A form of calcium
Calcium hydroxyapatite supplements
270 calcium products in the NIH label database list calcium as calcium hydroxyapatite (1% of the 19,724 calcium products); their median is 500 mg of calcium per serving, against 115 mg across all calcium products (DSLD version 9.4.0, January 2026).
How does calcium hydroxyapatite 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
- 270188 on the market
- Median calcium per serving
- 500 mgall calcium products: 115 mg
- Share of calcium products
- 1%270 of 19,724
Is the amount the calcium or the whole calcium hydroxyapatite?
A Supplement Facts row normally states the calcium itself (a row like "Calcium (as calcium hydroxyapatite)"); a row named as the compound (a row like "Calcium hydroxyapatite") 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 270 products here, 270 give the calcium in its own row (1 of them an amount far outside what other labels list, or one their own %DV disagrees with).
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, 12 of the 269 calcium hydroxyapatite products with a plausible amount (4.5%) 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 |
|---|---|---|---|
| Magnesium | 82% | 250 mg | 86 mg |
| Vitamin D | 79% | 10 mcg | 15 mcg |
| Phosphorus | 63% | 180 mg | 90 mg |
| Boron | 59% | 1 mg | 1 mg |
| Manganese | 53% | 2 mg | 2 mg |
| Zinc | 47% | 10 mg | 11 mg |
| Copper | 47% | 1 mg | 1 mg |
| Vitamin C | 46% | 120 mg | 100 mg |
| Vitamin K | 44% | 50 mcg | 80 mcg |
| Potassium | 35% | 99 mg | 99 mg |
Which products are they?
60 of the 270 (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.
- OsteoSheath 4Vinco1,221 mg
- Bone SolidCountry Life1,011 mg
- Bone Builder Extra StrengthMetagenics1,010 mg
- Osteo 4000 Calciumchiropractor's blend1,000 mg
- Calcium 1,000 mg Magnesium 500 mg Zinc 25 mg with Vitamin DCountry Life Target-Mins1,000 mg
- Total Mins Iron-free with Boron and Vitamin DCountry Life Target-Mins1,000 mg
- Calcium Magnesium with Vitamin D ComplexCountry Life Target-Mins1,000 mg
- Calcium 1,000 mg Magnesium 500 mg ComplexCountry Life Target-Mins1,000 mg
- Calcium 1,000 mg Magnesium 500 mg with Vitamin D 10 mcg (400 I.U.) ComplexCountry Life Target-Mins1,000 mg
- Bone Maximizer IIIMRM Nutrition1,000 mg
- Osteo Bone HealthEmerald Labs1,000 mg
- Bone ComplexPrimeGENIX900 mg
- OsteoMedicaNuMedica800 mg
- Bone Maximizer Orange FlavoredMRM Nutrition700 mg
- Ultimate Men's Daily PackBurton Nutrition675 mg
- Bone Builder PrimeMetagenics660 mg
- Bone StrengthNOW620 mg
- Bone Builder with MagnesiumMetagenics620 mg
- Bone BuilderMetagenics620 mg
- Bone Builder with BoronMetagenics620 mg
- Bone Builder ActiveMetagenics610 mg
- Bone Reinforcertnvitamins600 mg
- Cal-Mag PlusNutrients for Health600 mg
- OSAplexXYMOGEN550 mg
- Ultimate Bone SupportWoodstock Vitamins550 mg
- Calcium Magnesium CapsCountry Life Target-Mins500 mg
- Calcium 500 mg Magnesium 500 mg Potassium 99 mgCountry Life Target-Mins500 mg
- Cal-Mag 2000Professional Botanicals500 mg
- Alka CalB.E.S.T. Process Alka-Line Supplements500 mg
- Calcium Microcrystalline HydroxyapatiteDouglas Laboratories500 mg
- Bone Builder ForteMetagenics420 mg
- Ossopan MDXYMOGEN400 mg
- Bone Support ComplexNHC Natural Healthy Concepts400 mg
- Ultra BoneUpJarrow Formulas400 mg
- Cal/Mag 2:1 (Malate)Pure Encapsulations390 mg
- Multigenics Intensive CareMetagenics370 mg
- Multigenics Intensive Care without IronMetagenics370 mg
- BoneUpJarrow Formulas333.3 mg
- BoneUp 3 Per DayJarrow Formulas333.3 mg
- OsteoMD1MD Nutrition325 mg
- Calcium Bone Maker ComplexDoctor's Best300 mg
- OsteoBaseOrtho Molecular Products300 mg
- Bone Builder ChewableMetagenics300 mg
- Ossopan 1100XYMOGEN275 mg
- HydroxyCalKaruna272 mg
- Calcium (MCHA)Pure Encapsulations250 mg
- Core Daily 1 for WomenCountry Life224 mg
- M.C.H.C CalciumPriority One Nutritional Supplements200 mg
- 50+ Women's DailyecoNugenics160 mg
- Calcium (MCHA) with MagnesiumPure Encapsulations140 mg
- Mineral XcelNeurobiologix122 mg
- Max For Men Iron FreeCountry Life118 mg
- Core Daily-1 for Men 50+Country Life107 mg
- Max for Women Iron FreeCountry Life100 mg
- MultiMedica for WomenNuMedica100 mg
- ProSoothe IIPure Encapsulations100 mg
- Doc's Best Multivitamin PlusDr. Ron's Ultra-Pure67 mg
- Daily Total One Iron FreeCountry Life20 mg
- Zinc Picolinate 25 mgCountry Life20 mg
- B Cell FormulaEcological Formulas9 mg
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?
Country Life (53), Metagenics (23), Douglas Laboratories (18), Country Life Target-Mins (9), Jarrow Formulas (7), XYMOGEN (6), Ortho Molecular Products (5), NutriCology (5), NOW (4), PureFormulas (4).