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Swanson

Magnesium L-Threonate

in the Afternoon: 1 Vegan Capsule

iHerbAmazon

Best for

Sleep

Ingredients (2)

Magtein® magnesium L-threonate

100%

Dose

670 mg

Target

100–400 mg

Form

Premium

Magnesium

48 mg

Trace amount — not scored

Other Ingredients (3)

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

Capsule ShellCapsule

Generic capsule shell where the label does not specify the material. Common materials are hypromellose (HPMC) for vegetarian capsules and gelatin for traditional capsules — both are GRAS-listed and safe. Fish gelatin and pullulan variants also exist.

How to Take It

Best taken in the evening

Magnesium L-threonate is designed to raise magnesium in the brain — shown in animals. The human cognition trial dosed 1.5–2 g/day, usually split with a dose in the evening.

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

On the label

As a dietary supplement, take one vegan capsule in the afternoon and two vegan capsules in the evening with water.

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

Price Check

$35.29

$10$20$50

Pricier than 80% of 574 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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