Peak Athletic Performance and Vitamin D

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Dr. John Cannell

Dr. John Cannell

“No thanks Doc. I’m fine.”

“No way doc.” I had just finished informing my vitamin D deficient patient about the benefits of vitamin D, telling him he needed to take 5,000 IU per day. I used all the techniques I have learned in 30 years of medical practice to convince someone when proper treatment is needed. However, he knew that the U.S. government said young people need only 200 IU/day, not 5,000. He also knew the official upper limit was 2,000 IU/day. “What are you trying to do doc, kill me?”

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