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.

Ruscus extract: when does it make sense for skin with redness
anti-inflammatory
Ruscus extract: when does it make sense for skin with redness
An interesting botanical extract for soothing and comforting formulas, although its real role depends heavily on the ...
Published: 25 May 2026
Ivy extract in cosmetics: when it can be beneficial
anti-inflammatory
Ivy extract in cosmetics: when it can be beneficial
It's not one of the most decisive botanical extracts, but it can fit into soothing and antioxidant formulas with real...
Published: 25 May 2026
Hotflux TM in cosmetics: localized heat, when it fits and when it doesn't
anti-inflammatory
Hotflux TM in cosmetics: localized heat, when it fits and when it doesn't
A warming ingredient that might make sense in body formulas, but it's not for every skin type or every area.
Published: 25 May 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: 25 May 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: 25 May 2026
Topical vitamin B2: when it benefits the skin
anti-inflammatory
Topical vitamin B2: when it benefits the skin
Riboflavin in cosmetics: what role it plays, when it fits into a formula, and what realistic results can be expected ...
Published: 25 May 2026
Zinc sulfate in cosmetics: when it can make sense
acne
Zinc sulfate in cosmetics: when it can make sense
A functional ingredient with antimicrobial and soothing properties, but with important nuances depending on the formu...
Published: 20 May 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: 20 May 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: 20 May 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: 20 May 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: 19 May 2026
Benzoic acid in cosmetics: what it does and when it makes sense
anti-inflammatory
Benzoic acid in cosmetics: what it does and when it makes sense
A classic preservative with an antimicrobial function, useful in well-formulated products, but with nuances that are ...
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