You're getting 200mg of **Magnesium** per serving in a chelated bisglycinate form — one of the best-absorbed options available and notably gentle on your stomach. At 200mg, you're solidly within the 100–400mg clinical supplemental range, which is enough to support muscle relaxation, sleep quality, and energy production, especially if you're among the estimated 50%+ of people with inadequate magnesium intake.

Because bisglycinate is listed among the forms exempt from the typical 350mg supplemental upper limit, you have flexibility to take an extra serving on days you feel you need it without the GI discomfort that comes with lower-quality forms. This makes it a practical daily foundation for sleep, stress, and muscle support.

The main limitation is that 200mg covers roughly half of the total RDA (310–420mg depending on age and sex), so you're relying on your diet to close the gap. If you're supplementing specifically for sleep or stress relief, research often uses doses closer to 300–400mg — meaning one serving may not be enough on its own.

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BioStacks

California Gold Nutrition

Magnesium Bisglycinate 200 mg

Capsule · 30 servings · $0.31/serving

93 / 100Excellent

Score Breakdown

Formulation
93
Safety
100
Final score
93/100

Ingredients (1)

Magnesium200 mg

Optimal dose · Premium form

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

Magnesium200 mg

100%

Other Ingredients

Fillers, coatings, and additives

4Safe

Magnesium StearateLubricant

Safe

Silicon DioxideAnti-caking

Safe

Microcrystalline CelluloseBinder

Safe

Microcrystalline CelluloseBinder

Safe

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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.