Excessive calcium supplementation can cause hypercalcemia, kidney stones, and interfere with absorption of other minerals. Learn the safe upper limits and warning signs.
Very high calcium may increase kidney stone risk and interfere with absorption of other minerals.
| Standard | RDA | Upper Limit (UL) |
|---|---|---|
| US (FDA) | 1000 mg | 2500 mg |
| EU (EFSA) | 1000 mg | 2500 mg |
| AU (TGA) | 1000 mg | 2500 mg |
| CN (CNS) | 800 mg | 2000 mg |
| JP (MHLW) | 800 mg | 2300 mg |
RDA = Recommended Dietary Allowance. UL = Tolerable Upper Intake Level. Exceeding the UL long-term may cause the toxicity symptoms described above.
Yes. Excess calcium from supplements (not food) increases kidney stone risk. The UL is 2,500 mg/day for adults under 50 and 2,000 mg/day for those over 50. Getting calcium from food sources does not carry the same stone risk.
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Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.