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Magnesium

US Daily Value for adults: 420 mg · unit on labels: mg

Reference intakes

Value	United States	China	European Union
Label reference valueBasis of the % on labels, fixed by each regulation; not a recommended intake	420 mgDV · Adults and children 4+¹	300 mgNRV³	375 mgNRV⁵
Recommended intake, adults	400 mg (men 19–30), 420 mg (men 31+); 310 mg (women 19–30), 320 mg (women 31+)RDA · Adults 19+²	330 mg (18–29), 320 mg (30–64), 310 mg (65–74), 300 mg (75+)RNI · Adults 18+⁴	350 mg (men), 300 mg (women)AI⁶
Upper intake level	350 mg (supplemental magnesium)UL · Adults 19+²	Not listed	250 mg (supplemental magnesium)UL⁷

FDA, 21 CFR 101.9(c)(8)(iv), Daily Values for adults and children 4 years and older
NIH Office of Dietary Supplements, Magnesium fact sheet for health professionals (2026)
GB 28050-2011 General rules for nutrition labelling of prepackaged foods, Appendix A nutrient reference values (NRV); value unchanged in GB 28050-2025, Appendix A (published 16 March 2025, in force 16 March 2027) (2025)
Chinese Nutrition Society, Chinese Dietary Reference Intakes (DRIs 2023) (2023)
Regulation (EU) No 1169/2011, Annex XIII Part A, nutrient reference values (consolidated text) (2011)
EFSA NDA Panel, Scientific Opinion on Dietary Reference Values for magnesium (2015)
EFSA, Tolerable upper intake levels for vitamins and minerals (Scientific Committee on Food / NDA Panel) (2006)

Label values (DV, NRV) are the reference points behind the percentages on labels. Recommended intakes and upper levels are quoted from the bodies named; they vary by age, sex and life stage, and they are not advice.