What is it?Holland & Barrett Debittered Brewer's Yeast tablets provide a nutritional supplement.High Strength, Natural Brewer’s Yeast Acts As a Nutritional Supplement Suitable For Vegetarians and Vegans What Are the Benefits of This Supplement?Brewer’s yeast is a tiny organism made from the one-celled fungus Saccharomyces cerevisiae. It can be used to make beer as well as nutritional supplements. Holland & Barrett International Limited, Barling Way, CV10 7RH, UKHolland & Barrett Limited, 45 Henry St, D01 E9X8, Ireland