This supplement may be used daily or 3 hours prior to competition to reduce stress and calm the nervous horse. Yea-Sacc 1026 supplies a source of live, naturally-occurring beneficial micro-organisms for healthy digestion and gut stability. 1 oz. contains: 1-Tryptophan 1,000 mg, 500 mg B-1 vitamin with additional vitamins and minerals. Daily Dosage: 1-2 oz.