At 400mg per serving, this delivers **Magnesium** right at the top of the clinically studied supplemental range (100–400mg) — enough to support muscle relaxation, sleep quality, stress reduction, and energy production. You're getting a full clinical dose in the standard two-tablet serving, so there's no guesswork about whether you're taking enough.

The citrate form absorbs well and is one of the more reliable options for magnesium. It does have a mild laxative effect, which can actually be helpful if you deal with occasional constipation but may be a drawback if you have a sensitive stomach. Magnesium deficiency is estimated to affect over half the population, and standard blood tests often miss it since serum levels don't reflect intracellular stores.

One thing to note: the supplemental upper limit for magnesium is 350mg, and this product delivers 400mg — slightly above that threshold. For most healthy adults this is well-tolerated, but if you're also getting magnesium from other supplements or fortified foods, it's worth keeping track of your total intake.

BioStacks
Solgar

Magnesium Citrate

2 Tablets · 30 servings · $0.26/serving

iHerbAmazon

Best for

Heart

Ingredients (1)

Magnesium

100%

Dose

400 mg

Target

100–400 mg

Form

Standard

Other Ingredients (6)

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Dicalcium PhosphateBinder

Calcium and phosphorus compound used as binder

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

GlycerinHumectant

Sweet-tasting liquid used in soft capsules and liquids

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and 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. clinical 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.

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