PlainVitamins

Stress B-Complex

by Thorne · capsule · 60 capsules

  • On the market (NIH)
  • UPC 6 93749 00296 3
  • DSLD label 336307
  • Serving 1 capsule
  • 60 servings

Stress B-Complex by Thorne lists 14 ingredients, 14 with an amount per serving of 1 capsule, such as 50 mg of thiamine, 28.6 mg of riboflavin, 80 mg of niacin and 28.4 mg of vitamin B6. Its current label entered the NIH Dietary Supplement Label Database on August 22, 2025.

What is in Stress B-Complex?

Each row as the label prints it, per serving of 1 capsule. 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).

Stress B-Complex: Supplement Facts rows against the market (DSLD label 336307, January 2026 release)
IngredientAmount% DVAmong products listing it
Thiamineas Thiamine Hydrochloride50 mg4,167%Thiamin in Stress B-Complex against 9,830 products50 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg50 mg

Higher than 82% of 9,830 products listing thiamin (median 5 mg). Per day at the most servings: 150 mg.

Riboflavin28.6 mg2,200%Riboflavin in Stress B-Complex against 9,824 products28.6 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg28.6 mg

Higher than 82% of 9,824 products listing riboflavin (median 4 mg). Per day at the most servings: 85.8 mg.

Riboflavin25 mg
Riboflavin 5-Phosphate Sodium3.6 mg
Niacinas Niacinamide80 mg500%Niacin in Stress B-Complex against 12,413 products80 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg80 mg

Higher than 87% of 12,413 products listing niacin (median 20 mg). Per day at the most servings: 240 mg. 6.9 times the adult UL a day.

Vitamin B628.4 mg1,671%Vitamin B6 in Stress B-Complex against 15,277 products28.4 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg28.4 mg

Higher than 82% of 15,277 products listing vitamin B6 (median 6 mg). Per day at the most servings: 85.2 mg.

Pyridoxine Hydrochloride25 mg
Pyridoxal 5-Phosphate3.4 mg
Folate334 mcg DFE84%
Quatrefolicas L-5-Methyltetrahydrofolate200 mcg
Vitamin B12as Methylcobalamin100 mcg4,167%Vitamin B12 in Stress B-Complex against 14,425 products100 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg100 mcg

Higher than 61% of 14,425 products listing vitamin B12 (median 36 mcg). Per day at the most servings: 300 mcg.

Biotin80 mcg267%Biotin in Stress B-Complex against 9,447 products80 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg80 mcg

67% of 9,447 products listing biotin give more (median 200 mcg). Per day at the most servings: 240 mcg.

Pantothenic Acidas Calcium Pantothenate250 mg5,000%Pantothenic Acid (Vitamin B5) in Stress B-Complex against 10,060 products250 mg per serving; the middle half of products list 6 mg to 50 mg, the median 12 mg.DV 5 mg250 mg

Higher than 96% of 10,060 products listing pantothenic acid (vitamin B5) (median 12 mg). Per day at the most servings: 750 mg.

Cholineas Choline Citrate14 mg3%Choline in Stress B-Complex against 4,738 products14 mg per serving; the middle half of products list 18 mg to 100 mg, the median 40 mg.DV 550 mgUL 3,500 mg14 mg

77% of 4,738 products listing choline give more (median 40 mg). Per day at the most servings: 42 mg.

Source: NIH ODS Dietary Supplement Label Database, label 336307 (entered August 22, 2025), 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:

  • At 3 servings a day, the most its directions give, the label lists 240 mg of niacin, 6.9 times the adult Tolerable Upper Intake Level.
  • Its 250 mg of pantothenic acid (vitamin B5) is higher than 96% of the 10,060 pantothenic acid (vitamin B5) products that print an amount; 298 list more.

The NIH database records 1 to 3 servings 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: Take 1 capsule one to three times daily or as recommended by your healthcare practitioner.
Warnings
Tamper evident: Use only if bottle is sealed.
If pregnant, consult your health-care practitioner before using this product.
Allergens and what it does not contain
Gluten free
Storage
Store tightly sealed in a cool, dry place.

Source: label statements in DSLD label 336307.

What else is on the label?

Other ingredients: Hypromellose, Microcrystalline Cellulose, Calcium Laurate, Silicon Dioxide.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Manufactured in the USA Using US & Imported Ingredients NSF Contents Certified. Listed with: NSF certified (contents or GMP) (a seal is the label's claim; the certifier's own list confirms it).

How many labels does Stress B-Complex have?

6 labels are on file under this name since October 25, 2018: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 336307 (current) Entered August 22, 2025 · on the market · 60 capsules · UPC 6 93749 00296 3
  2. Label 284262 Entered May 24, 2023 · off the market March 28, 2025 · 60 capsules · UPC 6 93749 00296 3
  3. Label 260588 Entered October 22, 2021 · off the market November 30, 2022 · 60 capsules · UPC 6 93749 00296 3
  4. Label 204208 Entered June 24, 2019 · off the market October 4, 2021 · 60 capsules · UPC 6 93749 00296 3
  5. Label 181767 Entered November 21, 2018 · off the market March 17, 2018 · 60 capsules · UPC 6 93749 00296 3
  6. Label 181770 Entered October 25, 2018 · off the market October 22, 2018 · 60 capsules · UPC 6 93749 00296 3

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

Who makes it?

The label names Thorne Research, Inc. (manufacturer). All Thorne products.

Where next?