What Does Magnesium Do for Sensitive and Stressed Skin?

TL;DR: Magnesium reduces inflammation, supports the skin barrier, and calms reactive skin -- making it one of the most useful minerals for skin that flares in response to heat, sweat, or friction.

What It Is

Magnesium is an essential mineral involved in over 300 biological processes. In the skin, it plays a direct role in barrier function, inflammation regulation, and cellular repair. Topical magnesium has been studied in the context of eczema, sensitive skin, and barrier-compromised skin -- with consistent findings of reduced transepidermal water loss and calmer inflammatory response.

How It Works on Body Skin

Body skin faces stressors that facial skin does not: clothing friction, sweat accumulation, heat, and environmental exposure on larger surface areas. Sensitive body skin -- skin that reddens easily, reacts to fabrics, or flares after exercise -- often has a compromised skin barrier. This means it loses moisture faster and lets irritants in more easily. Magnesium addresses this in two ways. First, it helps regulate inflammatory cytokines -- the signalling molecules that trigger the redness and irritation response. Second, it supports the synthesis of skin barrier lipids, helping the skin rebuild its protective layer. The result is skin that is less reactive, holds more moisture, and recovers faster from irritation caused by heat, sweat, or friction.

What to Expect

Days 1-3: Reactive or irritated skin feels calmer after washing. Week 2: Skin is less prone to redness after exercise or heat exposure. Week 4: Sensitivity frequency reduces. Skin feels more resilient overall. Magnesium works best as part of a consistent routine -- it is a barrier-supporting ingredient, not a treatment for acute flares.

How to Use It Correctly

Use as a daily body wash. Apply to damp skin, lather gently -- do not scrub vigorously on reactive skin. Rinse with lukewarm water, not hot. Hot water strips barrier lipids. Follow with a fragrance-free moisturiser. Daily use is ideal for skin that reacts frequently.

Who Should Use It

Anyone with sensitive, reactive, or easily irritated body skin. Particularly useful for skin that flares post-exercise, in hot weather, or after wearing synthetic fabrics. Safe during pregnancy. Suitable for all skin types, including those with eczema-prone skin -- though eczema flares require medical management, not just skincare.

The TLC Pick

The Active Body Wash collection includes formulations built around calming actives for skin that needs a gentler, science-backed approach to daily cleansing.