Brewer's Yeast is grown on hops, and is rich in B vitamins, including Biotin. Good for healthy hair, skin and nails.

Reference: http://www.spineuniverse.com/displayarticle.php/article981.html

Niacin supports healthy cholesterol levels. Niacin Flush-Free provides all the good effects of niacin without the unwanted and unpleasant flush reaction.

Thiamine assists in the formation of blood and promotes good circulation. Aids in the production of hydrochloric acid, which is needed for normal digestion. Supports thyroid hormone metabolism. Also, B1 supports healthy brain functions, particularly cognitive functions (learning and reasoning). References : "Prescription For Nutritional Healing" by Balch & Balch. Avery Books. Published by Penguin Putnam Inc.

Vitamin B2 (Riboflavin) is important for red blood cell and antibody formation, and is valuable for cell growth and repair. Benefits the eyes, hair, skin and nails. Considered essential for thyroid hormone production. References : "Prescription For Nutritional Healing" by Balch & Balch. Avery Books. Published by Penguin Putnam Inc.