EECS 1022 Chapter Notes - Chapter 2.8: Endocrine Society, Sunscreen, Sunburn
22 May 2020
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Black skin natural sunscreen protects the skin. Traditional culture: modern africans - levels go down to average of canadians, for african origin canadians 25% have vitamin d levels close to those that have ricketts. Africans don"t want skin to go darker, so they avoid sunshine. Vitamin d: a modern example of the fortification vs. supplementation. New rda: 200 units/day to 600 units/day. Minimize risk of harm due to lack of an agent or excess. The upper level of vitamin d 100mg/day or. 4000 units/day: 10,000 units/day gets enough uv so you don"t get sunburn, for someone with very black skin, they could be out in the sun for 2 hours to make what a white person can make in. Fortification i. e. dairy put vitamin d in milk: supplementation is more expensive than fortification, but we"re still stuck with supplementation. Secondary outcomes in rct don"t count unless we found most people died in treatment arm.
