# Calcium Formate **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/calcium-formate **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-04-04 **Evidence Score:** 2 / 10 **Category:** Mineral **Also Known As:** Ca(HCO₂)₂, Calcium diformate, Formic acid calcium salt, E238, Calcium methanoate, Calcoform ## Overview Calcium formate is an inorganic calcium salt (Ca(HCOO)₂) composed of calcium ions and formate anions, primarily used as an industrial cement additive and animal feed preservative registered as E238. It provides bioavailable calcium ions upon dissolution in aqueous environments but has no documented human clinical trials supporting its use as a dietary supplement. ## Health Benefits • No established health benefits - no human clinical trials identified in the research • Industrial compound primarily used as cement additive and animal feed preservative (E238) • Provides calcium ions upon dissolution but lacks biomedical evidence • Not approved for human food consumption according to regulatory data • Absence of documented therapeutic applications in medical literature ## Mechanism of Action Upon dissolution, calcium formate dissociates into Ca²⁺ ions and formate anions (HCOO⁻); the calcium ions can theoretically participate in standard calcium-dependent pathways including activation of calmodulin, regulation of voltage-gated calcium channels, and [bone mineralization](/ingredients/condition/bone-health) via hydroxyapatite crystal formation. The formate anion is metabolized via folate-dependent one-carbon [metabolism](/ingredients/condition/weight-management), where it can be converted to 10-formyl-tetrahydrofolate by 10-formyltetrahydrofolate synthetase, though this pathway has not been studied in the context of oral calcium formate supplementation in humans. No receptor-binding studies or enzyme-interaction data specific to calcium formate as a supplement exist in peer-reviewed literature. ## Clinical Summary No human clinical trials investigating calcium formate as a dietary supplement have been identified in PubMed, ClinicalTrials.gov, or Cochrane databases as of the current review. Animal feed research, primarily in poultry and swine, has examined calcium formate as a preservative and calcium source, but these studies focus on [antimicrobial](/ingredients/condition/immune-support) preservation and growth parameters rather than bioavailability endpoints comparable to human supplementation. In contrast to well-studied calcium forms such as calcium carbonate and calcium citrate, which have undergone randomized controlled trials with hundreds of participants measuring [bone mineral density](/ingredients/condition/bone-health) and fracture risk, calcium formate has no equivalent human evidence base. The overall evidence for calcium formate as a human health supplement is absent, making any efficacy claims unsupported. ## Nutritional Profile Calcium Formate (Ca(HCOO)₂) is an inorganic calcium salt with molecular weight of 130.11 g/mol. Elemental composition: calcium content approximately 30.7% by weight, carbon 18.5%, hydrogen 1.5%, oxygen 49.2%. As a mineral compound, it contains no macronutrients (zero protein, zero fat, zero carbohydrates, zero dietary fiber). No vitamins present. Primary mineral component is calcium ions released upon dissolution; a 1g dose theoretically yields approximately 307mg elemental calcium, which is comparatively high by weight relative to common calcium supplements (calcium carbonate yields ~400mg/g, calcium citrate ~211mg/g). The formate anion (HCOO⁻) is the conjugate base of formic acid and is metabolized in mammals via folate-dependent one-carbon [metabolism](/ingredients/condition/weight-management) pathways, ultimately oxidized to CO₂ and water; however, at industrial exposure levels formate accumulates and is toxic. Bioavailability of calcium from this salt is not established in human studies. No bioactive compounds, [antioxidant](/ingredients/condition/antioxidant)s, phytonutrients, or essential fatty acids are present. Caloric value is zero. Not classified as a food-grade nutrient; no Recommended Dietary Allowance or Tolerable Upper Intake Level has been established for calcium formate specifically in human nutrition contexts. ## Dosage & Preparation No clinically studied dosage ranges exist for calcium formate in humans. The compound is used as an animal feed preservative but has no standardized forms or established protocols for human consumption. