Solgar B2 Vitamins consist of a large number of substances that are involved in the metabolism of all living cells. Acting as coenzymes, they work together with proteins in the various enzyme systems of our body. The functions of the B Vitamins are closely synergistic, and because of these inter-relationships, a deficient intake of one or more of them can cause deficiencies in the others by hampering their utilisation. B Vitamins are water soluble and are not stored in the body. They must be replaced daily, and any excess is excreted. A deficiency of vitamin B2 can cause tissue inflammation and oversensitivity to bright lights. Intakes in excess of the body's requirements are excreted via the kidneys and may cause a harmless change in the colour of one's urine to fluorescent green/yellow. Food sources of riboflavin include liver, whole grains, mushrooms and almonds.Solgar B2 Vitamins are water soluble and are not stored in the body.Solgar Vitamin B2 is sugar, salt and starch free. KOSHERSolgar Vitamin B-2 (Riboflavin) 100mg Vegetable Capsules is a food supplement for adults. Solgar recommends one (1) capsule daily, preferably at mealtime, or as directed by a healthcare practitioner.Each vegetable capsule of Solgar Vitamin B-2 provides:Riboflavin (vitamin B2)100mgEncapsulated with these natural ingredients: magnesium stearate, silicon dioxide, microcrystalline cellulose.Vegetable capsule shell: hydroxypropylmethyl cellulose.