If you're using magnesium to wind down, ease muscle tension, or support a steady heartbeat, the form here works in your favor. **Magnesium glycinate** is one of the best-absorbed, gentlest-on-the-stomach forms, and it's the type most associated with calm and sleep support.
Read the label closely: the '665 mg' on the front is the weight of the glycinate compound, not the magnesium your body actually absorbs. Each capsule delivers 120 mg of elemental magnesium — the number that matters — which sits just above the 100 mg therapeutic minimum.
To reach a meaningful daily intake, follow the directions and take all three capsules: that puts you at 360 mg of elemental magnesium, near the top of the 100–400 mg studied range. A single capsule gives you a modest 120 mg, so it's the three-times-daily schedule that makes this product deliver.
BioStacks
Best for
Ingredients (1)
Magnesium
100%Dose/day
360 mg
Target
100–400 mg
Form
Not listed
Other Ingredients (4)
Rice FlourFiller
Rice-based ingredients carry risk of inorganic arsenic contamination (FDA and Consumer Reports). Rice accumulates arsenic from soil at higher rates than other grains. Used as a cheap filler — adds nothing beneficial.
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
GelatinCapsule
Protein derived from collagen, used in traditional capsule shells
How to Take It
Best taken in the evening
Often taken at night for relaxation and sleep, but absorption is the same anytime — consistency matters most.
With or without food
Space it a couple of hours from Iron and Calcium
Label directs 3 servings — keep one for the evening
On the label
Directions: For adults, take one (1) quick release capsule three times daily, preferably with meals.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
No price yet
What 579 magnesium supplements cost
Track this supplement in your stack
Get personalized insights, interactions, and coverage recommendations.
Get Started FreeSimilar Supplements
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.