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The FDA cautions that prescription testosterone is only approved for men who have low testosterone due to certain medical conditions. Wladimir Bulgar/Getty Images/Science Photo Libra hide caption

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Wladimir Bulgar/Getty Images/Science Photo Libra

Testosterone is probably safe for your heart. But it can't stop 'manopause'

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Anemic patients did not know about their condition during a testosterone trial. Renphoto/Getty Images hide caption

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Renphoto/Getty Images

Researchers Failed To Tell Testosterone Trial Patients They Were Anemic

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Several new studies show mixed results for men taking testosterone supplements. Garo/Phanie/Passage/Getty Images hide caption

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Garo/Phanie/Passage/Getty Images

Does Testosterone Improve Older Men's Health? It Depends

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