Man stuns with 370-pound weight loss

For as long as he can remember, 31-year-old Ryan of Lilbourn, Missouri, struggled with his weight.

"I was always a heavier kid," he said. "In my high school, I was lower 200 [lbs.] to middle-upper 200 [lbs.]. In college, I put another hundred pounds on me."

"The rest of it came after college," he said, adding he eventually got to 550 lbs.

Ryan's struggle with his weight came to a head in October 2012, when his twin brother -- who was also the same weight -- was diagnosed with congestive heart failure.

"It was kind of a wake-up call [for] me," Ryan said, "that I needed to get my life in order."

Ryan subsequently signed up for a program that concentrates on portion control and exercise. The results were stunning. In a year and a half, he lost 350 pounds.

"It worked," he said. "It makes sense. Calories in vs. calories out -- you're going to lose weight."

Now, Ryan -- who is a band teacher at a local high school -- is showing off his stunning weight loss to Rachael Ray and her co-host, Bob Harper.

Check out the incredible results in the video above.

Also on AOL:
Woman can't believe her own 'Family Feud' response
The surprising cause of one woman's horrifying skin condition
Man who proclaimed he 'would date anyone!' on sign gets his first date ever