Comment on The essential guide to vitamin D and the sun by Melissa.
I have read (possibly from Dr. Mercola’s site) that in the summer months during the peak hours of the day, that a fair to medium skinned person produces approximately 25,000 IU of vitamin D within around 15 minutes (on average, of course). Once the body has produced this amount, the UVA rays will go about destroying any excess. This tells me that 1) 25,000 is a good ballpark for how much our bodies REALLY need, and 2) The body is amazingly wise in the way it regulates its optimum levels!
