This **magnesium bisglycinate** powder delivers 200mg of elemental magnesium per scoop in a well-absorbed form that's gentle on the gut — squarely within the 100–400mg supplemental range used for sleep, muscle relaxation, and easing tension. The powder format is the real advantage here: the label's one-to-two scoops daily lets you dial anywhere from 200 to 400mg to fit your needs.

One scoop is a solid daily amount but sits below the 310–420mg total RDA, so if you're using magnesium for sleep or correcting a shortfall, two scoops (400mg) reaches the top of the studied range. The glycine carrying the magnesium isn't just a carrier — it's a calming amino acid in its own right, which fits the sleep angle. Worth knowing: 400mg edges just past the 350mg supplemental upper limit, though bisglycinate is among the least likely forms to cause loose stools.

BioStacks
Thorne

Magnesium Bisglycinate

Powder · 3.11 Grams · 60 servings · $0.80/serving

iHerbAmazon

Best for

Sleep

Ingredients (2)

Magnesium Glycinate

100%

Dose

200 mg

Target

100–400 mg

Form

Premium

Magnesium

100%

Dose

200 mg

Target

100–400 mg

Form

Not listed

Other Ingredients (2)

Citric AcidAcidulant

Natural acid derived from citrus fruits

Monk Fruit ExtractSweetener

Zero-calorie natural sweetener derived from the monk fruit (Siraitia grosvenorii)

How to Take It

Best taken in the evening

Magnesium glycinate 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

Mix 1 scoop with at least 8 ounces of water one to two times daily or as recommended by your health-care practitioner.

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

Price Check

$48.00

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Pricier than 93% of 579 magnesium supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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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