PlainVitamins

B-1 100 mg

by Source Naturals · tablet or pill · 100 tablets

  • On the market (NIH)
  • UPC 0 21078 00407 3
  • DSLD label 272717
  • Serving 1 tablet
  • 100 servings

B-1 100 mg by Source Naturals lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 100 mg of thiamine and 35 mg of calcium. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2022.

What is in B-1 100 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).

B-1 100 mg: Supplement Facts rows against the market (DSLD label 272717, January 2026 release)
IngredientAmount% DVAmong products listing it
Thiamineas Vitamin B1100 mg8,333%Thiamin in B-1 100 mg against 9,830 products100 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg100 mg

Higher than 94% of 9,830 products listing thiamin (median 5 mg).

Calciumas Dibasic Calcium Phosphate35 mg3%Calcium in B-1 100 mg against 17,831 products35 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg35 mg

82% of 17,831 products listing calcium give more (median 115 mg).

Source: NIH ODS Dietary Supplement Label Database, label 272717 (entered August 23, 2022), 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 100 mg of thiamin is higher than 94% of the 9,830 thiamin products that print an amount; 163 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?

6 products list 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.

Source: label statements in DSLD label 272717.

What else is on the label?

Other ingredients: Dibasic Calcium Phosphate, Microcrystalline Cellulose, Stearic Acid, modified Cellulose Gum, Silica.

How many labels does B-1 100 mg have?

3 labels are on file under this name since December 22, 2019: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 272717 (current) Entered August 23, 2022 · on the market · 100 tablets · UPC 0 21078 00407 3
  2. Label 211767 Entered January 25, 2020 · on the market · 250 tablets · UPC 0 21078 00408 0
  3. Label 211753 Entered December 22, 2019 · off the market December 22, 2021 · 100 tablets · UPC 0 21078 00407 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?