Oyster Shell Calcium 250 +D
by 21st Century · tablet or pill · 90 tablets
- On the market (NIH)
- UPC 7 40985 22302 4
- DSLD label 11094
- Serving 2 tablets
- 45 servings
Oyster Shell Calcium 250 +D by 21st Century lists 2 ingredients, 2 with an amount per serving of 2 tablets, such as 250 IU (6.25 mcg) of vitamin D3 and 500 mg of calcium. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2012.
What is in Oyster Shell Calcium 250 +D?
Each row as the label prints it, per serving of 2 tablets. 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 D3as Cholecalciferol | 250 IU (6.25 mcg) | 60% | 82% of 14,175 products listing vitamin D give more (median 15 mcg). |
| Calciumas OysterCalcium (Form: from Oyster PlantPart: shell) | 500 mg | 50% | Higher than 85% of 17,831 products listing calcium (median 115 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 11094 (entered July 25, 2012), 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.
- Eggshell Calcium With Vitamin D-3Swanson Ultra · off the market same ingredients
- Oyster Shell Calcium With Vitamin D 500 mgWindmill · off the market same ingredients
- Oyster Shell Calcium 500 mg With Vitamin DWindmill · off the market same ingredients
- Calcium 500 With DSunmark same ingredients
- Natural Oyster Shell Calcium 500 mg With Vitamin DLongs Wellness · off the market same ingredients
- Natural Calcium 500 mg With DSunmark 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 up to (2) tablets 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
- No added Sugar, Salt, Yeast, Preservatives or Artificial Flavors.
- Storage
- Store at room temperature.
Source: label statements in DSLD label 11094.
What else is on the label?
Other ingredients: Croscarmellose Sodium, Stearic Acid, Cellulose, Magnesium Stearate.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): MADE IN USA.
How many labels does Oyster Shell Calcium 250 +D have?
One label is on file, entered on July 25, 2012.
- Label 11094 (current) Entered July 25, 2012 · on the market · 90 tablets · UPC 7 40985 22302 4
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.