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.

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BioStacks

Solgar

Magnesium Citrate

Tablet · 30 servings · $0.26/serving

72 / 100Good

Score Breakdown

Formulation
85
Safety
85
Final score
72/100

Ingredients (1)

Magnesium400 mg

Exceeds UL · Standard form

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

Magnesium400 mg

200%

Other Ingredients

Fillers, coatings, and additives

6Safe

Silicon DioxideAnti-caking

Safe

Magnesium StearateLubricant

Safe

Dicalcium PhosphateBinder

Safe

Microcrystalline CelluloseBinder

Safe

Microcrystalline CelluloseBinder

Safe

GlycerinHumectant

Safe

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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.