Magnesium Chloride: An Ingredient Overview

Magnesium chloride (MgCl₂) is a naturally occurring mineral salt used as an ingredient in a range of topical skincare and body care formulations, including sprays, lotions, and creams. This page provides an overview of the ingredient, its sourcing, and its properties as used in our products.

What Is Magnesium Chloride?

Chemical Composition

Magnesium chloride is an inorganic salt composed of one magnesium ion and two chloride ions. In its most common form for topical use — magnesium chloride hexahydrate (MgCl₂·6H₂O) — each molecule is bound to six water molecules, making it highly soluble and well-suited for use in aqueous formulations.

Why Magnesium Chloride for Topical Formulations?

Among the many forms of magnesium available, magnesium chloride is commonly selected for topical formulations for several reasons:

High Solubility: Magnesium chloride dissolves readily in water, creating stable, concentrated solutions suitable for sprays, oils, and lotions.

Stability: Magnesium chloride solutions remain stable over time when properly stored, maintaining consistency without degradation.

Concentration Flexibility: It can be formulated at various concentrations — from gentle lotions (5–10%) to higher-concentration sprays — allowing for different product textures and application experiences.

Natural Occurrence: Magnesium chloride can be sourced from ancient seabeds and natural brine deposits, offering a naturally-derived mineral ingredient.

The Ancient Zechstein Seabed — Source Matters

What Is the Zechstein Seabed?

The Ancient Zechstein Seabed lies approximately 1,500–2,000 meters beneath the surface of Northern Europe, formed over 250 million years ago during the Permian period. This ancient inland sea gradually evaporated, leaving behind concentrated mineral deposits that have remained protected from modern environmental pollutants.

Why We Use Zechstein-Sourced Magnesium Chloride

Purity: Protected deep underground for millions of years, Zechstein magnesium chloride is free from modern contaminants, heavy metals, and pollutants that can affect surface-sourced minerals.

Mineral Composition: The slow evaporation process created a highly concentrated, naturally balanced mineral brine with exceptional magnesium chloride content.

Consistency: The geological stability of the deposit ensures consistent mineral composition and quality across batches.

Traceability: Zechstein-sourced magnesium can be traced back to specific extraction sites in the Netherlands and Germany, providing transparency and quality assurance.

How Magnesium Chloride Is Used in Our Formulations

We use magnesium chloride as a key ingredient across two product types:

Magnesium Spray:

  • A concentrated aqueous solution of magnesium chloride
  • Applies quickly to skin, suitable for targeted application
  • May leave a slight mineral residue that can be rinsed after 20–30 minutes
  • Example: Tranquil Shores Magnesium Spray

Magnesium Lotion:

  • Magnesium chloride blended with nourishing botanical oils and butters
  • Lower concentration; gentle and moisturizing
  • Suitable for full-body application
  • Example: Magnesium + Arnica Lotion

Concentration Levels

Topical magnesium chloride products vary in concentration, typically expressed as a percentage of magnesium chloride in solution:

Standard Strength (30–50% MgCl₂): Common in commercial magnesium sprays; a moderate concentration suitable for most users.

Higher Concentration (60–70% MgCl₂): A more concentrated formula; may produce a tingling sensation on skin, especially for first-time users.

Lotion/Cream Formulations (5–15% MgCl₂): Lower concentration blended with carrier oils and butters; gentler on skin and rarely causes tingling.

The Tingling Sensation

A temporary tingling, itching, or warming sensation is common when applying higher-concentration magnesium chloride products. This is a normal skin response to the ionic nature of the ingredient and typically subsides within 5–20 minutes. Most users find sensitivity decreases with consistent use.

To minimize tingling:

  • Apply to damp skin after showering
  • Start with lower concentrations and gradually increase
  • Dilute spray formulas with water if needed
  • Avoid broken, irritated, or freshly shaved skin
  • Switch to a lotion formulation for a gentler experience

Important: Persistent irritation, redness, or burning beyond mild tingling warrants discontinuation. Consult a healthcare provider if you have concerns.

Application Guidelines

For Sprays:

  1. Apply 4–10 sprays to clean skin
  2. Focus on target areas: legs, arms, shoulders, back, feet
  3. Massage gently until absorbed
  4. Allow 20–30 minutes before rinsing (optional)
  5. Use once or twice daily

For Lotions:

  1. Apply generously to clean, dry skin
  2. Massage into desired areas or use as a full-body moisturizer
  3. No rinsing necessary
  4. Use daily or as needed

Quality and Sourcing Standards

Ancient Zechstein Seabed: We specify Zechstein sourcing for exceptional purity and quality assurance.

Transparency: We clearly state concentration levels, sourcing, and full ingredient lists on all product pages.

Small-Batch Production: Our products are handcrafted in small batches in Florida for greater quality control and freshness.

Packaging: Amber glass bottles protect magnesium chloride from light degradation and preserve product integrity.

Safety Considerations

Topical magnesium chloride is generally well-tolerated when used as directed. Please note:

  • Skin Sensitivity: Discontinue use if you experience persistent irritation or discomfort beyond mild tingling.
  • Broken Skin: Avoid application to open wounds, cuts, or severely compromised skin.
  • Medications & Medical Conditions: If you take medications or have a medical condition, consult your healthcare provider before use.
  • Pregnancy and Breastfeeding: Consult your healthcare provider before using any new topical products.
  • Children: Use lower concentrations and consult a pediatrician before applying to young children.

Storage

  • Store in a cool, dry place away from direct sunlight
  • Properly stored magnesium chloride solutions remain stable for 1–2 years
  • Lotions and creams: follow manufacturer's recommendations (typically 6–12 months)

Disclaimer

The information provided on this page is for educational purposes about our cosmetic ingredients only. It is not intended as medical advice and should not be used to diagnose, treat, cure, or prevent any disease or health condition. These statements have not been evaluated by the Food and Drug Administration (FDA). If you have a medical condition, are pregnant or breastfeeding, or take medications, please consult a qualified healthcare provider before use.