Exfoliants

Magnesium Lactate

INCI: MAGNESIUM LACTATE

Reviewed by Kate · Last updated 14 Aug 2026

A mild buffering agent that helps balance pH and support skin conditioning

Best For Skin Types

All, Sensitive, Combination

Addresses

Sensitivity, Barrier repair, pH balance

Usage Frequency

Daily

What Is Magnesium Lactate?

Magnesium lactate is a salt formed from magnesium and lactic acid. It functions as a buffering agent in skincare formulations, helping to stabilise and maintain optimal pH levels. This supports the skin's natural acid mantle and allows other active ingredients to work effectively.

The ingredient also has mild keratolytic properties, meaning it can help with gentle exfoliation, and contributes to skin conditioning by supporting the skin's natural moisture balance and protective barrier.

How It Works

Magnesium lactate works primarily by stabilising the pH of skincare products. By acting as a buffer, it prevents formulations from becoming too acidic or alkaline, which helps minimise irritation and allows actives to function within their optimal pH range.

The mild keratolytic action comes from the lactic acid component, which gently supports the skin's natural desquamation process. Additionally, magnesium itself is involved in various physiological processes within the skin, including enzyme function and cellular regulation.

Clinical Evidence & References

Evidence for magnesium lactate specifically in topical skincare is limited. However, magnesium compounds have been studied in wound healing and skin repair contexts, with some research suggesting that magnesium may help modulate inflammatory responses and support tissue regeneration.

The lactic acid component has well-established keratolytic and hydrating properties in skincare. When formulated as magnesium lactate, it provides a gentler pH-buffered form of lactic acid, though direct comparative studies are sparse. Most evidence supporting this ingredient comes from its individual chemical components rather than studies of the salt itself.

How to Use

Magnesium lactate is typically used as a supporting ingredient in formulations rather than a standalone active, so follow the usage instructions on your specific product. It works well in combination with other actives, as its buffering action helps create an optimal environment for their efficacy. No special application technique is required.

Safety & Precautions

Magnesium lactate is generally well-tolerated and considered safe for topical use. Those with sensitive skin should patch test first, particularly if the product contains other active ingredients.

Frequently Asked Questions

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