Supplement Scholar
Mineral

Magnesium Chloride

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Magnesium Chloride. Topical and oral magnesium with good absorption — commonly used in 'magnesium oil' sprays.

How it works. Dissociates rapidly; chloride aids stomach acid (HCl) production.

What the research supports. 2 graded claims. Strongest: Supports low-stomach-acid digestion (limited).

How much to take. Typical dose: 200–400 mg elemental oral; spray PRN topical.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Creatine monohydrate, Whey or EAAs.

Common forms. Available as Chelated form (glycinate, bisglycinate, citrate, malate), Inorganic salt (oxide, sulfate, chloride), Liquid ionic solution, Topical or transdermal preparation.

Key studies. 9 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Magnesium Chloride. Anecdotes are not medical advice.

Magnesium Chloride. Topical and oral magnesium with good absorption — commonly used in 'magnesium oil' sprays.

Molecular structureCl2Mg · 95.21 g/mol

What it is

Topical and oral magnesium with good absorption — commonly used in 'magnesium oil' sprays.

Food sources

Whole foods (leafy greens, legumes, nuts, seeds, seafood, animal proteins)Fortified foods such as cereals, breads, plant milks, and table saltMineral supplements as chelates, citrates, glycinates, or inorganic salts

Goals

Muscle GrowthGeneral Wellness

How it works

Dissociates rapidly; chloride aids stomach acid (HCl) production.

Pathways

  • Mg-ATP
  • Gastric acidity

Effects

  • +low-stomach-acid digestion supports
  • +Transdermal absorption (controversial) supports

What the research supports

Supports low-stomach-acid digestionlimited
Transdermal absorption (controversial)anecdotal

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
200–400 mg elemental oral; spray PRN topical
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith food (oral)
Best formMost evidence is based on the chelated form (glycinate, bisglycinate, citrate, malate) form.
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Side effects & interactions

Common side effects

  • Skin tingling (topical)

Medication interactions

Prescription medications (general)minor

Always disclose Magnesium Chloride use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Creatine monohydrateFoundational support for strength, power, and lean mass.
  • Whey or EAAsProvides amino acid substrate for muscle protein synthesis.

Common forms

  • Chelated form (glycinate, bisglycinate, citrate, malate)
  • Inorganic salt (oxide, sulfate, chloride)
  • Liquid ionic solution
  • Topical or transdermal preparation

Key studies

9 studies cited in total.

PubMed: Magnesium Chloride — Supports low-stomach-acid digestion ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Magnesium Chloride and "Supports low-stomach-acid digestion". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Magnesium Chloride — Transdermal absorption ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Magnesium Chloride and "Transdermal absorption". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Magnesium Chloride — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Magnesium Chloride and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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