Is Boron Safe with Calcium carbonate?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Boron supplementation at 3 mg/day may complement calcium carbonate therapy by reducing urinary calcium and magnesium losses. No dose adjustment of calcium is typically needed, but inform your healthcare provider about combined use.
Why this interaction occurs
Boron has been shown in clinical studies to reduce urinary excretion of calcium and magnesium, potentially enhancing the efficacy of calcium supplementation for bone health. Boron also influences estrogen and Vitamin D metabolism, which are central to calcium regulation. This is generally a favorable interaction, though evidence remains limited and high boron doses above 20 mg/day may have hormonal effects.
Evidence
Evidence level: limited.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 914,008 reports mentioning Calcium carbonate. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Calcium carbonate + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Boron interactions → · All Calcium carbonate interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.