About Us

At Nordisk Renhet, we believe that clean water is the foundation of true well-being. Our mission is to help people achieve healthier skin and hair by tackling an often-overlooked problem—your shower water.

Our Commitment

We are dedicated to providing high-quality, effective filtration solutions that remove chlorine, heavy metals, and other contaminants from your shower water. Every product we create is designed to elevate your daily routine, helping you experience softer skin, stronger hair, and lasting hydration—naturally.

Why We Exist

For too long, people have struggled with skin irritation, dryness, and thinning hair—without realizing the culprit was their water. At Nordisk Renhet, we set out to change that by offering simple, science-backed solutions that work seamlessly in your home.

Our products are designed for effortless installation, long-lasting performance, and real results.

Make the switch today and experience the difference of cleaner, purer water—one shower at a time.

Understanding the Science Behind Hard Water's Impact

Hard Water and Eczema Risk:

Children in elementary/primary school exposed to hard water may experience a 43% increased risk of eczema.

A meta-analysis showed increased odds of atopic eczema in children exposed to harder water.

Living in a hard water area is associated with an increased risk of atopic dermatitis (AD).

One study noted a statistically significant increased risk of atopic eczema in primary school-aged children exposed to hard water (OR 1.43; 95% CI 1.09, 1.87).

Hard water may contribute to the development of atopic eczema in early life.

Hard Water, Skin Barrier Function, and TEWL:

People with eczema and a specific gene mutation (FLG) experience almost double the skin dryness after washing with harsh soaps in hard water.

Atopic Dermatitis (AD) patients with a filaggrin (FLG) mutation showed a 94% greater increase in TEWL after being washed with sodium lauryl sulfate (SLS) in hard water.

Hard water can reduce skin barrier function, regardless of chlorine levels.

The increase in TEWL correlates with the amount of SLS deposited on the skin.

Water softening mitigates the negative effect of hard water on skin barrier function.

Hard Water and Surfactant Deposition:

Hard water can cause almost three times as much soap (SLS) to stick to your skin.

Hard water is associated with 2.8 ± 0.6-fold greater SLS deposition on the skin compared to deionized water.

High calcium levels in hard water reduce the solubility of surfactants, increasing their deposition on the skin.

Hard water increases skin exposure to harmful surfactants.

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