Calcium Hydroxyapatite

Also known as: calcium carbonate, calcium citrate, calcium phosphate, coral calcium

Most abundant mineral in the body, essential for bone health, muscle contraction, nerve signaling, and blood clotting. Absorption decreases with age.

1000mgRDARecommended Dietary Allowance — the daily intake sufficient for 97-98% of healthy adults. Set by the National Institutes of Health.

2500mgUpper LimitTolerable Upper Intake Level (UL) — the maximum daily dose unlikely to cause adverse health effects. Exceeding this consistently may increase toxicity risk.

3ProductsNumber of supplements in our database that contain this ingredient.

2Health ClaimsNumber of researched health benefits associated with this ingredient, rated by evidence strength (strong/moderate/weak).

4Side EffectsNumber of documented side effects from clinical literature and adverse event reports.

Health Claims & Evidence

strongSupports bone health

Primary structural component of bones. Adequate lifelong intake, combined with vitamin D, helps prevent osteoporosis — supported by extensive clinical evidence.

4 studies on PubMed

Related studies:Automatically retrieved from PubMed based on keyword matching. Some may not directly address the specific claim above.Calcium Hydroxyapatite Combined with Photobiomodulation for Bone Tissue Repair: A Systematic Review.Materials (Basel) (2025) · PMID 40077345 Nutritional strategies for skeletal and cardiovascular health: hard bones, soft arteries, rather than vice versa.Open Heart (2016) · PMID 27042317 3D printing of PEEK and its composite to increase biointerfaces as a biomedical material- A review.Colloids Surf B Biointerfaces (2021) · PMID 33865088

strongSupports muscle function

Essential for muscle contraction through calcium signaling.

3 studies on PubMed

Related studies:Automatically retrieved from PubMed based on keyword matching. Some may not directly address the specific claim above.Collagen Stimulators: Poly-L-Lactic Acid and Calcium Hydroxyl Apatite.Facial Plast Surg Clin North Am (2015) · PMID 26505542 Intramuscular migration of calcific tendinopathy in the rotator cuff: ultrasound appearance and a review of the literature.J Ultrasound (2016) · PMID 27635162 Accelerated atherosclerotic calcification and Monckeberg's sclerosis: a continuum of advanced vascular pathology in chronic kidney disease.Clin J Am Soc Nephrol (2008) · PMID 18667741

Known Side Effects

constipation
bloating
kidney stones with excess intake
possible cardiovascular risk at high doses

Drug Interactions

tetracycline antibiotics
bisphosphonates
thyroid medications
iron supplements

Always consult your healthcare provider before combining supplements with medications.

Products Containing Calcium Hydroxyapatite (3)

California NaturalBone Builder

75 2

1MDOsteoMD

69 3

Ee Essential elementsBone boost