Take both capsules daily and you're getting 300mg of elemental **magnesium** — squarely within the 100–400mg supplemental range studied for sleep, muscle relaxation, and steady heart rhythm. The label's 833mg figure is the magnesium bisglycinate compound weight; the elemental magnesium your body counts is 150mg per capsule, so the twice-daily direction is what reaches a full dose.
Bisglycinate is the reason to reach for this one — magnesium bound to the amino acid glycine absorbs well and stays gentle on the gut, sidestepping the loose-stool effect magnesium can otherwise cause. That makes it easy to take every day, which matters more than chasing a bigger number.
The thing to watch is the per-capsule math. One capsule gives you 150mg, a reasonable top-up, but reaching the studied range for calm and muscle support means following the label's two-a-day.
BioStacks
Other Ingredients (4)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
HypromelloseCapsule
Plant-derived capsule material from cellulose
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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.