Vitamin B complex other food sources?

The B Vitamins, especially vitamin B1, B2, Niacin, Biotin, Pantothenic acid and vitamin B6 are generally found in the same foods and work together in converting dietary protein, carbs and fat to storage or energy. In humans deficiency of one B vitamin is usually associated with poor intake of several B vitamins. If you consume 300 mg of the vitamin a day you could encounter toxic results. Although the vitamin when taken orally is not stored well in the body. If you receive B1 injections intravenously repeated times it might cause anaphalactic shock.