Top Low-Sodium Magnesium Picks
Magnesium supplements with minimal or zero sodium suit those watching salt intake, like people with hypertension or on low-sodium diets. Magnesium glycinate and citrate forms often have no added sodium, as they're chelated or bound without salts. Avoid magnesium oxide or sulfate, which can include sodium traces in some formulations.
- Nature Made Magnesium Glycinate: 200mg magnesium per capsule, 0mg sodium. Highly absorbable, gentle on stomach. Widely available at pharmacies for $10-15 per 60 capsules.
- Pure Encapsulations Magnesium Glycinate: 120mg per capsule, 0mg sodium. Hypoallergenic, third-party tested for purity. Costs $25-30 for 90 capsules; favored for sensitive users.
- Doctor's Best High Absorption Magnesium Glycinate Lysinate: 100mg elemental magnesium per tablet (from 2,000mg glycinate), 0mg sodium. Buffered for better uptake, around $15 for 120 tablets.
Check labels for "sodium-free" or exact 0mg listings, as formulations vary.
Why Glycinate Over Other Forms?
Glycinate binds magnesium to glycine for high bioavailability (up to 80% absorption) and low GI upset, unlike citrate (laxative effect) or oxide (poor absorption, ~4%). No sodium needed in production. Studies show it supports sleep, muscle relaxation, and blood pressure without electrolyte imbalance [1].
How Much Magnesium and Daily Limits?
Aim for 310-420mg elemental magnesium daily from all sources (RDA varies by age/gender). Supplements fill gaps; don't exceed 350mg supplemental to avoid diarrhea. Low-sodium versions match this without extras.
Who Needs Low-Sodium Versions?
Ideal for heart patients, kidney issues, or DASH diets where sodium tops 2,300mg/day limit. Magnesium deficiency hits 50% of Americans; low-sodium picks prevent compounding sodium load [2].
Potential Side Effects and Interactions
Rare with glycinate: mild nausea if overdosed. Interacts with antibiotics, bisphosphonates, or diuretics—space by 2 hours. Consult doctor if pregnant or on meds.
Cost and Where to Buy
$0.10-0.30 per dose. Amazon, Walmart, iHerb, or Vitamin Shoppe stock them; opt for USP-verified for quality.
[1] National Institutes of Health Office of Dietary Supplements - Magnesium Fact Sheet
[2] Journal of the American College of Nutrition - Magnesium Deficiency Prevalence