Poren lassen sich nicht dauerhaft verkleinern oder „schließen“ – aber sie können deutlich weniger sichtbar werden. Wir zeigen, was Talg, Alter und UV-Licht mit der Porengröße zu tun haben, welche Wirkstoffe belegt sind und wo Werbeversprechen übertreiben.

Does fasting really give you clear skin? We look at the research, from small psoriasis studies to a 2026 systematic review, and assess what is proven and what isn't.

Shiny T-zone, dry cheeks: combination skin needs care that balances both needs. We explain the causes, typical skincare mistakes and what a light, oil-free routine can look like.

Itchy, uniform little bumps that simply don't respond to classic anti-acne care? Often the cause is not bacteria but yeast colonising the hair follicles. We look at what sets fungal acne apart from real acne, why many skincare products tend to make it worse – and which care makes sense.

Mandelic acid is considered the mildest AHA and is especially recommended for blemish-prone, acne-prone skin. We look at what its larger molecular structure really means, what the research shows about its antibacterial effect – and why it is a regulatory special case for certified natural cosmetics.

Sulfur is considered a traditional insider tip for blemish-prone, oily skin. We look at what the older dermatological research really shows, why the ingredient is difficult to formulate – and why Cosmenia relies on odourless zinc alternatives.

Salicylic acid is considered the standard ingredient for blemishes – we take a critical look at its effects, irritation risk and the so-called purging phase, and explain why Cosmenia's Clear Skin Set relies on milder AHA fruit acids and zinc instead.

Kaolin clay is considered the mildest of the healing clays for blemishes – we look at what it really does, where its limits lie and why Cosmenia's Clear Skin Set relies on a more flexible, daily alternative.

Azelaic acid is considered a quiet all-rounder against acne, rosacea redness and dark spots. We take a critical look at how it works, what the research shows and its regulatory status – and where the limits of cosmetic concentrations lie.

Zinc PCA is advertised as a mild alternative to benzoyl peroxide for blemish-prone skin. We take a critical look at how it works, the research and its regulatory status – and when the ingredient is really worth it.

The short answer Niacinamide (vitamin B3) regulates sebum production, refines the skin's texture...