PlainVitamins

High Potency B-1 500 mg

by Source Naturals · tablet or pill · 100 tablets

  • On the market (NIH)
  • UPC 0 21078 00888 0
  • DSLD label 295816
  • Serving 1 tablet
  • 100 servings

High Potency B-1 500 mg by Source Naturals lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 500 mg of thiamine and 100 mg of magnesium. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2023.

What is in High Potency B-1 500 mg?

Each row as the label prints it, per serving of 1 tablet. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

High Potency B-1 500 mg: Supplement Facts rows against the market (DSLD label 295816, January 2026 release)
IngredientAmount% DVAmong products listing it
Thiamineas Vitamin B1500 mg33,333%Thiamin in High Potency B-1 500 mg against 9,830 products500 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg500 mg

Higher than over 99% of 9,830 products listing thiamin (median 5 mg).

Magnesiumas Magnesium Citrate, Magnesium Malate, Magnesium Oxide100 mg25%Magnesium in High Potency B-1 500 mg against 14,003 products100 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg100 mg

Higher than 51% of 14,003 products listing magnesium (median 86 mg).

Source: NIH ODS Dietary Supplement Label Database, label 295816 (entered August 23, 2023), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • Its 500 mg of thiamin is higher than over 99% of the 9,830 thiamin products that print an amount; 7 list more.

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

1 product lists the very same ingredients; the nearest amounts come first.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Suggested Use: 1 tablet daily.
Warnings
Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.
Do not use if either tamper-evident seal is broken or missing.
Keep out of the reach of children.
Allergens and what it does not contain
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

Source: label statements in DSLD label 295816.

What else is on the label?

Other ingredients: Stearic Acid, modified Cellulose Gum, Acacia Gum, Magnesium Stearate, Silica.

How many labels does High Potency B-1 500 mg have?

4 labels are on file under this name since February 25, 2019: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 295816 (current) Entered August 23, 2023 · on the market · 100 tablets · UPC 0 21078 00888 0
  2. Label 273008 Entered August 23, 2022 · off the market July 6, 2022 · 100 tablets · UPC 0 21078 00888 0
  3. Label 185229 Entered February 25, 2019 · off the market December 22, 2021 · 100 tablets · UPC 0 21078 00888 0
  4. Label 185219 Entered February 25, 2019 · on the market · 50 tablets · UPC 0 21078 00887 3

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Source Naturals, Inc. (distributor), Santa Cruz, CA. All Source Naturals products.

Where next?