Ingredients

A pharmacist-led guide to cosmetic actives. Every ingredient explained with scientific evidence: what it does, how to use it and what to combine it with.

Laminaria extract: when it truly fits into a soothing routine
antioxidant
Laminaria extract: when it truly fits into a soothing routine
An interesting marine active for sensitive, dehydrated or altered skin, with more soothing than spectacular benefits.
Published: 25 May 2026
Ethyl macadamiate: light emollience and silky finish
antioxidant
Ethyl macadamiate: light emollience and silky finish
A light emollient that improves formula spreadability and leaves skin feeling soft, with less greasy residue than oth...
Published: 25 May 2026
Fucus extract: when it makes sense in cosmetics
antioxidant
Fucus extract: when it makes sense in cosmetics
An interesting marine active ingredient for its moisturizing and antioxidant profile, although its more ambitious eff...
Published: 25 May 2026
Mango Butter: When it provides comfort and when it falls short
emollient
Mango Butter: When it provides comfort and when it falls short
A very pleasant vegetable butter for dry or sensitized skin, but with important nuances if you're looking to treat ac...
Published: 25 May 2026
Cucumber extract: when it provides comfort to the skin
antioxidant
Cucumber extract: when it provides comfort to the skin
A gentle botanical active that can provide freshness and comfort, but it's important to understand what it truly does...
Published: 20 May 2026
Chondroitin Sulfate: Hydration and Elasticity in Cosmetics
emollient
Chondroitin Sulfate: Hydration and Elasticity in Cosmetics
A little-known ingredient primarily used to improve skin hydration, comfort, and flexibility in body and face care fo...
Published: 20 May 2026
Jojoba esters: when they make sense in cosmetics
emollient
Jojoba esters: when they make sense in cosmetics
An emollient and soothing ingredient that improves skin comfort without complicating your routine, especially when yo...
Published: 20 May 2026
Elastin in cosmetics: what it can really do for your skin
anti-wrinkle
Elastin in cosmetics: what it can really do for your skin
Topical elastin is primarily used as a conditioning and moisturizing ingredient. I'll explain what results are realis...
Published: 20 May 2026
Beta-Glucans: When They Make Sense in a Sensitive Routine
barrier
Beta-Glucans: When They Make Sense in a Sensitive Routine
They're not the most striking ingredient, but they can be a great fit for sensitive, irritated, or irritation-prone s...
Published: 19 May 2026
Arginine: when it makes sense in cosmetics and what you can expect
barrier
Arginine: when it makes sense in cosmetics and what you can expect
An amino acid useful for supporting skin hydration and comfort, with a more discreet role than marketing sometimes su...
Published: 19 May 2026
Allantoin in cosmetics: when it soothes and when it's barely noticeable
barrier
Allantoin in cosmetics: when it soothes and when it's barely noticeable
A discreet yet useful active ingredient for irritated, sensitive, or compromised skin.
Published: 19 May 2026
Carrot Oil: when it makes sense in your routine
antioxidant
Carrot Oil: when it makes sense in your routine
A vegetable oil interesting for its antioxidant and emollient profile, but with important nuances about what it can t...
Published: 19 May 2026

What are cosmetic active ingredients

Cosmetic active ingredients are the components responsible for making a product do what it promises. Unlike excipients (which provide texture, preservation or fragrance), actives are the ones that produce a real, measurable effect on the skin: stimulating collagen, inhibiting melanin, strengthening the skin barrier or accelerating cell renewal.

The problem is that most brands do not explain which actives they use, at what concentration or why. This pharmacist-led guide to cosmetic ingredients was created to change that: each article analyses an active ingredient with the available scientific evidence, without exaggeration or empty promises.

How to use this ingredient guide

Each article in this guide includes a summary card with the INCI name, effective concentration, potency, recommended skin type, routine step and compatibility with other actives. You will also find information on use during pregnancy and verifiable scientific references.

All content is written and reviewed by a licensed pharmacist with over 20 years of experience. This is not a standard cosmetic ingredient list — it is a professional guide designed to help you make informed decisions about your skincare.

Arancha Grediaga
Author and reviewer
Pharmacist · Dermocosmetics Expert · COFA License #6497
+20 years of community pharmacy experience · Technical Lead at EVUE Cosmetics