Presentation and composition: 60 capsules of 600mg, with brewer's yeast (370mg), choline (50mg), inositol (50mg), vitamin B3 (18mg), vitamin B5 (6mg), vitamin B6 (2mg), vitamin B2 (1.6mg), vitamin B1 (1.4mg), vitamin B9 (0.2mg), vitamin B12 (0.001mg), biotin (0.00015mg) Vegetable cellulose capsule. One capsule provides 100% of the RDA of all the B vitamins. Properties: These vitamins activate metabolism, growth and cellular respiration, act as enzymatic catalysts, are necessary for the synthesis of carbohydrates, proteins (such as hemoglobin), and fatty acids. The advantage of taking them together is that, because most are found in the same foods, if you suffer from a deficiency in one, it is very likely that the same will occur with many of the others. Furthermore, since these vitamins are water-soluble, they are lost in the urine, so the body lacks "reserves" of them. Some of the diseases that cause vitamin B deficiency states are: pellagra (extreme dry skin), beriberi, and pernicious anemia. B Complex is an excellent supplement for people who suffer from deficiency symptoms such as skin lesions, brittle hair and nails, fatigue, anemia, and athletes (due to sweating). Directions: Take 1 capsule daily with food.