Reviewed and updated September 12, 2026 · Alurevia Editorial Team
Daily magnesium needs depend on age, sex and life stage, and the recommended intake is not the same thing as the upper limit for magnesium from supplements. That distinction matters when reading magnesium labels.
What is the recommended daily amount of magnesium?
According to the NIH Office of Dietary Supplements, recommended dietary allowances for adults generally range from 310 to 420mg per day, depending on age and sex. Pregnancy can change the recommended intake.
These recommendations refer to total magnesium intake from food, beverages and supplements combined.
What is the upper limit for magnesium from supplements?
The Food and Nutrition Board sets a tolerable upper intake level of 350mg per day for supplemental magnesium in adults. This upper limit applies to magnesium from dietary supplements and medications, not magnesium naturally present in food.
The limit is primarily based on gastrointestinal effects such as diarrhea that become more common as supplemental intake rises.
Why can a supplement contain more than 350mg?
The upper limit is a population-level safety reference, not a legal maximum amount that can appear in every product. A supplement may provide more than 350mg, but that makes professional guidance more important rather than less.
How does Alurevia compare?
Alurevia Magnesium Complex provides 500mg elemental magnesium per capsule. That is above the adult supplemental upper limit of 350mg/day. The product page states this clearly.
Do not combine it with other magnesium-containing supplements simply to increase the total dose. Speak with a healthcare professional about whether the product and dose are appropriate for you, especially if you have kidney disease, take prescription medicines, are pregnant or nursing, or use other magnesium products.
Food magnesium and supplemental magnesium are treated differently
The 350mg upper limit does not include magnesium naturally found in foods. Food sources are therefore not capped in the same way in the NIH guidance.
Frequently asked questions
Is 400mg of magnesium per day too much?
It depends on whether the amount comes from food, supplements or both, as well as individual circumstances. The adult upper limit specifically for magnesium from supplements is 350mg/day. Seek professional advice before regularly exceeding it.
Is 500mg of magnesium a high supplemental dose?
Yes. 500mg of elemental magnesium from a supplement is above the adult supplemental upper limit of 350mg/day.
Does the Daily Value equal the upper limit?
No. The Daily Value and the supplemental upper limit serve different purposes. The Daily Value is used for nutrition labelling; the upper limit is a safety reference for supplemental intake.
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Source
National Institutes of Health, Office of Dietary Supplements: Magnesium Fact Sheet for Health Professionals.
This article is general educational information and is not medical advice.