo by Gary Gershoff/WireImage)
US actress Meghan Markle poses for pictures on the red carpet upon arrival for the world premier of the film 'The Hunger Games: Catching Fire' in Leicester Square, central London, on November 11, 2013. The dystopian universe of 'The Hunger Games' returns to cinema screens aiming to harness the star power of Oscar-winning actress Jennifer Lawrence and convey an unambiguous message of youthful rebellion. AFP PHOTO/ANDREW COWIE (Photo credit should read ANDREW COWIE/AFP/Getty Images)
LONDON, ENGLAND - NOVEMBER 11: Meghan Markle attends the UK Premiere of 'The Hunger Games: Catching Fire' at Odeon Leicester Square on November 11, 2013 in London, England. (Photo by Dave J Hogan/Getty Images)
LONDON, ENGLAND - NOVEMBER 19: Meghan Markle attends the London Global Gift Gala at ME Hotel on November 19, 2013 in London, England. (Photo by Karwai Tang/WireImage)
NBCUNIVERSAL EVENTS -- NBCUniversal Press Tour, January 2014 -- Pictured: (l-r) Gina Torres, Star 'Suits'; Bonnie Hammer, Chairman, NBCUniversal Cable Entertainment Group; Meghan Markle, Star 'Suits'; Sarah Rafferty, Star 'Suits'; Jackie De Crinis, Executive Vice President of Original Programming, USA Network -- (Photo by: Paul Drinkwater/Network/NBCU Photo Bank via Getty Images)
PASADENA, CA - JANUARY 19: Actress Meghan Markle attends the NBC/Universal 2014 TCA Winter Press Tour held at The Langham Huntington Hotel and Spa on January 19, 2014 in Pasadena, California. (Photo by Tommaso Boddi/WireImage)
WEST HOLLYWOOD, CA - JANUARY 22: Actress Meghan Markle attends ELLE's Annual Women in Television Celebration on January 22, 2014 in West Hollywood, California. (Photo by Stefanie Keenan/Getty Images for Elle)
NEW YORK, NY - JANUARY 30: Actress Meghan Markle attends the 3rd Annual NFL Characters Unite at Sports Illustrated on January 30, 2014 in New York City. (Photo by Cindy Ord/Getty Images)
NEW YORK, NY - JANUARY 31: Actress Meghan Markle attends DirecTV Beach Bowl 2014 at the Gansevoort Hotel on January 31, 2014 in New York City. (Photo by Astrid Stawiarz/Getty Images for DirecTV)
NEW YORK, NY - FEBRUARY 01: Model Meghan Markle attends DIRECTV's 8th Annual Celebrity Beach Bowl at Pier 40 on February 1, 2014 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
NEW YORK, NY - FEBRUARY 06: Actress Meghan Markle attends the Marc Jacobs Daisy Chain Tweet Pop Up Shop Party at Marc Jacobs Pop Up Shop on February 6, 2014 in New York City. (Photo by Bennett Raglin/Getty Images)
NEW YORK, NY - FEBRUARY 08: Meghan Markle is seen on February 8, 2014 in New York City. (Photo by NCP/Star Max/GC Images)
NEW YORK, NY - FEBRUARY 11: Meghan Markle wearing Miu Miu at Miu Miu Women's Tales 7th Edition - 'Spark & Light' Screening - Arrivals at Diamond Horseshoe on February 11, 2014 in New York City. (Photo by Bryan Bedder/Getty Images for Miu Miu)
NEW YORK, NY - MAY 15: Meghan Markle attends the 2014 NBCUniversal Cable Entertainment Upfronts at The Jacob K. Javits Convention Center on May 15, 2014 in New York City. (Photo by D Dipasupil/FilmMagic)
NEW YORK, NY - SEPTEMBER 05: Model Meghan Markle attends Peter Som during MADE Fashion Week Spring 2015 at Milk Studios on September 5, 2014 in New York City. (Photo by Paul Morigi/WireImage)
NEW YORK, NY - SEPTEMBER 05: Model Meghan Markle (L) and actress Jamie Chung attend an exclusive preview of the Marchesa Voyage for ShopStyle collection on September 5, 2014 in New York City. (Photo by Neilson Barnard/Getty Images for ShopStyle)
NEW YORK, NY - OCTOBER 01: Meghan Markle attends RELAIS & CHATEAUX 60th Anniversary Guest Chef Dinner Launch at Consulate General of France on October 1, 2014 in New York City. (Photo by Bryan Bedder/Getty Images for Relais & Chateaux)
