What is the optimal level?
Doctors from the University of Wisconsin, Madison, said that the medical community increasingly agrees the optimal level for vitamin D is at least 30 to 32 nanograms per milliliter of blood (ng/mL). Using that measure, three in four U.S. adults are likely low, and to reach the correct level, should take a least 1,000 IU of vitamin D3 per day, the most beneficial form.
Pro football players
Researchers in this study measured vitamin D levels in 89 black and white National Football League players during training camp and found 81 percent were abnormally low, Twenty-seven were deficient, with levels less than 20 ng/mL; and 45 were low, with 20 to 31.9 ng/mL. Only 17 players had at least 32 ng/mL of vitamin D, which doctors now agree is the minumum optimal level. Players with muscle injuries who had missed at least one practice or game in the prior season had much lower levels of vitamin D than non-injured players; the only significant difference between them, doctors said. African Americans tend to make far less vitamin D from sunlight than whites, and 93 percent of the black players had low levels compared to 31 percent for white players. While low levels of vitamin D may not have caused the injuries, the study “highlights a potential problem”, study authors concluded.
Was Mozart deficient?
Mozart suffered many infectious diseases and controversy surrounds his death. Researchers now think Mozart may have been deficient in vitamin D because he composed much of his music at night and slept during the day. The northern latitude of Vienna, Austria prevents making vitamin D from sunlight six months per year, and Mozart died in December, 1791 in the middle of the vitamin D winter, when his levels would have been very low.
Reference: American Orthopaedic Society For Sports Medicine; July, 2011, Abstract 46
From the December 2011 newsletter
- More Vitamin D, Less Depression
- Vitamin D–The Latest Scientific Findings
- Calcium and Vitamin D Help Adolescent Girls Ensure Bone Health Later in Life
- Vitamin Supplements Help the Heart
- Lutein – Vitamin A Keep Eyes Healthy