BioStacks
21st Century

Magnesium Glycinate 200 mg

2 Capsules · 45 servings · $0.20/serving

iHerbAmazon

Best for

Sleep

Ingredients (1)

Magnesium

100%

Dose

200 mg

Target

100–400 mg

Form

Premium

Other Ingredients (5)

TalcAnti-caking

IARC classifies cosmetic-grade talc not containing asbestos as Group 2B (possibly carcinogenic to humans); perineal talc use as Group 2A (probably carcinogenic). Johnson & Johnson voluntarily withdrew talc-based baby powder from US/Canada in 2020 and globally in 2022 after extensive litigation tied to ovarian-cancer and mesothelioma cases. The 2018 FDA contamination survey found asbestos in 9 of 52 cosmetic talc products tested. As a supplement excipient talc is a pure manufacturing convenience — no nutritional or functional benefit to the user — so the asbestos-exposure risk has no offsetting upside. Safer alternatives (silicon dioxide, microcrystalline cellulose, rice hulls) are widely available.

Magnesium StearateLubricant

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

Microcrystalline CelluloseBinder

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

GelatinCapsule

Protein derived from collagen, used in traditional capsule shells

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

How to Take It

Best taken in the evening

Magnesium bisglycinate is the gentlest form on the gut and the one most people take at night. Absorption doesn't change with the clock — consistency does.

With or without food
Space it a couple of hours from Iron and Calcium

On the label

Take 2 capsules daily.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$9.02

$10$20$50

Cheaper than 96% of 579 magnesium supplements

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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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