Prolonged Release B-12 1000 mcg
by 21st Century · tablet or pill · 110 tablets
- Off the market since March 2015 (NIH)
- UPC 7 40985 21104 5
- DSLD label 20649
- Serving 1 tablet
Prolonged Release B-12 1000 mcg by 21st Century lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 1,000 mcg of vitamin B12 and 100 mg of calcium. Its current label entered the NIH Dietary Supplement Label Database on April 25, 2013.
What is in Prolonged Release B-12 1000 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) | 1,000 mcg | 16,667% | Higher than 89% of 14,425 products listing vitamin B12 (median 36 mcg). |
| Calciumas Calcium CarbonateCalcium (Form: as Calcium Carbonate) | 100 mg | 10% | 53% of 17,831 products listing calcium give more (median 115 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 20649 (entered April 25, 2013), 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.
- B-12 1000 mcg21st Century same ingredients
- Extended Release B-12 1000 mcgMason Natural same ingredients
- B-12 1000 mcgMason Natural same ingredients
- B-12 1,000 mcgVitamer Laboratories same ingredients
- Vitamin B-12 1,000 mcgVitaCeutical Labs same ingredients
- B-12 1,000 mcgVillage Vitality · 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: Take one (1) tablet daily with any meal for maximum daily results, or as directed by your healthcare provider. Do not exceed recommended dosage.
- Warnings
- 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
- Gluten Free. No Added Sugar, Salt, Yeast, Preservatives, Artificial Flavors or Colors.
- Storage
- Store at room temperature.
Source: label statements in DSLD label 20649.
What else is on the label?
Other ingredients: Cellulose, Stearic Acid, Hydroxypropyl Methylcellulose, Silicon Dioxide, Magnesium Stearate.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): LABORATORY TESTED GUARANTEED QUALITY.
How many labels does Prolonged Release B-12 1000 mcg have?
2 labels are on file under this name since July 25, 2012: other sizes, label designs and reformulations. The current one leads this page.
- Label 20649 (current) Entered April 25, 2013 · off the market March 12, 2015 · 110 tablets · UPC 7 40985 21104 5
- Label 11030 Entered July 25, 2012 · off the market April 2, 2013 · 110 tablets · UPC 7 40985 21104 5
DSLD also links this label to: B-12 1000 mcg (image difference, same product), B-12 1000 mcg (image difference, same product), B-12 1000 mcg (image difference, same product).
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.