I found the wikipedia entry useful in citing specific interesting studies (e.g., suggesting >50,000 IUs/day (orally) may be needed for toxicity). Plus a clarifi

I found the wikipedia entry useful in citing specific interesting studies (e.g., suggesting >50,000 IUs/day (orally) may be needed for toxicity). Plus a clarification of the 'how' of sunlight-produced D self-limiting: http://en.wikipedia.org/wiki/Vitamin_D http://en.wikipedia.org/wiki/Vitamin_D