Complex B 620 mg These vitamins activate metabolism, growth and cell respiration, act as enzyme catalysts, are necessary for the synthesis of carbohydrates, proteins (such as hemoglobin), and fatty acids. The advantage of taking them together is that, since most are found in the same foods, if you are deficient in one, it is very likely that you will be deficient in many of the others. In addition, on the other hand, being water soluble, these vitamins are lost in the urine, so the body lacks "reserves" of these. Some of the diseases that cause deficiency states of B vitamins are: pellagra (extreme dry skin), beri beri, pernicious anemia. Complex B is an excellent supplement for people who suffer from deficiency symptoms such as: skin lesions, brittle hair and nails, fatigue, anemia, athletes (due to sweating) Directions for use: 1 capsule a day, with food. Presentation: Package of 60 capsules of 600 mg.