Helps change PH in bowel and interferes with candida growth. Not harmful. For bowel control of intestinal yeast and control of fungus overgrowth. Normally safe for long-term use. Grapefruit - 10 mg, Sorbic Acid - 100 mg, Magnesium - 50 mg (as 52% oxide/48% caprylate), Biotin - 300 mcg, Vitamin E - 5 IU, Calcium - 100 mg (as 50% oxide/48% caprylate), Zinc (as zinc undecylenate). Other ingredients: Hypromellose, microcrystalline cellulose, silicon dioxide, magnesium stearate, vegetable medium chan triglycerides, ethylcellulose, and titanium dioxide. Dose: 1capsules twice per day 90 capsules.