AYA Vitamin B1 Thiamin 100mg Tablets. The AYA Vitamin B1 Thiamin is a high strength formula that helps with:. Heart & Circulation. Mental Function. Thiamin is found within the brain's nervous tissue and can become depleted if large amounts of alcohol are consumed. Thiamin is needed to help with a normal energy metabolism level, as it converts carbohydrates into fuel.. How To Use. Take one tablet daily with a main meal.