Vitamin B1

Vitamin B1 — dosage, safety & deals FAQ

How much Thiamin do you need per day?

The RDA for adults is 1.2 mg/day for men and 1.1 mg/day for women age 19+. Pregnant and lactating women need 1.4 mg/day. Children's RDAs range from 0.5 mg (ages 1-3) to 0.9 mg (ages 9-13). Infants have an AI of 0.2-0.3 mg/day. — per the NIH Office of Dietary Supplements; general information, not medical advice.

Can you take too much Thiamin?

The Food and Nutrition Board did not establish a Tolerable Upper Intake Level for thiamin, due to lack of reports of adverse effects from high intakes (50 mg/day or more) from food or supplements. The body excretes excess thiamin in urine. The board noted excessive intakes could still have adverse effects. — per the NIH Office of Dietary Supplements; general information, not medical advice.

What are the signs of Thiamin deficiency?

In its early stage, thiamin deficiency can cause weight loss and anorexia, confusion, short-term memory loss and other mental signs and symptoms, muscle weakness, and cardiovascular symptoms such as an enlarged heart. The most common effect is beriberi, characterized mainly by peripheral neuropathy and wasting. Wernicke-Korsakoff syndrome is a more common manifestation of thiamin deficiency in the United States. — per the NIH Office of Dietary Supplements; general information, not medical advice.

Who is most likely to need more Thiamin?

Groups most likely to have inadequate thiamin status include people with alcohol dependence, older adults, people with HIV/AIDS, people with diabetes, and people who have undergone bariatric surgery. Up to 80% of people with chronic alcoholism develop thiamin deficiency. — per the NIH Office of Dietary Supplements; general information, not medical advice.