About
Calcium is an essential dietary mineral required for bone and teeth formation, muscle contraction, nerve transmission, and blood coagulation. It is naturally present in dairy products, leafy vegetables, and legumes, and is widely added to foods as a fortification nutrient in various salt forms (carbonate, citrate, chloride, phosphate, lactate), all of which carry GRAS or approved food-additive status in major jurisdictions.
Safety summary
Calcium is broadly recognised as safe at normal dietary intake levels; JECFA has not specified an Acceptable Daily Intake, reflecting its status as an essential nutrient rather than a chemical additive. Excess supplemental intake above tolerable upper levels (2,000–2,500 mg/day for adults, age-dependent) is associated with kidney stone formation, hypercalciuria, hypercalcemia, and possible soft-tissue calcification. Individuals with chronic kidney disease, post-menopausal women taking high-dose supplements, and those on interacting medications (quinolone antibiotics, dolutegravir, lithium) should exercise particular caution.
Regulatory landscape
| Jurisdiction | Status | Note |
|---|---|---|
| FSANZ (Food Standards Australia New Zealand) (Australia) | Approved | Calcium and its salts are approved food additives and permitted nutrient sources under Food Standards Code Standard 1.3.1 (Food Additives) and Standard 1.3.2 (Vitamins and Minerals). No population UL for calcium has been separately established by FSANZ; Australian/NZ Nutrient Reference Values (2006) align with IOM age-stratified ULs.source |
| EFSA (European Food Safety Authority) (European Union) | Approved | Calcium salts are approved EU food additives listed in Annex II of Regulation (EC) No 1333/2008 (e.g., E170 calcium carbonate, E333 calcium citrates, E341 calcium phosphates, E509 calcium chloride). EFSA's 2015 Scientific Opinion on Dietary Reference Values for calcium did not establish a population-level Tolerable Upper Intake Level, citing insufficient evidence; it set a dietary reference value (adequate intake) of 950 mg/day for adults. Calcium is also listed as an authorised nutrient source for food supplements under Directive 2002/46/EC.source |
| FSSAI (Food Safety and Standards Authority of India) (India) | Approved | Calcium salts including calcium carbonate, calcium chloride, calcium citrate, and calcium phosphates are permitted food additives and nutrient supplements under the Food Safety and Standards (Food Products Standards and Food Additives) Regulations, 2011, and the FSSAI Food Additives Regulations 2018. Calcium is also recognised as a permitted mineral for nutritional fortification under the FSSAI Food Fortification Standards.source |
Who should approach with care
Research citations
- 1FDA. Food Additive Status List — Calcium Carbonate, Calcium Chloride, Calcium Citrate, Calcium Phosphates (21 CFR 182/184), 2026. fda.gov
- 2PubMed. Calcium (Advances in Nutrition, 2019) — PMC6520034, 2019. pmc.ncbi.nlm.nih.gov
- 3EFSA. Scientific Opinion on Dietary Reference Values for calcium (EFSA Journal 2015;13(5):4101), 2015. efsa.onlinelibrary.wiley.com
- 4PubMed. Calcium intake and urinary stone disease (Translational Andrology and Urology, 2014) — PMC4708574, 2014. pmc.ncbi.nlm.nih.gov
- 5other. Dietary Reference Intakes for Calcium and Vitamin D: Tolerable Upper Intake Levels — Calcium and Vitamin D (Institute of Medicine / National Academies, 2011), 2011. ncbi.nlm.nih.gov
- 6FDA. Small Entity Compliance Guide: Health Claims on Calcium and Osteoporosis; and Calcium, Vitamin D, and Osteoporosis (21 CFR 101.72), 2008.
