Saturday, June 19, 2010

Vitamin D Toxicity: Lots of Sunshine Can Be a Problem

Many people getting alot of sunshine are highly sensitive to vitamin D. I've collected multiple reports of serious vitamin D side effects at doses of less than 1000 IU from people getting plenty of sunshine. This isn't 1000 IU/day. This is 1000 IU once. This is way way below the Food and Nutrition Board's toxicity threshold of 2000 IU/day.

These reports are reliable and make sense. Regular exposure to full body sunshine produces large daily doses of vitamin D in the skin. Even a small additional dose can be sufficient to instigate side effects when the body is already operating at a maximum dosage.

This isn't going to happen to everyone - everyone is different. But this effect isn't rare. If you get alot of sunshine, you have to expect side effects from vitamin D supplements even at low doses.

Reports of side effects from readers have been highly insightful. If you're reading this site because you've experienced vitamin D side effects - please tell your story even if it is exactly the same as previous comments. We need to know which stories are common and which ones are unusual.

Thanks to all.

Steve