Unclear... No Magic: A few skin problems historically found associated with vitamin deficiencies (3rd world countries); in 1st world countries this is rare. Vitamins: extremely prevalent in most foods (i.e. Cheap to isolate & sell), needed in only trace amounts (tiny quantities adequate), thus have become a big industry in 1st world countries, despite no/limited evidence of efficacy for many issues see: emedicine.Com.
Answered 12/9/2013
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