In 1930, Paul Karrer elucidated the proper construction for beta-carotene, the main precursor of vitamin A, and recognized other carotenoids. Karrer and Norman Haworth verified Albert Szent-Györgyi's discovery of ascorbic acid and made important contributions towards the chemistry of flavins, which led to the identification of lactoflavin. Ashwagandha is an https://ufabetal.online/