A form of calcium
Calcium phosphate supplements
2,838 calcium products in the NIH label database list calcium as calcium phosphate (14% of the 19,724 calcium products); their median is 108 mg of calcium per serving, against 115 mg across all calcium products (DSLD version 9.4.0, January 2026).
How does calcium phosphate compare with the other forms?
The median amount of calcium per serving in products naming each form; the count in brackets. The amount is the calcium the label gives, as printed (the Supplement Facts row normally states the element; a row named as the compound usually gives the compound's weight and is left out of these figures).
Median calcium per serving by form
Source: Supplement Facts rows and their forms, NIH ODS Dietary Supplement Label Database version 9.4.0, current labels.
- Products
- 2,8382,183 on the market
- Median calcium per serving
- 108 mgall calcium products: 115 mg
- Share of calcium products
- 14%2,838 of 19,724
Is the amount the calcium or the whole calcium phosphate?
A Supplement Facts row normally states the calcium itself (a row like "Calcium (as calcium phosphate)"); a row named as the compound (a row like "Calcium phosphate") usually states the compound's weight, which includes what the calcium is bound to and is larger than the calcium it supplies. The front of a bottle may print either. Of the 2,838 products here, 2,827 give the calcium in its own row (14 of them an amount far outside what other labels list, or one their own %DV disagrees with); 11 give no amount of their own or one in another unit.
The adult Tolerable Upper Intake Level for calcium is 2,500 mg a day; it covers total intake, adults 19-50, 2,000 mg from 51 years. At the most servings their labels direct, 11 of the 2,813 calcium phosphate products with a plausible amount (0.4%) give more than that.
Source: Supplement Facts rows of each product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; upper limit: Institute of Medicine Dietary Reference Intakes (2011) (what counts as plausible).
What else do these products contain?
| Ingredient | Share of these products | Median here | Median, all products |
|---|---|---|---|
| Vitamin B6 | 56% | 6 mg | 6 mg |
| Magnesium | 54% | 100 mg | 86 mg |
| Vitamin C | 54% | 120 mg | 100 mg |
| Vitamin B12 | 52% | 25 mcg | 36 mcg |
| Niacin | 50% | 20 mg | 20 mg |
| Vitamin D | 50% | 10.6 mcg | 15 mcg |
| Zinc | 49% | 12.5 mg | 11 mg |
| Folate | 49% | 400 mcg | 400 mcg |
| Phosphorus | 49% | 76 mg | 90 mg |
| Pantothenic Acid (Vitamin B5) | 47% | 15 mg | 12 mg |
Which products are they?
60 of the 2,838 (on-market products first, the newest label first), ordered by the amount of calcium per serving, largest first; an amount that looks like a slip or a compound's weight comes last, marked.
- Super PakBeverly International1,230 mg
- Bone SolidCountry Life1,011 mg
- OsteoPrime Plus Calcium & MagnesiumNature's Way800 mg
- Colon Cleansing Alternative 1200 mgSunshine Naturals690 mg
- Life Extension Mix Tablets with Extra NiacinLife Extension500 mg
- Vitalizer MenShaklee500 mg
- Calcium + Vitamin D3 Gummies 500 mg Fruit FlavorLIfeable500 mg
- Multivitamin 50 PlusGNC Women's400 mg
- Red Yeast Rice 600 mgWindmill300 mg
- Alfalfa ComplexShaklee300 mg
- Complete Plant-Based Protein Delicious Vanilla FlavorLiveGood247 mg
- Energy & MetabolismGNC Mega Men210 mg
- Sport MultivitaminGNC Mega Men210 mg
- Daily One for Men 50+Windmill210 mg
- Women's Complete MultivitaminNoor Vitamins200 mg
- Natural ChangesNature's Sunshine150 mg
- Advanced Memory FormulaAdvanced Bionutritionals130 mg
- Alive! Men's 50+ Ultra Potency Complete MultivitaminNature's Way130 mg
- Alive! Men's Ultra MultivitaminNature's Way130 mg
- Acid-A-Cal FormulaNature's Way130 mg
- Alive! Women's Ultra MultivitaminNature's Way130 mg
- Daily Multiple Vitamins with MineralsMason Natural130 mg
- Alive! Men's Complete MultivitaminNature's Way130 mg
- Max for Women Iron FreeCountry Life100 mg
- Alive! Women's Gummy Multivitamin Mixed Berry FlavoredNature's Way100 mg
- Alive! Women's Gummy Multivitamin Mixed Berry FlavorNature's Way100 mg
- Super Carb PineappleNutraBio95 mg
- Gut CutVigor Labs92 mg
- Multi-Vitamin Elite P.M.Thorne85 mg
- P.m.Thorne85 mg
- A.m.Thorne75 mg
- Co-Q10 100 mgWindmill70 mg
- Biotin 1,000 mcgNatrol66 mg
- Biotin 10,000 mcgNatrol66 mg
- Co-Q10 200 mgWindmill65 mg
- DIMension 3XYMOGEN62 mg
- Reload Recovery Matrix Passion FruitNutraBio60 mg
- Timed Release Melatonin 10 mgWindmill60 mg
- Reload Recovery Matrix Kiwi StrawberryNutraBio60 mg
- B Complex with Choline & InositolWindmill60 mg
- ACES+ZnCarlson56 mg
- 5-HTP 200 mg Time ReleaseNatrol55 mg
- Amino SupportKirkman52 mg
- AprozymeDNA Dynamic Nutritional Associates50 mg
- Alpha Lipoic Acid 300 mgCarlson39 mg
- Biotin 5,000 mcgWindmill30 mg
- Magnesium Citrate 400 mgWindmill30 mg
- Bigger By The DayRich Piana 5% Nutrition29 mg
- Alive! Women's Gummy Multivitamin Zero Sugar Strawberry FlavoredNature's Way26 mg
- Chelated Chromium 200 mcgCarlson26 mg
- Zinc 15 mgCarlson26 mg
- Quercetin Complex 625 mgMason Natural25 mg
- Biotin 10,000 mcgWindmill25 mg
- Tri-BCarlson24 mg
- Advanced Melatonin 10 mg Time ReleaseNatrol23 mg
- Natural Digestive EnzymesCarlson22 mg
- Mentality Nootropic Energy & FocusRich Piana 5% Nutrition20 mg
- Alive! Kids Chewable Multivitamin Orange & BerryNature's Way19.5 mg
- Daily Bladder ComfortMason Natural15 mg
- Nutriboost VanillaP2Life
Source: NIH ODS Dietary Supplement Label Database version 9.4.0; the form each label names for its row. Daily Values: the FDA's Daily Value page.
Which brands make them?
Windmill Natural Vitamins (79), Bronson (78), Nature's Way (67), The Vitamin Shoppe (61), Indiana Botanic Gardens (55), Mason Natural (47), Emergen-C (46), Source Naturals (45), 21st Century (42), Windmill (41).