Excess calcium from supplements raises kidney stone risk and blocks mineral absorption. UL: 2,500 mg/day (under 50), 2,000 mg/day (over 50). Check your dose.
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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