Doctor: Bernie Sanders in 'overall very good health'

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DES MOINES, Iowa -- Bernie Sanders is in "overall very good health," according to a letter from his doctor released by the Democratic presidential candidates' campaign Thursday.

The letter from Dr. Brian Monahan, who has been Sanders' physician for 26 years, says Sanders is active in his work and recreational life "without limitation."

Sanders had his last physical exam in November, according to the letter, when his blood pressure was 136/81 and he weighed 179 pounds. His thyroid profile, blood count, colonoscopy, and electrocardiogram were normal.

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Doctor: Bernie Sanders in 'overall very good health'
MILWAUKEE, WI - FEBRUARY 11: Democratic presidential candidate Senator Bernie Sanders (L) and Hillary Clinton participate in the PBS NewsHour Democratic presidential candidate debate at the University of Wisconsin-Milwaukee on February 11, 2016 in Milwaukee, Wisconsin.The debate is the final debate before the Nevada caucuses scheduled for February 20. (Photo by Win McNamee/Getty Images)
DURHAM, NH - FEBRUARY 04: Democratic presidential candidates former Secretary of State Hillary Clinton and U.S. Sen. Bernie Sanders (I-VT) during their MSNBC Democratic Candidates Debate at the University of New Hampshire on February 4, 2016 in Durham, New Hampshire. This is the final debate for the Democratic candidates before the New Hampshire primaries. (Photo by Justin Sullivan/Getty Images)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
Senator Bernie Sanders, an independent from Vermont, left, and Hillary Clinton, former U.S. secretary of state, participate in the first Democratic presidential debate at the Wynn Las Vegas resort and casino in Las Vegas, Nevada, U.S., on Tuesday, Oct. 13, 2015. While tonight's first Democratic presidential debate will probably lack the name-calling and sharp jabs of the Republican face-offs, there's still potential for strong disagreements between the party's leading contenders. Photographer: Josh Haner/Pool via Bloomberg
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton shake hands at the end of a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: (L-R) Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT), Hillary Clinton and Martin O'Malley take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
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The letter also says that over the years, he has been treated for gout, mild hypercholesterolemia, diverticulitis, hypothyroidism, laryngitis secondary to esophageal reflux, lumbar strain, and that he had superficial skin tumors removed. Sanders had hernia surgery last fall and had a cyst removed on his vocal cord, an experience he writes about in his 1997 autobiography. Both are mentioned in the letter.

He takes levothyroxine, a drug that supplement's hormones produced by the thyroid, and indomethacin, an anti-inflammatory, according to the document.

The letter also states he does not use tobacco and drinks alcohol "infrequently."

Sanders' campaign promised to release his medical records before the Iowa Caucuses, now just four days away, and the 74-year old candidate said his health was a fair issue to discuss. However, his campaign took issue when David Brock, who runs several pro-Hillary Clinton super PACs, considered plans to attack Sanders on his health.

Clinton, who is 68, has already released a similar medical record.

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