Television talk show host and actress Oprah Winfrey said a thyroid condition slowed her metabolism and caused her to gain nine kilos.
"My body was turning on me," Winfrey, 53, says in the October issue of O, the Oprah Magazine. "First hyperthyroidism, which sped up my metabolism and left me unable to sleep for days. Most people lose weight. I didn't."
Winfrey says she then experienced hypothyroidism, which slowed her metabolism and made her constantly sleepy.
An exhausted and stressed Winfrey discovered the condition after finishing taping of her shows in May. She took a month-long break in Hawaii to regain her health.
Discussing the condition on the October 16 edition of her TV show, Winfrey said she "wanted so many other women who are going through the same thing to check on yourself and recognize that ...it's an issue we all share in common."
She devoted the show to women's health issues and featured Dr. Christiane Northrup, author of The Wisdom of Menopause.