Dry skin despite moisturizer? The real reason hardly anyone knows
What really happens with dry skin?
Dry skin is not a sign of neglect. It occurs when the skin's protective barrier – the so-called hydrolipid film – becomes imbalanced. This barrier consists of lipids, ceramides, and natural moisturizing factors. If this balance is disturbed, the skin struggles to retain moisture – leading to a change in skin feel: The skin feels tight, rough, and reacts more sensitively to external influences.
The most common causes – and the one you've overlooked
Dry skin can have many causes – both internal and external. Leading dermatologists distinguish between:
External (exogenous) factors:
- Cold outdoor air and dry heating air in winter
- Hot shower water that strips lipids from the skin
- UV radiation that can damage the skin barrier long-term
- Aggressive cleansing products with sulfates
Internal (endogenous) factors:
- Hormonal changes (menopause, pregnancy)
- Genetic predisposition
- Skin conditions like neurodermatitis or psoriasis
- Stress and lack of sleep due to elevated cortisol levels
But there's another factor that is particularly common in Germany and yet often overlooked: hard tap water.
Hard water in Germany – figures that will surprise you
Germany has one of the highest quality drinking water systems in the world. But quality doesn't always mean skin compatibility. According to an analysis by water treatment specialist Aqon Pure, which analyzed data from thousands of German water suppliers, around 40% of buildings in Germany are supplied with hard tap water.
Another source shows an even clearer picture: Approximately 75 percent of German households have hard water coming from their taps (Source: Ecowater Deutschland).
The hardest values are found in major German cities:
- Berlin: up to 23.9 °dH
- Frankfurt am Main: up to 19.7 °dH
- Munich: up to 19.0 °dH
- Cologne: over 14 °dH (officially "hard")
Above 14 °dH (degrees of German hardness), water is officially considered hard. For comparison: In Schloßkulm, Thuringia, the value is 46.53 °dH – more than three times the limit (Source: Aqon Pure, 2024
What does hard water do to your skin? The science behind it
Hard water contains high concentrations of calcium and magnesium ions. Scientific studies describe several ways in which these minerals can affect the skin's feel:
1. Alteration of the acid mantle The skin has a natural pH value of approximately 4.5–5.5 (slightly acidic). Hard water, however, is alkaline. Regular washing with alkaline water can influence this pH value and disturb the natural balance of the acid mantle.
2. Surfactant residues on the skin A study by the University of Sheffield (Journal of Investigative Dermatology, 2017) examined 80 subjects. The result: Skin washed with hard water showed increased deposits of sodium lauryl sulfate (SLS) – a common cleansing agent. These residues led to an altered skin reaction after washing, especially for sensitive skin.
3. Influence on the natural balance of the skin A review (PubMed, 2018: Skin Barrier and Calcium) describes that external calcium from hard water can influence the natural balance of the skin – especially for already compromised skin.
4. Connection with sensitive skin A systematic review with meta-analysis (Clinical & Experimental Allergy, 2020) evaluated data from 385,901 participants from 7 studies. The results suggest a connection between hard water and skin feel, especially in people with sensitive skin.
A recent UK Biobank study (2025) with approximately 486,000 adults over 14 years old investigated the connection between water hardness and skin reactions in different regions.
Note: The mentioned studies are scientific observations. The skincare products presented here are cosmetics – they serve skin care, not the treatment of diseases.
Which active ingredients support the skin's feel in stressed skin?
Cosmetic science knows a number of ingredients that are known for their nourishing properties in dry and stressed skin:
Ceramides Ceramides are natural components of the skin. Used in skincare products, they support the skin's moisture balance. They are a frequently recommended active ingredient for dry and stressed skin.
Hyaluronic acid A molecule naturally found in the skin, known for its moisturizing properties. Used in skincare products, it supports the skin's feel and has a nourishing effect.
Panthenol (Provitamin B5) Panthenol is known for its soothing and nourishing properties and is often used in products for sensitive and stressed skin.
Beta-Glucan (from oats/rice) A polysaccharide known for its calming effect on stressed skin and frequently used in sensitive skincare.
Probiotics (topical) Probiotic cultures in skincare products are known for their supportive effect on the natural skin microbiome.
