For winding down and easing into sleep, you're getting 120mg of elemental **magnesium** per capsule, bound to glycine — the form best suited to calm and nervous-system support and the gentlest on digestion. One capsule already sits inside the 100–400mg clinical range, so even the minimum serving does real work, and the label's 1–4 capsule range lets you climb to the 240–360mg most sleep and stress research uses.
Magnesium absorbs well in this form, and the glycine it's attached to is itself mildly calming, so both halves of the molecule point toward relaxation. Roughly half of adults run low on magnesium, and since blood tests miss what's stored inside your cells, a well-absorbed daily dose is a dependable way to top up.
If deeper sleep is your goal, two capsules (240mg) taken with food is the practical sweet spot — comfortably within range and easy on your stomach.
BioStacks
Best for
Ingredients (1)
Magnesium
100%Dose
120 mg
Target
100–400 mg
Form
Premium
Other Ingredients (2)
Ascorbyl PalmitateAntioxidant
Fat-soluble form of vitamin C used as preservative
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 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
Recommendations: As a dietary supplement, take 1-4 capsules daily. Consume with food.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$27.00
Near the median 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.