Each capsule delivers 150mg of **Magnesium** in citrate form — a well-absorbed option that sits right at the bottom of the clinical supplemental range (100–400mg). At one capsule, you're getting a modest dose that covers basic maintenance, but the label suggests taking up to three daily. At two to three capsules (300–450mg), you'd land squarely in the range used in clinical research for sleep support, muscle relaxation, and stress reduction.

**Magnesium** deficiency is extremely common — estimated to affect over half the population — and blood tests often miss it because serum levels don't reflect what's stored inside your cells. The citrate form absorbs well and has a mild laxative effect, which can be a benefit or a drawback depending on your digestion.

The main consideration is that the supplemental upper limit for magnesium is 350mg, and three capsules would put you at 450mg. If you're taking two capsules daily, you're in a comfortable range for most of the health goals this product supports — from energy and heart rhythm to bone health.

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BioStacks

Natural Factors

Magnesium Citrate 150 mg

Capsule · 90 servings · $0.12/serving

78 / 100Good

Score Breakdown

Formulation
78
Safety
100
Final score
78/100

Ingredients (1)

Magnesium150 mg

Within effective range

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

Magnesium150 mg

75%

Other Ingredients

Fillers, coatings, and additives

3Safe

Magnesium StearateLubricant

Safe

GelatinCapsule

Safe

Microcrystalline CelluloseBinder

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.