Magnesium is a moderate-risk supplementwith an RDA of 420 mg and a safe upper limit (UL) of 350 mg per day according to FDA standards. CNS lists a RDA of 330 mg with the same UL; MHLW lists a RDA of 340 mg with the same UL. It has 3 known interactions with other supplements including calcium, calcium, vitamin b6. Use NutriAudit to check if your supplement stack keeps this ingredient within safe limits.
Magnesium sits in the Major Minerals category. This page consolidates 5 regional standards, and the limits vary enough that you should not treat one region's rule as universal.
It also has 3 known interactions, so the question is not just the label dose but whether the rest of your stack adds extra risk.
Excess magnesium often causes diarrhea; very high doses can affect heart rhythm in susceptible people.
| Region | Organization | RDA | Upper Limit (UL) | Unit |
|---|---|---|---|---|
| 🇺🇸 United States | FDA | 420 | 350 | mg |
| 🇪🇺 Europe | EFSA | 420 | 350 | mg |
| 🇦🇺 Australia | TGA | 420 | 350 | mg |
| 🇨🇳 China | CNS | 330 | 350 | mg |
| 🇯🇵 Japan | MHLW | 340 | 350 | mg |
RDA = Recommended Daily Allowance (adequate intake for most adults). UL = Tolerable Upper Intake Level (maximum safe daily amount).
Magnesium and calcium work together; ideal ratio is 1:2 (Mg:Ca).
Balance your magnesium and calcium intake.
Calcium to magnesium ratio should be around 2:1 for optimal absorption.
Check your calcium:magnesium ratio.
Vitamin B6 and magnesium work synergistically (positive interaction).
Taking together may enhance effectiveness.
First match your product label against the dose table above, then check whether the known interaction list includes anything in your current stack.
If you are taking multiple supplements, the safest approach is usually to audit the whole stack instead of judging a single bottle in isolation.
The safe upper limit (UL) for Magnesium is 350mg per day according to FDA. Exceeding this amount regularly may increase the risk of adverse effects.
The RDA for Magnesium is 420mg per day for most adults. This amount is sufficient to meet the needs of 97-98% of healthy individuals.
Yes, Magnesium has 3 known interactions with other supplements. Magnesium and calcium work together; ideal ratio is 1:2 (Mg:Ca).
Check if your supplement stack keeps Magnesium within safe limits.
Audit My SupplementsDisclaimer: NutriAudit is a decision-support tool designed to help you review your supplement stack for potential duplicate, conflicting, or excessive ingredients. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making changes to your supplement routine, especially if you are pregnant, nursing, taking medications, or have a medical condition.
Based on reference standards from FDA, EFSA, TGA, and MHLW.