For relaxation, sleep support, and muscle recovery, this powder delivers 350mg of **Magnesium** from ionic magnesium citrate per 2-teaspoon serving. That puts you near the upper end of the clinical supplemental range (100–400mg).

Magnesium citrate is well absorbed and has decades of research behind it. The liquid format (you dissolve the powder in water) allows your body to start absorbing the magnesium quickly. With 113 servings per 16oz container, this offers good value if you're using it daily.

The tradeoff with citrate at this dose is digestive tolerance. At 350mg, some people experience loose stools — especially when starting out. If that's you, halving the serving and building up over a week or two is the standard approach. Glycinate-based magnesium products tend to be gentler at equivalent doses.

BioStacks

Natural Vitality

Natural CALM Original (Unflavored)

Liquid · 113 servings · $0.29/serving

80 / 100Excellent

Score Breakdown

Formulation
84
Safety
95
Final score
80/100

Ingredients (1)

Magnesium350 mg

Optimal dose

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

Magnesium350 mg

175%

Other Ingredients

Fillers, coatings, and additives

1Safe

Magnesium CitrateMineral

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.