Vitamin B Complex is a supplement and is used as an addition to healthy nutrition, not as a replacement. Vitamin B Complex contains the eight B vitamins: B1, B2, B3, B5, B6, B8, B11, B12. In short: - B1 (thiamine) helps the body make new cells. It also protects the immune system. - B2 (riboflavin) works as an antioxidant to help fight free radicals. It is also important for red blood cell production. - B3 (niacin) stimulates the HDL cholesterol, which is the 'good' cholesterol. More 'good' cholesterol leads to less 'bad' cholesterol in the blood. - B5 (pantothenic acid) breaks down fats and carbs for energy and is also responsible for the production of, among others, the hormone testosteron. - B6 (pyridoxine) helps regulate levels of the amino acid homocysteine (associated with heart disease). Pyridoxine is a major player in mood and sleep patterns because it helps the body produce serotonin, melatonin and norepinephrine, a stress hormone. - B8 (biotin) is associated with healthy hair, skin and nails. - B11 (folic acid) is known for it's positive effects during pregnancy. It supports the growth of the baby and prevents birth effects such as spina bifida. - B12 (cobalamin) is needed for the production of red blood cells and transportation of oxygen in the blood. Veganists are more likely to suffer from B12 shortage.