BioStacks
Twinlab

Magnesium Caps 420 mg

1 Capsule · 200 servings · $0.07/serving

iHerbAmazon

Best for

Heart

Ingredients (2)

Magnesium

100%

Dose

420 mg

Target

100–400 mg

Form

Not listed

Magnesium Oxide

100%

Dose

420 mg

Target

100–400 mg

Form

Budget

Other Ingredients (4)

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.

Medium Chain Triglyceride OilCarrier

Fractionated oils rich in C8/C10 triglycerides used as neutral carrier or anti-sticking agent

GelatinCapsule

Protein derived from collagen, used in traditional capsule shells

StarchBinder

Carbohydrate polymer used as a binder, filler, and disintegrant in tablets and capsules

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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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