Ingredients Microcrystalline Cellulose, Di-Calcium Phosphate, Thiamin (as Hydrochloride), Anticaking Agents (Vegetable Source Magnesium Stearate, Silicon Dioxide). Natures Aid Vitamin B1 Thiamin, 100 mg, 90 Tablets (Contributes to Normal Functioning of the Nervous System, Made in the UK, Vegan Society Approved).