TORONTO, ON - OCTOBER 08: Actress Meghan Markle attends the Jimmy Choo opening at Yorkdale Shopping Mall on October 8, 2014 in Toronto, Canada. (Photo by George Pimentel/WireImage)
DUBLIN, IRELAND - OCTOBER 17: Meghan Markle, american actress, model and spokesperson attends the 'Bridging the Gender Gap' special session at the Convention Centre on October 17, 2014 in Dublin, Ireland. The summit, which is in its fifth year, connects and guides young talent from around the world with global leaders and public figures acting as One Young World counsellors. This year's theme is Peace and Conflict Resolution and will use Ireland's history as an example to guide discussion. (Photo by Clodagh Kilcoyne/Getty Images)
TORONTO, ON - OCTOBER 22: Meghan Markle attends Hudson's Bay And The Isabella Blow Foundation Present Fashion Blows at The Hudson's Bay on October 22, 2014 in Toronto, Canada. (Photo by Sonia Recchia/WireImage)
NEW YORK, NY - OCTOBER 28: Model Meghan Markle attends the Elton John AIDS Foundation's 13th Annual An Enduring Vision Benefit at Cipriani Wall Street on October 28, 2014 in New York City. (Photo by Jamie McCarthy/WireImage)
NEW YORK, NY - FEBRUARY 12: Actress Meghan Markle attends Prada The Iconoclasts, New York 2015 on February 12, 2015 in New York City. (Photo by Neilson Barnard/Getty Images For Prada)
NEW YORK, NY - FEBRUARY 13: Actress Meghan Markle attends Wes Gordon runway show during MADE Fashion Week Fall 2015 at Milk Studios on February 13, 2015 in New York City. (Photo by Mireya Acierto/Getty Images)
LONDON, ENGLAND - MARCH 03: Amber Nuttall (L) and Meghan Markle attend the premiere of 'A Postcard From Istanbul' directed by John Malkovich in collaboration with St. Regis Hotels & Resorts at 5 Hertford Street on March 3, 2015 in London, England. (Photo by David M. Benett/Getty Images)
NEW YORK, NY - MARCH 10: Meghan Markle attends Step It Up for Gender Equality Celebrates The 20th Anniversary Of The Fourth World Conference On Women In Beijing at Hammerstein Ballroom on March 10, 2015 in New York City. (Photo by Esther Horvath/FilmMagic)
TORONTO, ON - OCTOBER 01: Actress Meghan Markle attends World MasterCard Fashion Week Fall 2015 Collections Day 3 at David Pecaut Square on March 25, 2015 in Toronto, Canada. (Photo by George Pimentel/WireImage)
SUITS -- Season:5 -- Pictured: Meghan Markle as Rachel Zane -- (Photo by: Nigel Parry/USA Network/NBCU Photo Bank via Getty Images)
NBCUNIVERSAL CABLE ENTERTAINMENT UPFRONT -- '2015 NBCUniversal Cable Entertainment Upfront at the Javits Center in New York City on Thursday, May 14, 2015' -- Pictured: Meghan Markle, 'Suits' on USA Network -- (Photo by: Peter Kramer/NBCUniversal Cable Entertainment/NBCU Photo Bank via Getty Images)
NEW YORK, NY - JUNE 02: Meghan Markle attends The UJA-Federation of New York's Entertainment Division Signature Gala at 583 Park Avenue on June 2, 2015 in New York City. (Photo by Stephen Lovekin/Getty Images)
NEW YORK, NY - JUNE 24: Actress Meghan Markle attends the 2015 NBC New York Summer Press Day at Four Seasons Hotel New York on June 24, 2015 in New York City. (Photo by Mireya Acierto/FilmMagic)
TORONTO, ON - OCTOBER 06: Actress and United Nations Women's Advocate, Meghan Markle, sharing the new Dove Self-Esteem Project resources with youth workers and helping young girls reach their full potential at Earl Bales Community Centre on October 6, 2015 in Toronto, Canada. (Photo by George Pimentel/Getty Images)
Meghan Markle attends 'The Twelfth Annual CFDA/Vogue Fashion Fund Awards' at Spring Studios in New York City. �� LAN (Photo by Lars Niki/Corbis via Getty Images)
TORONTO, ON - NOVEMBER 24: Actress Meghan Markle attends the Equinox Yorkville Dinner held at Kasa Moto on November 24, 2016 in Toronto, Canada. (Photo by George Pimentel/WireImage)
