Vitamins, Fat Soluble, 97  Vitamin D, continued D2 D2 ○ Found in plants, pharmacological form D3 D3 ○ Found in milk, formed in sun exposed skin 25-OH D3 25-OH D3 ○ Storage form 1,25-(OH)2D3 (Calcitriol) 1,25-(OH)2D3 (Calcitriol) ○ Active form