Key Ingredients Brewers Yeast (may contain gluten), Choline Bitartrate, Niacin, Inositol, Thiamin (B1), Vitamin B6, Pantothenic Acid (B5), Riboflavin (B2), Vitamin B12, Folic Acid, Biotin, Vitamin C. This balanced formula contributes to the reduction of tiredness and fatigue while supporting the normal functioning of the nervous system.