Each capsule delivers 125mg of **Magnesium** in the bisglycinate form — well-absorbed and gentle on your stomach. That's enough to put you at the low end of the clinical supplemental range (100–400mg), but if you're targeting sleep, stress, or muscle recovery, you'd likely want 2–3 capsules daily to reach the 250–400mg range where most benefits show up in research. Magnesium deficiency is extremely common, estimated to affect over half the population, so even one capsule adds meaningful support.
The small amount of **Vitamin C** (25mg as ascorbyl palmitate) is there as an antioxidant preservative, not a therapeutic dose — you'd need ten times that to enter the clinical range. Don't count on this product for vitamin C support.
With 180 capsules in the bottle, you have flexibility to adjust your daily dose based on your needs. At 2–3 capsules per day, you're looking at a 2–3 month supply and landing in the sweet spot for energy, muscle function, and relaxation support.
BioStacks
Best for
Ingredients (2)
Magnesium
100%Dose
125 mg
Target
100–400 mg
Form
Premium
Vitamin C
10%Dose
25 mg
Target
250–2000 mg
Form
Budget
Other Ingredients (1)
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
How to Take It
Best taken in the evening
Magnesium bisglycinate 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
Directions: Use as directed by your healthcare professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$42.50
Pricier than 91% 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.