B-12 500 mcg
by 21st Century · tablet or pill · 110 tablets
- On the market (NIH)
- UPC 7 40985 22309 3
- DSLD label 205866
- Serving 1 tablet
B-12 500 mcg by 21st Century lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 500 mcg of vitamin B12 and 100 mg of calcium. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2019.
What is in B-12 500 mcg?
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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin B12as CyanocobalaminVitamin B-12 (Form: as Cyanocobalamin) | 500 mcg | 20,833% | Higher than 82% of 14,425 products listing vitamin B12 (median 36 mcg). |
| Calciumas Calcium CarbonateCalcium (Form: as Calcium Carbonate) | 100 mg | 8% | 53% of 17,831 products listing calcium give more (median 115 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 205866 (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?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
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.
- B12 Cyanocobalamin 500 mcgWindmill Natural Vitamins same ingredients
- B-12 (Cyanocobalamin) 500 mcgWindmill Natural Vitamins · off the market same ingredients
- Vitamin B12 500 mcgNature Made same ingredients
- Vitamin B12 500 mcgSolgar same ingredients
- B-12 500 mcgMason Natural same ingredients
- Prolonged Release B-12 1000 mcg21st Century · off the market same ingredients
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.
- 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.
- Allergens and what it does not contain
- No added Sugar, Yeast, Preservatives, Artificial Flavors or Colors.
- Gluten free
- Storage
- Store at room temperature.
Source: label statements in DSLD label 205866.
What else is on the label?
Other ingredients: Cellulose, Maltodextrin, Stearic Acid, Croscarmellose Sodium, 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 B-12 500 mcg have?
3 labels are on file under this name since April 25, 2013: other sizes, label designs and reformulations. The current one leads this page.
- Label 233358 Entered August 23, 2020 · off the market August 5, 2020 · 110 tablets · UPC 7 40985 22309 3
- Label 205866 (current) Entered August 23, 2019 · on the market · 110 tablets · UPC 7 40985 22309 3
- Label 20648 Entered April 25, 2013 · off the market March 14, 2019 · 110 tablets · UPC 7 40985 22309 3
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.