SuppRankedTop 10 calcium brands on Amazon (estimated revenue)
Ranked by estimated monthly revenue from Amazon's Calcium Best Sellers top 100. Updated October 15, 2026.
AlgaeCal is the top-selling calcium brand on Amazon by estimated revenue, at about $759K/mo from 4 products in the Calcium Best Sellers top 100. That is about 24% more than #2 Citracal (~$611K/mo). The list is fragmented: the top 3 brands take about 29% of its estimated sales and the top 10 about 62%, spread across 54 brands in total. The median list price in this top 100 is $21.99, and 20% of the products are gummies. All figures are modeled estimates, not Amazon data.
| # | Brand | Est. revenue/mo |
|---|---|---|
| 1 | AlgaeCal12% share · best #15 | $759K |
| 2 | Citracal9% share · best #5 | $611K |
| 3 | Nature Made7% share · best #2 | $486K |
| 4 | Caltrate7% share · best #7 | $461K |
| 5 | Pure Encapsulations6% share · best #4 | $393K |
| 6 | New Chapter6% share · best #8 | $365K |
| 7 | Nature's Bounty6% share · best #1 | $359K |
| 8 | Bariatric Advantage4% share · best #11 | $230K |
| 9 | NuBest3% share · best #31 | $205K |
| 10 | THORNE2% share · best #19 | $162K |
The top 10, brand by brand
1. AlgaeCal
~$759K/mo est. revenue (12% of this list) and ~9.8K units/mo from 4 products; best position #15. Its highest-ranked product here is ALGAECAL Plus Calcium Supplement for Bone Density, with D3 K2, 120 Caps… at #15. Overall it ranks #170 of 935 brands.
2. Citracal
~$611K/mo est. revenue (9% of this list) and ~31K units/mo from 6 products; best position #5. Its highest-ranked product here is Citracal Slow Release- Calcium 1200 mg with Vitamin D3, Magnesium, Calcium… at #5. Overall it ranks #92 of 935 brands.
3. Nature Made
~$486K/mo est. revenue (7% of this list) and ~36.1K units/mo from 4 products; best position #2. Its highest-ranked product here is Nature Made Calcium 600 mg with Vitamin D3 for Bone Support, 220 Tablets… at #2. Overall it ranks #1 of 935 brands.
4. Caltrate
~$461K/mo est. revenue (7% of this list) and ~24.5K units/mo from 6 products; best position #7. Its highest-ranked product here is Caltrate 600 Plus D3 Vitamin D and Calcium Supplement Tablets, 200 Count… at #7. Overall it ranks #140 of 935 brands.
5. Pure Encapsulations
~$393K/mo est. revenue (6% of this list) and ~12.1K units/mo from 2 products; best position #4. Its highest-ranked product here is Pure Encapsulations Calcium (Citrate), 180 Capsules | Supplement for Bone… at #4. Overall it ranks #7 of 935 brands.
6. New Chapter
~$365K/mo est. revenue (6% of this list) and ~8.7K units/mo from 1 product; best position #8. Its highest-ranked product here is New Chapter Bone Strength Take Care Organic Calcium, 120 Slim Tablets… at #8. Overall it ranks #73 of 935 brands.
7. Nature's Bounty
~$359K/mo est. revenue (6% of this list) and ~39.7K units/mo from 4 products; best position #1. Its highest-ranked product here is Nature's Bounty Calcium 1200mg with 1000 IU Vitamin D3, 120 Count | Bone Health… at #1. Overall it ranks #4 of 935 brands.
8. Bariatric Advantage
~$230K/mo est. revenue (4% of this list) and ~5.2K units/mo from 1 product; best position #11. Its highest-ranked product here is Bariatric Advantage Calcium Citrate Chewy Bites, Assorted Fruit, 90 Ct | 500 mg… at #11. Overall it ranks #457 of 935 brands.
9. NuBest
~$205K/mo est. revenue (3% of this list) and ~3.7K units/mo from 2 products; best position #31. Its highest-ranked product here is NuBest Tall 10+ Growth Support Vitamins for Kids & Teens, 60 Capsules… at #31. Overall it ranks #520 of 935 brands.
10. THORNE
~$162K/mo est. revenue (2% of this list) and ~5.7K units/mo from 2 products; best position #19. Its highest-ranked product here is THORNE Calcium, Chelated DiCalcium Malate Supplement, 120 Capsules | Supports… at #19. Overall it ranks #3 of 935 brands.
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Full Calcium ranking
All 54 brands in the list, ordered by rank strength, plus the top 10 products.
See all Calcium brands →