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.

Artichoke extract: when it fits into a routine for pores and shine
antioxidant
Artichoke extract: when it fits into a routine for pores and shine
An interesting botanical active for combination or oily skin, with important nuances if you are looking for less shin...
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
Vitamin K in cosmetics: when it makes sense and when it doesn't
renewing
Vitamin K in cosmetics: when it makes sense and when it doesn't
It is not one of the most well-known assets, but in certain contexts, it can make sense. I'll explain where it fits i...
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
Vegetable squalane: light emollience and skin barrier support
barrier
Vegetable squalane: light emollience and skin barrier support
A skin-native lipid that helps to soften, reduce water loss, and improve skin comfort without a dense feel.
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
Sulfur in cosmetics: when it makes sense and when it doesn't
acne
Sulfur in cosmetics: when it makes sense and when it doesn't
It's not an ingredient for everyone, but for oily skin with occasional breakouts, it can make sense if the formula is...
Published: 19 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
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

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