You put sun block on your face, on the back of your hands but leave your torso, your legs exposed to the sun for about 15 minutes. if you're light skinned, in 15 minutes, you'll generate 10,000 units of vitamin d. if you're darker skinned, you need more like an hour. you'll get the new tree ant rich vitamin d that reduces the risk of cancer, plus the bonuses for the heart. >> larry: what if i take 10,000 milligrams of vitamin d. >> it's called international units. you could take 10,000, most people don't need to do that. if you take 1,000 or 2,000 units a day, that's fine. a lot of folks say t...