21st Century Calcium 600 mg Tablets 400 Count
- Flavor: Unflavored
- Primary Supplement Type: Calcium
- Diet Type: Gluten Free, Vegan
- Number Of Items: 1
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
For a plain calcium carbonate tablet with a long supply, this delivers the basics without added extras.
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ASIN: B00M5TZ1F8Model: Calcium 600 mgCategory: Calcium Supplements
Overview
21st Century's calcium carbonate tablet provides 600 mg of calcium per tablet, 400 tablets per bottle, formulated vegan-friendly, non-GMO and gluten free for general bone strength support in men and women.
Calcium carbonate is the most concentrated and typically least expensive form of calcium, but it is best absorbed when taken with food since digestion relies on stomach acid. No listing details point to added vitamin D or magnesium in this particular formula.
- 600 mg calcium carbonate per tablet
- 400 tablets per bottle
- Non-GMO and gluten free
- Vegan-friendly formula
Who it's for
For people who want a plain, no-frills calcium tablet for general bone support and do not need it combined with vitamin D or magnesium. Not for those wanting a combination bone-health formula in a single tablet.
Pros and cons
- 400-tablet count offers a long supply
- Non-GMO and gluten free
- No added vitamin D or magnesium in this formula
- Best absorbed only with food
Performance notes
Calcium carbonate delivers a high percentage of elemental calcium per tablet but works best when taken alongside a meal, since the body needs stomach acid to break the compound down for absorption.
Specifications
| Brand | 21st Century |
|---|---|
| Model | Calcium 600 mg |
| Dimensions & fit | |
| Item Weight | 1.7 pounds |
| Package Size Name | Economy Pack (400 Days Supply) |
| Capacity & performance | |
| Age Range Description | Adult |
| Construction & materials | |
| Material Type Free | Gluten Free, No Artificial Flavors |
| Pill Coating | Uncoated |
| Included components | |
| Unit Count | 400 |
| Other details | |
| Flavor | Unflavored |
| Primary Supplement Type | Calcium |
| Diet Type | Gluten Free, Vegan |
| Number Of Items | 1 |
| Item Form | Tablet |
| Product Benefits | Bone Strength |
| Item Highlight | Calcium Carbonate, Compare VS. Caltrate® 600, Bone Strength & Density Support, Vegan-Friendly, For Men & Women |
| Allergen Information | Gluten Free |
| Supplement Formulation | Individual Supplement |
| Concentration | 600 Mg |
| Dose Release Method | Immediate Release |
| Item Nype Name | Calcium Supplement |
Frequently asked questions
How much calcium is in each 21st Century Calcium tablet (model 27534)?
Each tablet provides 600 mg of calcium as calcium carbonate.
How many tablets come in a bottle of 21st Century Calcium?
The bottle contains 400 tablets.
Is 21st Century Calcium vegan-friendly?
Yes, it is marketed as a vegan-friendly, non-GMO and gluten free formula.