Ingredients

Evidence-reviewed skincare ingredients. What they do, how to use them, and whether they actually work.

Informational only. This content is for educational purposes and does not constitute medical advice. Always consult a qualified healthcare professional before starting any skincare regimen. Individual results vary.

Concern

Verdict

Evidence

Editor Tried

Acne & Sensitive Skin

Hypochlorous Acid (HOCl)

Evidence: Moderate

A low-drama antimicrobial calming spray.

Antioxidants

Astaxanthin

Evidence: Emerging

A carotenoid with better ingestible data.

Worth Exploring

Resveratrol

Evidence: Emerging

Promising antioxidant, still not foundational.

Rosehip Oil

Evidence: Moderate

A nourishing oil, not a scar cure.

Worth Exploring

Vitamin E (Tocopherol)

Evidence: Moderate

A supportive antioxidant and emollient.

Worth Exploring

Exfoliants

Glycolic Acid

Evidence: Strong

The strongest common AHA.

Lactic Acid

Evidence: Moderate

Gentler AHA with hydration overlap.

Mandelic Acid

Evidence: Moderate

Slow AHA often better tolerated.

PHAs — Gluconolactone & Lactobionic Acid

Evidence: Moderate

The gentlest exfoliant category.

Worth Exploring

Salicylic Acid

Evidence: Strong

The oil-soluble pore clearer.

Hydration, Barrier & Microbiome

Beta-Glucan

Evidence: Emerging

A soothing hydrator with repair logic.

Centella Asiatica / Madecassoside (Cica)

Evidence: Moderate

The calming K-beauty workhorse.

Ceramides, Cholesterol & Fatty Acids

Evidence: Strong

The barrier-repair lipid trio.

Ectoin

Evidence: Moderate

A stress-protection ingredient worth watching.

Worth Exploring

Hyaluronic Acid

Evidence: Moderate

A hydration binder, not a filler.

Panthenol (Pro-Vitamin B5)

Evidence: Strong

A simple barrier-support ingredient that earns its place.

Polyglutamic Acid (PGA)

Evidence: Emerging

A humectant with more marketing than evidence.

Postbiotics & Fermented Ingredients

Evidence: Emerging

Microbiome marketing needs receipts.

Snail Mucin (SCSM)

Evidence: Moderate

Hydrating, soothing, not scar-erasing magic.

Squalane

Evidence: Emerging

A lightweight seal for hydration.

Urea

Evidence: Strong

The unsexy dry-skin workhorse.

Peptides, Firming & Growth Factors

Argireline (Acetyl Hexapeptide-3)

Evidence: Moderate

Expression-line softener, not Botox.

Worth Exploring

Biomimetic & Multi-Peptide Complexes

Evidence: Emerging

Potentially useful, often impossible to audit.

Worth Exploring

EGF, Growth Factors & Mimetics

Evidence: Moderate

Interesting, expensive, evidence-limited.

Approach With Caution

GHK-Cu (Copper Peptides)

Evidence: Moderate

Repair-signalling peptide with real caveats.

Worth Exploring

Matrixyl (Palmitoyl Pentapeptide-4)

Evidence: Moderate

The classic collagen-signal peptide.

Worth Exploring

Peptides (Overview)

Evidence: Moderate

Useful support, not injectable-level lifting.

Worth Exploring

Pigmentation & Brightening

Alpha Arbutin

Evidence: Moderate

A gentler tyrosinase-targeting brightener.

Azelaic Acid

Evidence: Strong

The underrated active for redness, acne and pigment.

Ferulic Acid

Evidence: Moderate

The stabiliser behind stronger antioxidant formulas.

Glutathione

Evidence: Emerging

Overmarketed for skin whitening.

Kojic Acid

Evidence: Moderate

Effective in theory, irritating in practice.

Licorice Root Extract

Evidence: Moderate

A soothing brightener with uneven standardisation.

Niacinamide

Evidence: Strong

Barrier-supporting brightener with unusually broad use.

Tranexamic Acid (TXA)

Evidence: Moderate

A pigmentation calmer, not a bleach.

Vitamin C (L-Ascorbic Acid)

Evidence: Strong

A proven antioxidant that is formulation-sensitive.

Protection

Zinc Oxide / Mineral SPF

Evidence: Strong

The non-negotiable pigment and aging step. For melasma or pigment-prone skin, look for a tinted, iron-oxide mineral formula specifically - plain (white-cast) mineral SPF blocks UV but not visible light, which is a separate, documented melasma trigger.

Retinoids

Adapalene

Evidence: Strong

The acne retinoid that behaves better.

Bakuchiol

Evidence: Moderate

Retinol-adjacent, not retinol-equivalent.

Retinal (Retinaldehyde)

Evidence: Moderate

One step closer to retinoic acid.

Retinol

Evidence: Moderate

The classic OTC retinoid.

Tretinoin

Evidence: Strong

The prescription retinoid with the receipts.

Supplements & Ingestibles

Collagen (Oral / Ingestible)

Evidence: Moderate

More plausible than topical collagen, still not magic.

Targeted

Caffeine

Evidence: Emerging

Good for puffiness, not all dark circles.

The Debunk Shelf

CBD / Cannabidiol (Skincare)

Evidence: Emerging

Regulatory and evidence caveats, not a miracle calmer.

Colloidal Gold

Evidence: Limited

Luxury sparkle with weak skin-benefit evidence.

Crystal-Infused Skincare

Evidence: Emerging

No credible skin mechanism.

Oxygen-Infused Skincare

Evidence: Emerging

Oxygen claims are usually marketing fog.

Plant Stem Cells

Evidence: Limited

Plant cells cannot become human skin cells.

Volume, Plumping & Regenerative

Collagen (Topical)

Evidence: Emerging

Hydrates; does not rebuild lost collagen.

Exosomes

Evidence: Emerging

Promising clinic category, messy consumer category.

Approach With Caution

PDRN (Polydeoxyribonucleotide)

Evidence: Moderate

Regenerative science, topical marketing problem.

Worth Exploring

Volufiline (Sarsasapogenin)

Evidence: Emerging

Facial fat-growth claims are not proven.

Worth Exploring