Birch Extract (Betula Alba) Rich in natural polyphenols. Nourishes stressed skin and supports its moisture balance – a traditionally used active ingredient in natural cosmetics.
Why K-Beauty is suitable for stressed skin?
Korean skincare – or K-Beauty – has specialized over decades in a multi-layered skincare approach: gentle cleansing, intensive hydration through coordinated skincare steps, and long-term care with skin-friendly ingredients. This philosophy makes K-Beauty a popular choice for people who want to sustainably improve their skin's feel – even in regions with hard tap water.
The following routine has been specially put together for people in Germany – with products containing the active ingredients described above.
The Hard Water Routine – 4 Products for Nourished Skin
Step 1 – Toner: Anua Heartleaf 77 Soothing Toner
The first step after cleansing: a toner that immediately provides the skin with moisture and prepares it for further skincare steps.
The Anua Heartleaf 77 Soothing Toner contains 77% Heartleaf Extract (Houttuynia Cordata) – a plant traditionally used in Korean natural cosmetics, known for its soothing and nourishing properties. The light, water-like texture is quickly absorbed and leaves a pleasant, fresh skin feeling. Fragrance-free – for a comfortable skin feel even for sensitive skin.
Active ingredients: Houttuynia Cordata Extract (77%), Panthenol, Hyaluronic Acid, Niacinamide
Step 2 – Essence: Mixsoon Bean Essence
The second step intensely moisturizes the skin and supports its natural feel.
The Mixsoon Bean Essence is based on fermented soybean extract – an active ingredient valued in the K-Beauty world for its intensively nourishing and moisturizing properties. The light texture is quickly absorbed and leaves a pleasant, well-cared-for skin feeling. Completely vegan.
Active ingredients: Fermented Soybean Extract, Niacinamide, Panthenol, Sodium Hyaluronate
Step 3 – Cream: Skin1004 Madagascar Centella Soothing Cream
The core of the routine. A nourishing cream that moisturizes the skin and provides lasting comfort.
The Skin1004 Madagascar Centella Soothing Cream is based on Centella Asiatica extract from Madagascar – a globally renowned medicinal plant traditionally used in cosmetics for its soothing and nourishing properties. The light, non-greasy texture is suitable for daily use and provides a comfortable skin feel. Free from fragrances and alcohol.
Active ingredients: Centella Asiatica Extract, Madecassoside, Asiaticoside, Panthenol
Step 4 – Sunscreen: Beauty of Joseon Relief Sun Rice + Probiotics SPF50+
Sunscreen is an important step in any daily skincare routine – regardless of the season.
The Beauty of Joseon Relief Sun Rice + Probiotics SPF50+ combines reliable UV protection with the nourishing effect of rice extract and probiotic cultures, known for their supportive profile on the natural skin microbiome. The light texture leaves no white cast and is suitable for daily use – even for sensitive skin.
Active ingredients: Rice Extract, Lactobacillus Ferment, SPF 50+, PA++++
How to apply the routine?
Morning: Gently cleanse face – use lukewarm water
- Gently pat Anua Heartleaf 77 Toner onto slightly damp skin and let it absorb.
- Apply Mixsoon Bean Essence evenly and allow it to absorb.
- Apply Skin1004 Centella Soothing Cream.
- Apply Beauty of Joseon Relief Sun SPF50+ as the final step.
Evenings: Gently cleanse your face – use lukewarm water. Repeat steps 1–3, without sunscreen.
Tip: Apply the products directly after washing – for an optimal skincare experience.
The Hard Water Routine
Frequently Asked Questions
Can hard water affect skin feel?
Scientific studies show that hard water can affect skin feel – especially for people with sensitive skin. A gentle skincare routine can help improve skin feel.
Should I filter my water?
A water filter can be an option. However, a well-coordinated skincare routine with skin-compatible active ingredients is already an effective approach for many people to improve skin feel.
Which skin types is this routine suitable for?
This routine is particularly suitable for dry, normal, and sensitive skin. All four products are fragrance-free and alcohol-free.
When can I expect to notice changes in my skin feel?
Many users report a significantly more comfortable skin feel after 4–6 weeks of regular use. Individual results may vary.
Note: The products presented here are cosmetics. They are intended for skin care and do not replace dermatological advice or medical treatment. For persistent skin problems, we recommend consulting a dermatologist.