Aluminum/Magnesium Hydroxide Stearate

Aluminium/magnesium hydroxide stearate is a compound derived from natural minerals (aluminium and magnesium) combined with stearic acid, a fatty acid. In skincare formulations, it functions primarily as an emulsion stabiliser and viscosity controller, helping to maintain the texture and consistency of creams and lotions.This ingredient has been studied for its potential protective role in skincare, particularly in formulations designed to support compromised or sensitised skin. It works by creating a protective layer on the skin surface.

Aluminium/magnesium hydroxide stearate creates a protective film on the skin surface. This film acts as a physical barrier, helping to minimise contact between irritants or allergens and the underlying skin, whilst also reducing transepidermal water loss (the natural evaporation of moisture from skin).Within the formulation itself, it stabilises the emulsion—the blend of water and oil phases—ensuring the product remains consistent and effective throughout its shelf life.

This ingredient is typically found in barrier-support creams and moisturisers designed for sensitive or compromised skin. Use as directed on the product label, generally as part of your daily skincare routine. It works best when applied to clean skin and can be used alongside other actives, though you may wish to introduce it gradually if your skin is particularly reactive.

Aluminium/magnesium hydroxide stearate is generally well-tolerated and considered safe for topical use in skincare. It is unlikely to cause irritation, though those with known sensitivities to aluminium compounds should patch test first.