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Thyroid Disease

Jillian Michaels

Updated September 25, 2008

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Fitness expert Jillian Michaels has said that she battles thyroid problems.
Jillian Michaels
Frederick M. Brown / Getty Images Entertainment
Fitness expert Jillian Michaels -- known for being one of the trainers on "The Biggest Loser" -- reportedly has struggled with thyroid and weight problems.

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