The order of a routine: why serum goes before cream

The rule, and the reason behind it

Thinnest to thickest. It is the version of the rule that fits on a card, and it works most of the time — but only because texture is standing in for the thing that actually decides the order.

What decides it is this: a step can only do its job if it can reach the skin. Some formulas leave a film behind. A film is the point of a moisturiser and the point of a sunscreen — it is what holds water in, or what holds the UV filter in place. But a film is also a barrier to whatever you apply next. So anything meant to reach the skin surface goes on before the things designed to sit on top of it.

Texture correlates with film-forming, which is why the shortcut works. Knowing the reason is what tells you where the shortcut breaks.

The four steps

1. Cleanse

Everything else is applied to whatever is left after this. Sebum, sunscreen residue and the day's deposit are all films of their own, and a serum applied over them is a serum applied to them.

The thing worth getting right here is not thoroughness but restraint. A cleanser that leaves skin feeling tight has taken more than the day's soil with it, and the following steps then spend themselves repairing that instead of doing what you bought them for. A pH-balanced formula with mild surfactants — coco-glucoside, cocamidopropyl betaine — removes the soil and leaves the rest. Ours is the Purifying Face Wash.

2. Serum, onto damp skin

A serum is the step with the highest concentration of water-soluble actives and the least film. It goes on second because it needs direct contact, and it goes on damp for a specific reason: humectants — glycerin, hyaluronic acid, sodium PCA — work by holding water. Give them water to hold and they hold it. Apply them to dry skin in dry air and they have to draw it from somewhere.

Press it in rather than rubbing. Three to four drops is a face; more than that is a step that has nowhere to go.

3. Moisturiser

This is the first deliberate film. Emollients and occlusives slow the rate at which water leaves the skin, which is what makes the serum underneath last longer than it otherwise would. That is also exactly why it comes after: a cream applied first would meet the serum with a barrier.

Eye area formulas are usually separate not because the skin needs entirely different chemistry, but because it is thinner, moves constantly, and sits next to something you must not get product into. Lighter textures, smaller quantities, and applied with the ring finger because it presses least hard.

4. Sunscreen, and nothing after it in the morning

Sunscreen is last in the morning and absent at night. It is last because the tested SPF assumes an unbroken film at a defined density — 2 mg per square centimetre — and anything applied over it disturbs that film. It is also the step people under-apply most, and half the quantity gives you less than half the protection.

Two hours is the reapplication interval, and after swimming or towelling regardless of the clock. Which filter you choose matters less than whether you reapply it; our article on mineral and organic filters covers the difference, including why a tint solves the grey cast.

Where the order genuinely matters

Most of the sequence is optimisation. Two parts of it are not.

Acids and sun exposure

Lactic acid, glycolic acid and the rest work on the skin surface, and they increase sensitivity to sunlight while you are using them. That is not a reason to avoid them; it is a reason that daily sunscreen stops being optional once they are in the routine. The instruction on the pack is the instruction, not a disclaimer.

Vitamin C, and why the form on the label matters

“Vitamin C” covers several ingredients that behave differently. Ascorbic acid is water-soluble and unstable, which is why it is sold at low pH in opaque packaging and why it degrades visibly over time. Ascorbyl palmitate is oil-soluble and stable in an emulsion — which is why it, and not ascorbic acid, is what you find in a cream that is meant to last its shelf life.

Neither is a better ingredient in the abstract. But they are not interchangeable, and a label that says only “vitamin C” has not told you which one is in the jar. The INCI list has — how to read an INCI list sets out where to look.

A routine that is four steps and not eleven

Every additional step is another film between the last one and your skin, another chance to apply too little of something that needed a full dose, and another product to keep buying. Four steps in the morning — cleanse, serum, moisturiser, sunscreen — and three at night, with the sunscreen dropped, covers what most skin actually needs.

Ours, in order: Purifying Face Wash, then the EXOVIA™ Skin Renewal Serum, then the RENOVÉA™ Ageless AM/PM Cream with the RENOVÉA™ Age-Defying Eye Cream around the eyes, and the Tinted Mineral Sunscreen SPF 30 last. Every one of them carries its complete INCI list on its page, in order.

Cosmetics act on the appearance and condition of the skin surface. Nothing here describes treating or curing a condition; if something on your skin concerns you, that is a question for a doctor rather than a routine.