Cost per serving
$0.17
Priceyvitamin · 31 active deals
Every Vitamin B1 deal here is ranked by cost per dose— what you actually pay per serving, not the sticker price. Forms and absorption differ, so the cheapest bottle isn’t always the cheapest dose.
Right now the best value across our full Vitamin B1 catalog is at $0.006 per serving.
Thiamin (vitamin B1) is a water-soluble B vitamin that the body requires for energy metabolism and, therefore, for the growth, development, and function of cells; in its main active form, thiamin diphosphate, it serves as an essential cofactor for enzymes involved in glucose, amino acid, and lipid metabolism. Supplemental thiamin is used to treat thiamin deficiency and its consequences such as beriberi and Wernicke-Korsakoff syndrome, though a Cochrane review concluded the evidence from clinical trials is insufficient to guide the dose, frequency, duration, or route of thiamin supplementation for that syndrome. It has also been studied for diabetes and heart failure, where small studies suggest possible effects on glucose levels or left ventricular ejection fraction, but the authors did not assess the clinical significance of these findings, and for Alzheimer's disease, where existing trials were too small to draw conclusions. In each of these areas the NIH notes that larger, well-designed studies are needed to determine whether thiamin supplements are beneficial — per the NIH Office of Dietary Supplements; not medical advice.
The most commonly used forms of thiamin in supplements are thiamin mononitrate and thiamin hydrochloride, which the fact sheet describes as stable and water soluble. Benfotiamine is a synthetic thiamin derivative used in some supplements that, unlike these forms, is not water soluble and is converted to thiamin in the body. Multivitamin/mineral supplements containing thiamin typically provide about 1.5 mg, and thiamin is also available in B-complex or thiamin-only supplements.
Food sources of thiamin include whole grains, meat, and fish, and in the U.S. breads, cereals, and infant formulas are fortified with thiamin. The most common sources in the U.S. diet are cereals and bread, with pork another major source, while dairy products and most fruits contain little thiamin. Among the highest-providing foods listed are fortified breakfast cereals, enriched egg noodles, pork chops, trout, and black beans — per the NIH Office of Dietary Supplements.
Groups most likely to have inadequate thiamin status include people with alcohol dependence (up to 80% of people with chronic alcoholism develop deficiency), older adults, people with HIV/AIDS or diabetes, and people who have undergone bariatric surgery. In its early stage, deficiency can cause weight loss and anorexia, confusion, short-term memory loss, muscle weakness, and cardiovascular symptoms; its most common effect is beriberi (peripheral neuropathy and wasting), and a more common U.S. manifestation is Wernicke-Korsakoff syndrome — per the NIH Office of Dietary Supplements.
Because of the lack of reports of adverse effects from high thiamin intakes (50 mg/day or more) from food or supplements, the Food and Nutrition Board did not establish a Tolerable Upper Intake Level (UL) for thiamin; the body excretes excess thiamin in the urine. The apparent lack of toxicity may be explained by the rapid decline in absorption at intakes above 5 mg, although the FNB noted that excessive intakes could nonetheless have adverse effects — per the NIH Office of Dietary Supplements.
Cost per serving
$0.17
PriceyCost per serving
$0.08
Avg·−36%Cost per serving
$0.12
PriceyCost per serving
$0.17
PriceyCost per serving
$0.08
Avg·−43%Cost per serving
$0.07
Avg·−50%Cost per serving
$0.08
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$0.06
Avg·−54%Cost per serving
$0.09
AvgCost per serving
$0.07
Avg·−52%Cost per serving
$0.10
PriceyCost per serving
$0.06
Avg·−53%Cost per serving
$0.09
Avg·−33%Cost per serving
$0.09
Avg·−32%Cost per serving
$0.13
PriceyCost per serving
$0.07
Cost per serving
$0.09
PriceyCost per serving
$0.001
Cheap·−80%Cost per serving
<$0.001
Cheap·−98%Cost per serving
$11.36
PriceyCost per serving
$0.02
Avg·−68%Cost per serving
$0.007
Avg·−73%Cost per serving
<$0.001
Cheap·−91%Cost per serving
$0.006
Avg·−73%Amazon.com · 🌾 Vitamin B1
CPS
Price
$9.99
Amazon.com · 🌾 Vitamin B1
CPS
Price
$9.99
Amazon.com · 🌾 Vitamin B1
CPS
Price
$12.04
HerbsPro · 🌾 Vitamin B1
CPS
Price
$17.02
HerbsPro · 🌾 Vitamin B1
CPS
Price
$7.76
HerbsPro · 🌾 Vitamin B1
CPS
Price
$7.12
HerbsPro · 🌾 Vitamin B1
CPS
Price
$8.43
HerbsPro · 🌾 Vitamin B1
CPS
Price
$5.99
HerbsPro · 🌾 Vitamin B1
CPS
Price
$9.10
HerbsPro · 🌾 Vitamin B1
CPS
Price
$6.65
HerbsPro · 🌾 Vitamin B1
CPS
Price
$10.19
HerbsPro · 🌾 Vitamin B1
CPS
Price
$15.39
HerbsPro · 🌾 Vitamin B1
CPS
Price
$8.59
HerbsPro · 🌾 Vitamin B1
CPS
Price
$8.72
HerbsPro · 🌾 Vitamin B1
CPS
Price
$15.00
Amazon.com · ⚡ Alpha-Lipoic Acid
CPS
Price
$21.99
Vykee Nutrition · Amazon.com · 🌾 Vitamin B1
CPS
Price
$11.36
Life Extension · Amazon.com · 🌾 Vitamin B1
CPS
Price
$0.18
Vitamatic · Amazon.com · 🌾 Vitamin B1
CPS
Price
$0.03
Amazon.com · 🌾 Vitamin B1
CPS
Price
$11.36
Amazon.com · 🌾 Vitamin B1
CPS
Price
$4.83
Pure Encapsulations · Amazon.com · 🌾 Vitamin B1
CPS
Price
$0.62
Amazon.com · 🌾 Vitamin B1
CPS
Price
$0.11
Amazon.com · 🌾 Vitamin B1
CPS
Price
$0.38
Dosage, upper-limit, deficiency and interaction facts are sourced from the NIH Office of Dietary Supplements Vitamin B1 fact sheet. General information, not medical advice.