21st Century Calcium 600 mg Tablets 400 Count
- 600 mg calcium carbonate per tablet
- 400 uncoated tablets
- Immediate release
- Vegan, gluten free, no artificial flavors
- Bone strength support, men and women
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A large, plain calcium carbonate tablet bottle for long-term daily use. The tablets are uncoated and the listing gives no serving size.
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ASIN: B00M5TZ1F8Model: Calcium 600 mgCategory: Calcium Supplements
Overview
Taking one of these tablets delivers calcium carbonate as an uncoated, immediate release pill. The big bottle is meant for adults, men and women, who want bone strength support.
A big count gives months of supply, and the vegan and gluten free tags suit plant based diets. The limitation is the uncoated tablet, which can feel chalky to some, and the listing does not mention vitamin D or other cofactors.
Who it's for
Works for a man or woman who takes calcium every day and prefers a plain, vegan friendly tablet. People who dislike chalky uncoated pills, or need a combined calcium and vitamin D product, should pass.
Pros and cons
- Bulk bottle for months of use
- Vegan friendly and gluten free
- No artificial flavors
- Uncoated tablet can feel chalky
- Serving size not listed
- Calcium only, no vitamin D
Performance notes
Calcium carbonate dissolves best with stomach acid, so taking the tablet with a meal helps absorption. The immediate release design means the dose becomes available at once rather than over hours.
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 | |
| Pill Coating | Uncoated |
| Material Type Free | Gluten Free, No Artificial Flavors |
| Included components | |
| Unit Count | 400 tablets |
| Other details | |
| Primary Supplement Type | Calcium carbonate |
| Diet Type | Gluten free, vegan |
| Item Form | Tablet |
| Concentration | 600 mg |
| Dose Release Method | Immediate release |
| Flavor | Unflavored |
| Item Nype Name | Calcium Supplement |
| Product Benefits | Bone Strength |
| Supplement Formulation | Individual Supplement |
Frequently asked questions
Is 21st Century Calcium 600 mg suitable for vegans?
The diet field lists vegan and gluten free, and the title adds Non-GMO.
Can men and women both take this calcium?
The title says suitable for men and women, and the age range is listed as adult.
Does 21st Century Calcium include vitamin D?
No. The listing names calcium carbonate only and does not mention vitamin D.