An online reference book for dermatologists looking for reliable sources of history, clinical data, uses,..etc. of the most commonly used skincare ingredients.

Retinol: History, sources, benefits, and commercial uses. 

Retinol or Vitamin A1 is arguably the most indispensable vitamin for the human body, as it is required at all points of life, from embryogenesis to adulthood.1, 2 It is the alcohol (-OH) form of  Vitamin A that belongs to the family of fat-soluble vitamins.3 It was the first vitamin discovered. 

Animals, including human beings, cannot synthesize it de novo, therefore retinol must be obtained through foods and supplements.4

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