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Calcium formate is not approved for human food consumption in the European Union or the United States, and its safety profile in humans at supplemental doses has not been formally evaluated in published toxicological or clinical studies. The formate anion at high systemic concentrations is associated with metabolic acidosis and [mitochondrial](/ingredients/condition/energy) cytochrome c oxidase inhibition, as seen in methanol poisoning where formate is a toxic metabolite, though dietary formate exposure from this salt at typical calcium-equivalent doses may differ substantially. Potential drug interactions have not been characterized, but calcium ions broadly can reduce absorption of tetracycline antibiotics, bisphosphonates, fluoroquinolones, and levothyroxine when co-administered. Pregnancy and lactation safety data are entirely absent, and use during these periods cannot be recommended given the lack of human safety evidence. ## Scientific Research No human clinical trials, randomized controlled trials (RCTs), or meta-analyses on calcium formate were identified in the research. PubChem lists general literature but no specific clinical studies (CID 10997), and DrugBank entries provide only chemical data without trial details or PMIDs. ## Historical & Cultural Context No historical or traditional medicinal uses in any systems (Ayurveda, TCM, or others) are documented. Its primary applications have been industrial, particularly as a cement additive and animal feed preservative, rather than medicinal. ## Synergistic Combinations Not applicable - no biomedical use established ## Frequently Asked Questions ### Is calcium formate safe for human consumption? Calcium formate is not approved for human food use in the EU or US and carries the E238 designation restricted to animal feed preservation. No human safety trials exist, and the formate anion—while metabolized at low doses—is a known toxic metabolite at high systemic concentrations, raising theoretical concerns that have not been formally evaluated in a human supplementation context. ### What is calcium formate used for? Calcium formate is primarily used as a concrete and cement setting accelerator in the construction industry and as an antimicrobial preservative (E238) in animal feed for poultry and swine. It is not manufactured or regulated as a human dietary supplement, and its commercial applications are entirely industrial and agricultural. ### How does calcium formate compare to calcium citrate or calcium carbonate? Calcium carbonate and calcium citrate are extensively studied human supplement forms with documented absorption rates (approximately 39% and 35% elemental calcium respectively), randomized controlled trial data on bone mineral density, and established safety profiles. Calcium formate has no comparative bioavailability data in humans, no clinical trial evidence, and is not produced to pharmaceutical or nutraceutical grade standards, making direct comparison impossible with current evidence. ### Does calcium formate have any health benefits? No peer-reviewed human clinical trials have demonstrated health benefits from calcium formate supplementation. While it does dissociate to release calcium ions, which are essential for bone mineralization, neuromuscular function, and enzymatic activity, whether calcium formate delivers these ions comparably to established calcium supplements in humans remains entirely unstudied. ### Can calcium formate interact with medications? Specific interaction studies for calcium formate with pharmaceutical drugs have not been conducted in humans. By extrapolation from known calcium ion chemistry, co-administration could theoretically chelate and reduce absorption of tetracycline antibiotics, fluoroquinolones, bisphosphonates such as alendronate, and levothyroxine; however, these interactions are inferred from other calcium salts and have not been directly tested with calcium formate. ### Is calcium formate approved for human dietary supplements? Calcium formate is not approved for human food or dietary supplement consumption in most regulatory jurisdictions, including the FDA. While it is approved as a food additive (E238) for animal feed preservation in some regions, its use in human supplements lacks regulatory clearance and safety documentation specific to oral human intake. ### What is the difference between calcium formate and other calcium supplement forms? Unlike established calcium supplement forms such as calcium citrate or calcium carbonate, calcium formate has no clinical evidence supporting its use as a human supplement and is primarily an industrial compound. Most calcium formate produced globally is used as a cement additive or animal feed preservative rather than as a nutritional ingredient. ### Why is there limited clinical research on calcium formate for human supplementation? Calcium formate has no established clinical studies in human populations because it was never developed or intended as a nutritional supplement for human consumption. The absence of research reflects its industrial and veterinary applications rather than biomedical research interest, making it unsuitable for evidence-based supplementation recommendations. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*