Other Ingredients: Ultra Potent-C [calcium ascorbate, niacinamide ascorbate, ascorbic acid, xylitol, sodium ascorbate, magnesium ascorbate, L-lysine HCl, ascorbyl palmitate, citrus bioflavonoid complex, potassium ascorbate, tetrasodium pyrophosphate, alpha-D-ribofuranose, L-cysteine HCl, and L-glutathione], proprietary mushroom decoction, microcrystalline cellulose, cellulose, calcium silicate, stearic acid (vegetable), croscarmellose sodium, silica, zinc citrate, selenomethionine, magnesium stearate (vegetable), cholecalciferol, coating (water, hypromellose, medium chain triglycerides, and hydroxypropylcellulose)