Sisu Cool B50 - High potency, non-flushing B-Complex. The B Vitamins help provide the body with energy by converting carbohydrates into glucose. They are also essential for normal nervous system functioning, and for the maintenance of gastrointestinal muscle tone, as well as for the maintenance of healthy hair, skin, eyes, mouth and liver functions. Because B Vitamins are water-soluble, they must be replenished daily, especially during times of stress. Sisu Cool B50 is non-flushing, as Vitamin B3 is provided as Niacinamide, which does not cause the uncomfortable tingling and flushing that sometimes occurs with Niacin-based supplements.