BIOL 2020 Chapter Notes - Chapter 2.0: Endocrine Society, Sunburn, Sunscreen
7 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. Fortification i. e. dairy put vitamin d in milk stuck with supplementation. Secondary outcomes in rct don"t count unless we found most people died in treatment arm. If it"s bad we accept it, if it"s good we reject it. Metanalysis of rct the top evidence (cochrine reviews) Accepted to lower risk of hip fracture. Adherence required to prove that drug works problem of studies that don"t prove vitamin d occurs. Half-life of drug is default starting point: ex.
