This magnesium delivers 400mg per softgel, but it's **magnesium oxide** — a form your body absorbs at only about 4%. So while 400mg sits at the top of the supplemental range on paper, in practice you're getting a small fraction of that.
Where oxide does work is the gut: the unabsorbed magnesium pulls water into your bowel, which is why it's mainly used for occasional constipation, and why the label warns of diarrhea and caps you at one softgel. That's a real effect, just not the one most people buy magnesium for.
If your goal is sleep, muscle relaxation, or correcting low magnesium, a glycinate or citrate form is far better absorbed. For that goal this falls short; for occasional constipation, it does the job.
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What it does
Magnesium
magnesium oxideBudget
magnesium oxide: Supports normal muscle function; small studies found oxide less well absorbed than citrate, with possible laxative effects.
Ingredients (2)
Calories from Fat
5 Calorie(s)Not in our database
Nutrition
Calories, macros & sodium.
- Calories10 Calorie(s)
- Calories from Fat5 Calorie(s)
- Total Fat0.5 Gram(s)
Other ingredients
Medium Chain Triglyceride OilCarrier
Fractionated oils rich in C8/C10 triglycerides used as neutral carrier or anti-sticking agent
Soy LecithinEmulsifier
Widely used emulsifier derived from soybeans
GelatinCapsule
Protein derived from collagen, used in traditional capsule shells
GlycerinHumectant
Sweet-tasting liquid used in soft capsules and liquids
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
BeeswaxCoating
Natural wax produced by honeybees, used as a coating and binding agent in softgels and tablets
Lab testing
How to take it
With or without food
Space it a couple of hours from Iron and Calcium
On the label
Suggested use: Take one softgel daily, with a meal. For easier swallowing, take with water before and during ingestion.
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What 579 magnesium supplements cost
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.
Not medical advice. Consult your healthcare professional.