21st Century Calcium Citrate + D3 Petites Coated Tablets 200 ea
- Calcium
- Tablet
- Calcium
- 200
- More reviewed than 68%
A large-count, smaller-pill calcium citrate and D3 tablet from a long-running mainstream brand, a practical basic choice for bone strength support.
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How it ranks among the 107 calcium we track
4.4★ across 3,500 Amazon ratings, Bayesian-smoothed toward the category average.
3,500 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
2,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 107 calcium we track - how the scorecard works · full calcium data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
21st Century's Calcium Citrate + D3 Petites pack calcium citrate with vitamin D3 into small, coated tablets, sold in a 200 count bottle aimed at bone strength support.
The Petites naming points to a smaller tablet size than standard calcium tablets, a detail that matters since calcium supplements are often criticized for being large and hard to swallow. Calcium citrate, rather than calcium carbonate, is generally easier to absorb without food, which the D3 pairing supports for bone health.
- Calcium citrate plus vitamin D3
- 200 coated tablets per bottle
- Smaller Petites tablet size
- Gluten free, unflavored
Who it's for
Fits adults who want a straightforward calcium and D3 tablet in a smaller pill size and a large 200 count bottle. Less suited to anyone wanting a flavored chewable or a combined multi-ingredient bone formula.
Strengths and trade-offs
Drawn from this product's published specifications.
- 200 tablets per bottle, a long-lasting supply
- Smaller coated tablet size
- Calcium citrate pairs with D3 for absorption
- 4.4 rating is on the lower end for this batch
- No seller description detailing exact serving size
Performance notes
The 200 tablet count gives a long runway even at a multi-tablet daily serving, common for calcium products since the mineral is bulky and often split across several tablets. The formula is gluten free and unflavored, coated for easier swallowing per the Petites name.
Specifications
| Brand | 21st |
|---|---|
| Model | 27709 |
| Form | Tablet |
| Supplement Type | Calcium |
| Count | 200 |
| Benefits | Bone Strength |
| Flavor | Unflavored |
| Diet | Gluten Free |
| Allergens | Gluten Free |
Other 21st calcium
How it compares
This product against the closest alternatives we track in calcium.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| 21st Century Calcium Citrate + D3 Petites Coated Tablets 200 eaThis product | 4.4 / 5 | 3,500 | 4.4 / 5 |
| Nature Made Calcium Magnesium Zinc with Vitamin D3NATURE | 4.8 / 5 | 19,900 | 4.7 / 5 |
| Nature's Bounty Calcium Magnesium & Zinc CapletsNature's | 4.7 / 5 | 23,000 | 4.6 / 5 |
| Caltrate 600 Plus D3 Calcium and Vitamin D Supplement TabletsCaltrate | 4.7 / 5 | 16,400 | 4.6 / 5 |
| Citracal Slow Release- Calcium 1200 mg with Vitamin D3Citracal | 4.7 / 5 | 11,909 | 4.6 / 5 |
Similar calcium from other brands
Questions about the 21st 27709
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What form of calcium does this use?
It uses calcium citrate, paired with vitamin D3.
Why are these called Petites?
The tablets are sized smaller than standard calcium tablets for easier swallowing.
How many tablets come in a bottle?
The bottle contains 200 coated tablets.