WEST HOLLYWOOD, CA - JANUARY 20: Actress Meghan Markle attends ELLE's 6th Annual Women In Television Dinner at Sunset Tower Hotel on January 20, 2016 in West Hollywood, California. (Photo by Jason Kempin/Getty Images)
LOS ANGELES, CA - JANUARY 21: Actress Meghan Markle attends the premiere of USA Network's 'Suits' season 5 held at Sheraton Los Angeles Downtown Hotel on January 21, 2016 in Los Angeles, California. (Photo by Tommaso Boddi/WireImage)
NEW YORK, NY - MARCH 17: Actress Meghan Markle attends AOL Build Presents 'Suits' at AOL Studios In New York on March 17, 2016 in New York City. (Photo by Brad Barket/Getty Images)
NEW YORK - MARCH 18: Meghan Markle seen at the Today Show on March 18, 2016 in New York, New York. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK - MARCH 18: Meghan Markle seen at the Today Show on March 18, 2016 in New York, New York. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
TORONTO, ON - MARCH 22: Actress Meghan Markle attends the World Vision event held at Lumas Gallery on March 22, 2016 in Toronto, Canada. (Photo by George Pimentel/WireImage)
TORONTO, ON - APRIL 15: Actress Meghan Markle poses in the CAFA portrait studio at The Fairmont Royal York Hotel on April 15, 2016 in Toronto, Canada. (Photo by George Pimentel/Getty Images Portrait)
NEW YORK, NY - APRIL 27: Actress Meghan Markle attends Glamour and L'Oreal Paris Celebrate 2016 College Women Of The Year at NoMad Hotel Rooftop on April 27, 2016 in New York City. (Photo by Nicholas Hunt/Getty Images for Glamour)
TORONTO, ON - APRIL 28: Actress Meghan Markle attends the Roland Mouret private dinner at Corkin Gallery on April 28, 2016 in Toronto, Canada. (Photo by GP Images/WireImage)
TORONTO, ON - OCTOBER 01: Actress Meghan Markle attends Sephora Unveils Toronto Eaton Centre Remodel at Toronto Eaton Centre on May 19, 2016 in Toronto, Canada. (Photo by George Pimentel/WireImage)
LOS ANGELES, CA - MAY 20: Meghan Markle arrives at the P.S. Arts' The Party held at NeueHouse Hollywood on May 20, 2016 in Los Angeles, California. (Photo by Michael Tran/FilmMagic)
TORONTO, ON - MAY 31: Actress Meghan Markle attends the Instagram Dinner held at the MARS Discovery District on May 31, 2016 in Toronto, Canada. (Photo by George Pimentel/WireImage)
TORONTO, ON - JUNE 09: Actress Meghan Markle attends Luminato Big Bang Bash 2016 held at the Hearn Generating Station on June 9, 2016 in Toronto, Canada. (Photo by George Pimentel/WireImage)
LONDON, ENGLAND - JUNE 28: Meghan Markle attends day two of the Wimbledon Tennis Championships at Wimbledon on June 28, 2016 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 04: Meghan Markle attends day eight of the Wimbledon Tennis Championships at Wimbledon on July 04, 2016 in London, England. (Photo by Karwai Tang/WireImage)
NEW YORK, NY - JULY 13: Actress Meghan Markle leaves the 'Today Show' taping at NBC Rockefeller Center Studios on July 13, 2016 in New York City. (Photo by Ray Tamarra/GC Images)
NEW YORK, NY - JULY 14: Actress Meghan Markle leaves the 'Today Show' taping at NBC Rockefeller Center Studios on July 14, 2016 in New York City. (Photo by Ray Tamarra/GC Images)
NEW YORK, NY - JULY 14: Actress Meghan Markle enters the 'Today Show' taping at NBC Rockefeller Center Studios on July 14, 2016 in New York City. (Photo by Ray Tamarra/GC Images)
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The diet involves an "attack" phase with pure protein, a "cruise" phase with protein and vegetables, a "consolidation" phase that adds in carbs and, lastly, "stabilization" phase that essentially means maintaining a healthy diet while implementing the "attack" method one day a week.

