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.

Coconut oil on your skin: what works, what doesn't, and for whom it makes sense
anti-inflammatory
Coconut oil on your skin: what works, what doesn't, and for whom it makes sense
A clear guide to coconut oil in cosmetics: what it contributes to the skin barrier, which skin types it's best for, a...
Published: 03 June 2026
What is caffeine for? A pharmacist explains
anti-inflammatory
What is caffeine for? A pharmacist explains
Caffeine in cosmetics can help reduce inflammation, provide an antioxidant effect, and temporarily improve under-eye ...
Published: 03 June 2026
Green tea extract: useful antioxidant or cosmetic claim
anti-inflammatory
Green tea extract: useful antioxidant or cosmetic claim
An interesting antioxidant active ingredient, especially in soothing and urban formulas, but with more modest results...
Published: 03 June 2026
Arnica extract in cosmetics: when it makes sense and when it doesn't
anti-inflammatory
Arnica extract in cosmetics: when it makes sense and when it doesn't
Not all soothing agents work for everything. Arnica extract can be a good fit for comforting formulas, but it's impor...
Published: 03 June 2026
Horse chestnut: uses, precautions, and combinations
anti-inflammatory
Horse chestnut: uses, precautions, and combinations
Horse chestnut is primarily used for its calming, antioxidant, and decongestant effects. I'll tell you what the evide...
Published: 03 June 2026
Propolis in cosmetics: when it makes sense and when it doesn't
anti-inflammatory
Propolis in cosmetics: when it makes sense and when it doesn't
Not all natural remedies soothe equally. Propolis can help skin with breakouts or mild irritation, but it's important...
Published: 03 June 2026
Avocado oil in cosmetics: what it does for your skin and its benefits
anti-inflammatory
Avocado oil in cosmetics: what it does for your skin and its benefits
Avocado oil is an emollient rich in fatty acids and unsaponifiable matter that helps strengthen the skin barrier and ...
Published: 03 June 2026
Hemp oil in your routine: when to use it and when not to
anti-inflammatory
Hemp oil in your routine: when to use it and when not to
Hemp oil helps strengthen the skin barrier and soothe the skin. I'll explain its benefits, when to avoid it, and how ...
Published: 03 June 2026
Apple Stem Cells: Real Benefits and How to Use Them Properly
anti-inflammatory
Apple Stem Cells: Real Benefits and How to Use Them Properly
Apple stem cells in cosmetics do not regenerate your skin like a living cell, but they can help protect it from oxida...
Published: 03 June 2026
Menthol in cosmetics: freshness, relief, and its limitations
anti-inflammatory
Menthol in cosmetics: freshness, relief, and its limitations
Menthol provides an immediate cooling and relieving sensation, but it's not always suitable for sensitive or reactive...
Published: 03 June 2026
Topical Probiotics: When They Make Sense in Your Routine
anti-inflammatory
Topical Probiotics: When They Make Sense in Your Routine
They don't do the same thing as an oral probiotic, but they can help soothe and strengthen the barrier in certain ski...
Published: 03 June 2026
Chamomile extract in cosmetics: when it's worth it
anti-inflammatory
Chamomile extract in cosmetics: when it's worth it
A classic botanical ingredient that can help calm skin, but it's important to understand what it does and doesn't do.
Published: 03 June 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