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Muscle function, nerve function, energy metabolism, electrolyte balance
Adults with low dietary magnesium intake or active individuals seeking daily mineral support.
Take 1 capsule once daily with 8–12 oz of water; taking with food may improve tolerance.
Non-GMO; Gluten-Free
Magnesium serves as a cofactor for hundreds of enzymes involved in energy production, muscle and nerve function, and electrolyte balance.
Caution: May cause loose stools in some people, especially at higher intakes; take with food and reduce dose if sensitive.
Label Warning: For adults 18 years and over. Consult a healthcare professional before use if pregnant or breastfeeding, taking medication, or have a medical condition.
Who should be cautious: People with kidney concerns or on medications that may interact with minerals, such as certain antibiotics or thyroid medicines, may need extra caution and spacing of doses. Those with heart rhythm concerns or on diuretics should discuss use with a healthcare professional.
Storage: Store in a cool, dry place.
This product is guaranteed authentic and backed by our easy returns and refunds policy. Details
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We believe supplements should be simple, transparent, and accessible. That’s why Nutricost focuses on quality ingredients, clear labeling, and prices that make sense — without unnecessary fillers or inflated costs.
Every product is made to support everyday routines, backed by third party testing and a commitment to consistency you can trust.
‡Nutricost Extra-Strength Magnesium Complex contains 100% more magnesium (500 mg/serving) than Nutricost Regular-Strength Magnesium Complex (250 mg/serving).
As a dietary supplement, take 1 capsule daily with 8-12 oz of water or as directed by your healthcare professional.
Gelatine capsule, magnesium stearate (vegetable source), microcrystalline cellulose, silica.
Made and quality tested in the UK with globally sourced ingredients.
For healthy individuals aged 18 years and over. Consult a healthcare professional before use if you are pregnant or breastfeeding, taking medication, or have a medical condition. Keep out of the reach of children. Do not use if the safety seal is broken or missing.
Store in a cool, dry place.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally be despatched with alternative packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb. This website has been machine translated as a courtesy to customers. iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
| Supplement information | ||
| Serving size: one capsule | ||
| Servings per container:240 | ||
| Amount per serving | %DV | |
| Magnesium (as magnesium oxide, magnesium citrate, magnesium glycinate) | 500 mg | 119% |