How long you remain in each phase depends on your end goal weight -- it's different for every patient, explains Dr. Dukan in his popular book. The diet has been found to cause weight loss quickly, because it sends the body into ketosis, a state of burning fat for energy when the body is lacking glucose. 

"My diet is efficient," Dukan once said, "It's very quick, which encourages people, and it's simple."

However, the founder of the diet himself once expressed concerns regarding the duchess on the diet. In 2014, when she was pregnant with Princess Charlotte, Dukan voiced he thought Kate lost "too much" weight before the royal wedding. "At the beginning she had good cheeks. Now, she has no cheeks," he explained.

Other nutritionists have criticized Dr. Dukan's techniques, especially for the food groups omitted from the diet. Despite the backlash, the Dukan diet retains a large following.

It's not yet confirmed if Meghan will adopt her future sister-in-law's wedding diet -- but given her love for exercise and healthy eating, we have no doubt she'll be just fine -- with or without it. 

Related: Here are the best diets for you

41 PHOTOS
Best diets in 2018
See Gallery
Best diets in 2018

#1 (tie) DASH Diet

DASH was developed to fight high blood pressure, not as an all-purpose diet. But it certainly looked like an all-star to our panel of experts, who gave it high marks for its nutritional completeness, safety, ability to prevent or control diabetes and its role in supporting heart health. It's widely considered to be a balanced dietary approach for anyone wanting to lose weight or simply improve overall health. 

Overall rank: 1 
Overall score: 4.1 out of 5

#1 (tie) Mediterranean Diet

With its emphasis on fruits and vegetables, olive oil, fish and other healthy fare, the Mediterranean diet is eminently sensible. And experts’ assessments of it were resoundingly positive, giving this diet an edge over many competitors. 

Overall rank: 1
Overall score: 4.1 out of 5

#3 Flexitarian Diet

The Flexitarian Diet outperformed many of its competitors, with particularly high scores in nutritional completeness, easiness to follow and long-term weight loss. The flexibility of the diet makes it a good fit for many people, and a more sustainable option compared with stricter diets.

Overall rank: 3
Overall score: 4 out of 5

#4 Weight Watchers Diet

Weight Watchers is a smart, effective diet. It surpassed other commercial diet plans in multiple areas, including for short- and long-term weight loss and how easy it is to follow. It’s also nutritionally sound and safe, according to experts. Among its pluses: an emphasis on group support, lots of fruits and vegetables and room for occasional indulgences. 

Overall rank: 4
Overall score: 3.9 out of 5

#5 (tie) MIND Diet

The MIND diet takes two proven diets – DASH and Mediterranean – and zeroes in on the foods in each that specifically affect brain health. Featuring a wide variety of options, from salad to nuts to fruits and veggies, this diet receives expert praise for its focus on real food. It's a healthy, sensible plan with science behind it.

