Anti-Ageing Serums: How to Choose by Ingredient
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Short answer: choose an anti-ageing serum by its active ingredient and your skin's tolerance, not by the promise on the label. Retinoids and vitamin C are the most researched ingredients for the appearance of skin ageing; niacinamide, peptides and bakuchiol have more limited evidence. None of them replaces daily sunscreen.
What a serum is
A serum is a lightweight formula, usually applied after cleansing and before moisturiser, designed to deliver one or more active ingredients. "Anti-ageing" isn't a regulated category: what counts is what's in the INCI list and in what form.
The ingredients, by what we know about them
- Retinoids (retinol, retinal) — the most studied in cosmetics for the appearance of fine lines and uneven texture. They need a gradual introduction: dryness and stinging are common at first.
- Vitamin C (ascorbic acid and derivatives) — antioxidant with research for the appearance of uneven tone and radiance. The purest forms are less stable; opaque, well-sealed packaging helps.
- Niacinamide — well tolerated by most skin; used to support the skin barrier and a more even tone.
- Peptides — common in anti-ageing formulas, but studies are generally small and formula-dependent.
- Bakuchiol — plant-derived ingredient compared with retinol in studies, with less research. It isn't a retinoid.
- Hyaluronic acid — humectant: helps hold water at the skin's surface. The effect is hydration, not structural change.
How to choose
- Start with the basics. Gentle cleansing, a suitable moisturiser and daily sunscreen come before any serum.
- Pick one main active. Tolerant skin and patience for a slow introduction: a retinoid. Reactive skin: niacinamide or bakuchiol are usually easier to introduce.
- Read the INCI list. Check the ingredient is there, and whether the formula contains fragrance if your skin reacts to it.
- Introduce one product at a time. That way you can tell what works and what irritates.
- Give it time. Any visible change depends on your skin and consistency; be wary of guaranteed timeframes.
Combinations and order
Apply from lightest to richest: water-based serum, then oil or cream. Retinoids and exfoliating acids on the same night make irritation more likely: at first, alternate nights. Vitamin C usually fits in the morning, before sunscreen.
If you'd rather avoid retinol, the Retinol Alternative Serum is an oil with bakuchiol and organic plant oils. Contains fragrance.
Retinol Alternative Serum →To compare retinol and bakuchiol in detail, read Retinol or bakuchiol?.
FAQ
At what age does it make sense?
There's no right age. Daily sunscreen always makes sense; actives like retinoids make sense when you have a specific goal and your skin tolerates them.
Do I need several serums?
No. One well-chosen active used consistently is easier to manage than several at once.
What about during pregnancy?
Retinoids are usually avoided. Any change to your routine at that time should be decided with a healthcare professional.