10 Food Sources of Thiamin (Vitamin B1)

Thiamin, also called vitamin B1, helps the body turn food into energy and supports normal cell function. It is present naturally in some foods and added to many enriched grain products. The NIH Office of Dietary Supplements lists these practical sources; amounts vary with brand, portion, and preparation.

Ten useful places to find B1

1. Fortified breakfast cereal. Check the Nutrition Facts label; some servings provide a substantial amount.

2. Enriched egg noodles. A cooked cup can contribute meaningfully.

3. Pork. A cooked pork chop is a notable source.

4. Trout. This fish provides B1 along with protein.

5. Black beans. A half-cup cooked portion contributes thiamin and fiber.

6. Enriched English muffins. Enrichment makes some grain foods reliable contributors.

7. Mussels. Cooked mussels contain thiamin.

8. Tuna. Amounts depend on species and portion.

9. Whole-wheat pasta. Whole grains can contribute smaller amounts as part of a meal.

10. Brown rice. A half-cup cooked serving contributes some thiamin; enriched white rice also contains added B1.

The list is not a ranking of what anyone must eat. A mixed eating pattern can include grains, legumes, seeds, nuts, meat, and fish according to preference, access, and medical needs. Some people avoid animal foods; fortified grains and legumes can still help supply B1.

Cooking and supplement context

Thiamin dissolves in water, and some can be lost when cooking liquid is discarded. This is not a reason to avoid cooking vegetables or grains; it is useful context when comparing food records. Most people in the United States get enough, and deficiency is uncommon, but risk can be higher for some people, including those with alcohol dependence. Some medicines can affect thiamin levels. A supplement is not automatically needed because a food contains B1. Ask a clinician or dietitian about symptoms, risk factors, medicines, or a suspected deficiency instead of self-treating.

Sources and further reading

• Thiamin: Fact Sheet for Consumers — NIH Office of Dietary Supplements.
• Thiamin: Fact Sheet for Health Professionals — NIH Office of Dietary Supplements.

Health disclaimer

This article is for general education only. Its information and suggestions are not medical advice, diagnosis, or treatment and may not be right for everyone. Ask a qualified health professional for advice that fits your health, medications, and needs before changing your diet, exercise, supplement use, or care.