Overall rank: 5
Overall score: 3.8 out of 5

#5 (tie) TLC Diet

Therapeutic Lifestyle Changes, or TLC, is a very solid diet plan created by the National Institutes of Health. It has no major weaknesses, and it’s particularly good at promoting cardiovascular health. However, the complete diet requires a “do-it-yourself” approach, in contrast to the hand-holding provided by some commercial diets. 

Overall rank: 5 
Overall score: 3.8 out of 5

#5 (tie) Volumetrics Diet

Volumetrics outperformed its competitors in many categories. It earned particularly high marks for being safe and nutritious, and experts said it could have a positive effect on heart health and diabetes. The diverse strengths of this eating plan give it broad appeal.

Overall rank: 5
Overall score: 3.8 out of 5

#8 Mayo Clinic Diet

This is the Mayo Clinic’s take on how to make healthy eating a lifelong habit. It earned especially high ratings from our experts for its nutrition and safety and as a tool against diabetes. Experts found it moderately effective for weight loss. 

Overall rank: 8
Overall score: 3.7 out of 5

#9 Ornish Diet

The Ornish Diet got a mixed reaction from experts. On one hand, it’s nutritionally sound, safe and tremendously heart-healthy. On the other, it’s not easy for dieters to adhere to the severe fat restriction the diet demands. 

Overall rank: 9
Overall score: 3.6 out of 5

#10 (tie) The Fertility Diet

If you make these changes to your diet, weight and activity, you can increase ovulation and get pregnant faster – or so the claim goes. The Fertility Diet impressed experts, receiving moderate-to-high scores across the board. It performed particularly well in the diabetes, easiness-to-follow, nutrition and safety categories. Still, if getting pregnant is your aim, while it's considered a sensible diet, experts say there still isn't sufficient data to support the premise that it will help with fertility.

Overall rank: 10
Overall score: 3.5 out of 5

#10 (tie) Vegetarian Diet

As a health diet, vegetarianism is solid. It’s decent at producing rapid weight loss, according to experts, and is strong in other areas, such as heart health and nutritional completeness, which arguably are more important. 

Overall rank: 10
Overall score: 3.5 out of 5

#12 (tie) Jenny Craig Diet

Jenny Craig drew praise from experts for being easy to follow, nutritionally complete and safe, and for offering dieters emotional support. But these experts were lukewarm about its potential to bolster heart health or help people with diabetes, and noted that Jenny Craig’s cost could be a roadblock for some. 

Overall rank: 12
Overall score: 3.4 out of 5

#12 (tie) Traditional Asian Diet

The Traditional Asian diet is a reasonable choice for an eating pattern, with an emphasis on foods such as rice and fish, and little red meat. Experts handed out high marks in nutrition and safety, but doubted the plan’s ability to deliver short- or long-term weight loss. 

Overall rank: 12
Overall score: 3.4 out of 5

#14 Anti-Inflammatory Diet

The Anti-Inflammatory Diet itself is nutritionally sound with its focus on whole plant foods, but experts expressed doubt about the potential effectiveness of the diet for weight loss. Others said the impact this diet might have on inflammation in the body still isn't clear.

Overall rank: 14
Overall score: 3.3 out of 5

#15 (tie) Flat Belly Diet

The Flat Belly Diet landed near the middle of the pack because most of its scores from the experts were right around average. It did get high marks in safety and nutrition. 

Overall rank: 15
Overall score: 3.2 out of 5

#15 (tie) Nutritarian Diet

An emphasis on whole plant-based foods makes the Nutritarian diet a clearly healthy choice – if you're able to stick with it. Given its many dietary restrictions, panelists questioned whether the salad-heavy diet is a viable long-term option for most people trying to shed weight and reach peak health.

Overall rank: 15
Overall score: 3.2 out of 5

#15 (tie) Spark Solution Diet

The Spark Solution diet is designed around nutritious, reduced-calorie meals that optimize your metabolism, along with a regular fitness routine. Though it’s not particularly novel, it’s a sensible diet, and there’s a good chance it will help you lose weight and keep it off. It’s a “comprehensive program that can lead to healthier eating behaviors,” one expert said. 

