Sentinel Brewer's Yeast 500mg Tablet - Rich in B Vitamins and Amino Acids. ‣ Natural source of B vitamins, particularly B1, B2, B3, B6, and B9. ‣ Contains essential amino acids for overall health support. ‣ Supports a healthy metabolism and energy levels. SUGGESTED USE: Take 1 tablet daily with a meal. INGREDIENTS: Brewer's yeast (Saccharomyces cerevisiae).