What this hub covers
In this library, “active” means an ingredient people usually add on purpose for a visible job: clearer congestion, calmer redness, steadier tone, or slower photoageing. That is different from a hydrator or emollient whose main job is comfort. Actives are also where most irritation and “I stacked too much” stories start.
The scanner rates each of these against your skin profile when you scan a barcode. This hub is the reference view: who each active is written for, who should go slow, and which layering edges already have a dedicated pairing page.
Introduce one new active at a time. If two strong actives both claim the evening slot, alternate nights rather than proving your barrier can survive both.
Cosmetic reference only — not medical advice. Persistent irritation, swelling, or symptoms that worry you deserve a clinician, not another serum.
How to use this list
- Start with the ingredient that matches your primary goal (congestion, tone, or photoageing), not the one with the loudest marketing name.
- Read the caution-for skin types on each card before you buy a second active for the same concern.
- If the library already has a “can I mix…?” page for a pair you use, open that before layering them the same night.
Ingredients in this category
8 library entries tagged active.
Active
Niacinamide
A vitamin B3 derivative that supports the skin barrier, calms redness, and gradually evens tone. One of the few actives almost everyone tolerates.
Active
Retinol
The best-evidenced over-the-counter anti-ageing and acne active, and also the one most likely to make your skin worse before it gets better.
Active
Bakuchiol
A plant-derived ingredient often marketed as a gentler retinol alternative. Better tolerated, with a much smaller evidence base.
Active
Azelaic Acid
An unusually versatile active that handles redness, spots and dark marks at once, and is gentle enough for most sensitive skin.
Active
Benzoyl Peroxide
The most effective over-the-counter acne ingredient, and the one most likely to dry you out and bleach your towels.
Active
Adapalene
A third-generation retinoid available without prescription in many countries. Stronger evidence for acne than retinol, and more stable.
Active
Tea Tree Oil
A botanical with real antibacterial activity against acne, and real sensitising potential at the strengths people use undiluted.
Active
Peptides
Short chains of amino acids marketed as collagen signals. Well tolerated, plausible mechanism, modest and inconsistent real-world evidence.
