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 · 2 tsp · 113 servings · $0.29/serving

iHerbAmazon

Best for

Heart

Ingredients (1)

Magnesium

100%

Dose

350 mg

Target

100–400 mg

Form

Standard

Other Ingredients (1)

Magnesium CitrateMineral

Magnesium salt with bioavailable citrate form

Track this supplement in your stack

Get personalized insights, interactions, and coverage recommendations.

Get Started Free

Similar Supplements

Products that cover similar health dimensions based on their ingredients.

Magtein Magnesium L-Threonate

ForestLeaf

Magtein Magnesium L-Threonate

😴 for Sleep

100
NeuroMag™

Designs for Health

NeuroMag™

😴 for Sleep

100
Magnesium Glycinate 200 mg

Natural Factors

Magnesium Glycinate 200 mg

❤️ for Heart

100
OptiMag Neuro (Mixed Berry)

XYMOGEN

OptiMag Neuro (Mixed Berry)

😴 for Sleep

100
Magnesium Glycinate Complex 200 mg

Webber Naturals

Magnesium Glycinate Complex 200 mg

❤️ for Heart

100

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.

BioStacks

Know exactly what's in your supplements.

Navigate

  • Home
  • App Store
  • Google Play

Resources

  • Contact & Support
  • Pricing
  • Terms of Service
  • Privacy Policy
  • Refund Policy

Explore

  • Health Areas
  • Best Supplements
  • Nutrients
  • All Supplements

Popular Picks

  • Best Magnesium for Sleep
  • Best Collagen for Skin
  • Best Creatine for Muscle
  • Best Vitamin D for Bone Health
  • Best Probiotics for Digestion
  • Best CoQ10 for Heart
© 2026 BioStacks. All rights reserved. Not medical advice.