Overall rank: 15
Overall score: 3.2 out of 5

#18 Engine 2 Diet

Though experts acknowledged the Engine 2 Diet’s benefits for heart health and diabetes control and prevention, they faulted the program for being unnecessarily restrictive and “gimmicky,” and called for more research into some of its claims. “I fail to see anything unique, innovative or useful with this diet,” one expert said.

#19 (tie) Biggest Loser Diet

The Biggest Loser Diet received high marks for short-term weight loss, safety and soundness as a regimen for diabetes, and it was rated moderately effective for heart health. But many panelists felt that in a sea of diets, it’s not overly special. 

Overall rank: 19
Overall score: 3 out of 5

#19 (tie) Nutrisystem Diet

Nutrisystem sits near the middle of the standings. It’s safe, easier to follow than many other diets and has few nutritional deficiencies, according to experts. As a heart-healthy diet, it’s off the mark. 

Overall rank: 19
Overall score: 3 out of 5

#19 (tie) Vegan Diet

Overall, the health experts were lukewarm on veganism despite giving it fairly high marks as a diabetes or heart-disease diet. It is extremely restrictive, doesn’t offer built-in social support and may not provide enough of some nutrients. 

Overall rank: 19
Overall score: 3 out of 5

#22 (tie) Eco-Atkins Diet

One expert summed up Eco-Atkins as a "healthier version of the Atkins diet, but compliance is likely to be more difficult." That's because it's restrictive and little guidance is available. 

Overall rank: 22
Overall score: 2.9 out of 5

#22 (tie) Glycemic-Index Diet

Experts were less than impressed with the Glycemic-Index diet, which distinguishes “good” carbs from “bad.” Although the diet’s ratings in nutrition and safety were relatively strong, it scored particularly low on long-term weight loss, heart benefits and ease of adherence.. 

Overall rank: 22
Overall score: 2.9 out of 5

#22 (tie) South Beach Diet

Although the South Beach Diet earned positive ratings for being able to produce rapid weight loss, its restrictions can make it difficult for dieters to keep the pounds off, experts said. Most were less enthusiastic about its ability to combat diabetes or heart disease. 

Overall rank: 22
Overall score: 2.9 out of 5

#22 (tie) Zone Diet

The Zone Diet lagged behind higher-ranked diets, if not always by much, in nearly all ratings categories, including weight loss, how easy it is to follow and its effect on diabetes and heart health.

Overall rank: 22
Overall score: 2.9 out of 5

#26 (tie) Abs Diet

The experts found the Abs Diet moderately effective for quick weight loss and middle of the road in most other respects. They took issue with the company’s claim that dieters can drop up to 12 pounds of belly fat in two weeks and questioned the evidence behind some of its tactics. 

Overall rank: 26
Overall score: 2.8 out of 5

#26 (tie) Macrobiotic Diet

Experts gave little credence to the Macrobiotic Diet on several counts: Following the plan is a challenge. It’s an extreme change from the standard American diet. And it’s awfully strict. The macrobiotic approach, one expert summed up, is “a mix of sound dietary guidance, mysticism, folklore and nonsense.” 

Overall rank: 26
Overall score: 2.8 out of 5

#26 (tie) SlimFast Diet

SlimFast is a reasonable approach to dieting, experts concluded. It outscored a number of competitors on weight loss and as a diabetes diet, and being highly structured, it’s fairly easy to follow. But it scored lower than many other diets on heart health. 

Overall rank: 26
Overall score: 2.8 out of 5

#29 (tie) HMR Program

The HMR Program received moderate scores in most measures. It did particularly well in categories such as short-term weight loss, nutrition, safety and healthiness. Still, some experts weren’t convinced the costly meal-replacement program is necessary. “I would only suggest this under extreme circumstances,” one said. “It’s very expensive and not practical for most people.”

Overall rank: 29
Overall score: 2.7 out of 5

#29 (tie) Medifast Diet

Experts were likewise unenthused about Medifast. It scored above average in short-term weight loss but was dragged down by lower marks in most other categories. 

