> and almost no risks

This isn't true--especially for Vitamin D. We have several doctors at this point who deal with cases where too much Vitamin D causes Calcium uptake issues and affects cognition and heart function.

Vitamin D is NOT something like Vitamin C. Your body easily dumps excessive Vitamin C so you can take fairly massive doses with no real ill effects.

Your body has a much tougher time excreting Vitamin D--so large doses of Vitamin D can cause issues and accumulate.