PlainVitamins

Stress B with Iron

by 21st Century · tablet or pill · 66 tablets

  • On the market (NIH)
  • UPC 7 40985 22342 0
  • DSLD label 205888
  • Serving 1 tablet

Stress B with Iron by 21st Century lists 13 ingredients, 13 with an amount per serving of 1 tablet, such as 500 mg of vitamin C, 14 mg of vitamin E, 10 mg of thiamine and 10 mg of riboflavin. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2019.

What is in Stress B with Iron?

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).

Stress B with Iron: Supplement Facts rows against the market (DSLD label 205888, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid500 mg556%Vitamin C in Stress B with Iron against 18,583 products500 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg500 mg

Higher than 81% of 18,583 products listing vitamin C (median 100 mg).

Vitamin Eas DL-Alpha-Tocopheryl AcetateVitamin E (Form: as DL-Alpha Tocopheryl Acetate)14 mg90%
Thiamineas Thiamine Mononitrate, Vitamin B1Thiamin (Form: as Thiamin Mononitrate) (Alt. Name: B-1)10 mg833%Thiamin in Stress B with Iron against 9,830 products10 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg10 mg

Higher than 59% of 9,830 products listing thiamin (median 5 mg).

Riboflavinas Vitamin B210 mg769%Riboflavin in Stress B with Iron against 9,824 products10 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg10 mg

Higher than 61% of 9,824 products listing riboflavin (median 4 mg).

Niacinas NiacinamideNiacin (Form: as Niacinamide)100 mg625%Niacin in Stress B with Iron against 12,413 products100 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg100 mg

Higher than 88% of 12,413 products listing niacin (median 20 mg). 2.9 times the adult UL a day.

Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl)5 mg294%Vitamin B6 in Stress B with Iron against 15,277 products5 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg5 mg

51% of 15,277 products listing vitamin B6 give more (median 6 mg).

Folate667 mcg DFE167%
Folic Acid400 mcg
Vitamin B12as CyanocobalaminVitamin B-12 (Form: as Cyanocobalamin)12 mcg500%Vitamin B12 in Stress B with Iron against 14,425 products12 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg12 mcg

63% of 14,425 products listing vitamin B12 give more (median 36 mcg).

Biotin45 mcg150%Biotin in Stress B with Iron against 9,447 products45 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg45 mcg

79% of 9,447 products listing biotin give more (median 200 mcg).

Pantothenic Acidas D-Calcium PantothenatePantothenic Acid (Form: as D-Calcium Pantothenate)20 mg400%Pantothenic Acid (Vitamin B5) in Stress B with Iron against 10,060 products20 mg per serving; the middle half of products list 6 mg to 50 mg, the median 12 mg.DV 5 mg20 mg

Higher than 55% of 10,060 products listing pantothenic acid (vitamin B5) (median 12 mg).

Calciumas Calcium Carbonate, Dicalcium PhosphateCalcium (Form: as Calcium Carbonate, & Dicalcium Phosphate)75 mg6%Calcium in Stress B with Iron against 17,831 products75 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg75 mg

64% of 17,831 products listing calcium give more (median 115 mg).

Ironas Ferrous FumarateIron (Form: as Ferrous Fumarate)18 mg100%Iron in Stress B with Iron against 6,910 products18 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg18 mg

Higher than 74% of 6,910 products listing iron (median 5 mg).

Source: NIH ODS Dietary Supplement Label Database, label 205888 (entered August 23, 2019), version 9.4.0. See the label on DSLD. 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 1 serving a day, the most its directions give, the label lists 100 mg of niacin, 2.9 times the adult Tolerable Upper Intake Level.

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
Directions: As a vitamin supplement, adults take one (1) tablet daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage.
Combined with a healthy diet and plenty of rest, 21st Century Stress B helps provide the extra nutritional support your body may need.
Warnings
Do not exceed recommended dosage.
Warning: Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.
Stop use and contact a physician if adverse reactions occur.
Keep out of reach of children.
Do not use if product appears to be tampered with or seal is broken.
Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or poison control center immediately.
Allergens and what it does not contain
No added Yeast, Preservatives or Artificial Flavors.
Gluten free
Storage
Store at room temperature.

Source: label statements in DSLD label 205888.

What else is on the label?

Other ingredients: Starch, Hydroxypropyl Methylcellulose, Contains Less Than 2% of.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Guaranteed quality Laboratory tested.

How many labels does Stress B with Iron have?

3 labels are on file under this name since August 24, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 205888 (current) Entered August 23, 2019 · on the market · 66 tablets · UPC 7 40985 22342 0
  2. Label 43801 Entered March 25, 2015 · off the market June 28, 2019 · 66 tablets
  3. Label 11604 Entered August 24, 2012 · off the market March 12, 2015 · 66 tablets · UPC 7 40985 22342 0

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

Who makes it?

The label names 21st Century HealthCare, Inc. (manufacturer), Tempe, AZ. All 21st Century products.

Where next?