Overall rank: 29
Overall score: 2.7 out of 5

#31 Acid Alkaline Diet

The Acid Alkaline diet’s premise is that by helping your body control your pH through diet, you’ll gain health and longevity. pH is a measure of acids and alkalines throughout the body on a 0 to 14 scale, and supporters argue that eating acid-forming foods – like red meat – tips your pH balance out of whack and sets the stage for poor health. But don’t hold your breath for this diet to work. It’s “ridiculous and poorly researched,” one expert said. “It’s not based on science.” 

Overall rank: 31
Overall score: 2.4 out of 5

#32 (tie) Paleo Diet

Experts took issue with the Paleo diet on every measure. Regardless of the goal – weight loss, heart health or finding a diet that’s easy to follow – most experts concluded that it would be better for dieters to look elsewhere. “A true Paleo diet might be a great option: very lean, pure meats, lots of wild plants,” said one expert – quickly adding, however, that duplicating such a regimen in modern times would be difficult. 

Overall rank: 32
Overall score: 2.3 out of 5

#32 (tie) Raw Food Diet

The experts gave the Raw Food Diet solid marks for weight loss, both for the short and long term, but considered it all but impossible to follow, and its nutritional completeness and safety raised concerns. “Doing it well involves considerable commitment and effort, knowledge and sacrifice,” one expert said. “And there are diets that require less of all these that are likely to be just as healthful.” 

Overall rank: 32
Overall score: 2.3 out of 5

#32 (tie) Supercharged Hormone Diet

Experts were not eager to recommend the Supercharged Hormone Diet, which received mediocre marks in all categories. It performed particularly poorly in areas such as easiness to follow, long-term weight loss, nutrition and effect on diabetes and heart health.

Overall rank: 32
Overall score: 2.3 out of 5

#35 The Fast Diet

This pattern of eating is often referred to as the 5:2 diet – you eat normally for five days of the week and cut your calories to about 25 percent of normal intake on two nonconsecutive days of the week. Men consume just 600 calories on their two weekly fast days, while women are limited to 500 calories. Not surprisingly, the experts had plenty of concerns, and the Fast Diet landed toward the bottom of the Best Diets Overall rankings. 

Overall rank: 35
Overall score: 2.2 out of 5

#36 Atkins Diet

Many of our experts found the popular low-carb Atkins Diet leaves much to be desired, at least as an all-purpose diet. Although our expert panel concluded that it could outperform nearly all of its competitors in short-term weight loss, unfavorable marks in other measures – including long-term weight loss, nutrition, safety and heart health – yanked down Atkins in the standings. 

Overall rank: 36
Overall score: 2.1 out of 5

#37 (tie) Body Reset Diet

Experts were unenthusiastic about the Body Reset Diet, which received mediocre marks in all categories. It performed particularly poorly in areas such as long-term weight loss and easiness to follow. 

Overall rank: 32
Overall score: 2 out of 5

#37 (tie) Whole30 Diet

The Whole30 diet landed near the bottom again this year. The diet has been docked for an absence of scientific support; its severely restrictive nature; its elimination of whole grains, legumes and dairy; and its short-term approach and long-term promises.

Overall rank: 38
Overall score: 2 out of 5

#39 (tie) Dukan Diet

The Dukan Diet tied for last, with experts giving it dismal ratings in almost every category. Its overall score was more than a full star below average. It’s too restrictive, with lots of rules, and there’s no evidence it works.

Overall rank: 39
Overall score: 1.9 out of 5

#39 (tie) Keto Diet

The aim of the Keto diet is to help a person lose weight burning fat by entering into a state of ketosis, in which the body breaks down dietary and stored fat into substances that are called ketones. But the strictly carb-limited, high-fat diet left some experts concerned about nutritional imbalances (a couple recommended medical supervision would be necessary); others raised concerns the diet is extreme or rigid and would be difficult to sustain.

Overall rank: 29
Overall score: 1.9 out of 5

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