Glow Has No Expiry Date: The New Rules of Skin After 40

Turning 40 does not flip a switch in your skin. But the changes that have been happening quietly since your late twenties — slower cell turnover, gradual collagen loss, a drier barrier — become easier to see. The good news: the habits that genuinely help are fewer, cheaper and simpler than most beauty marketing suggests.

Rule 1: Sunscreen is the real anti-ageing product

Most of the visible ageing on the face — fine lines, uneven pigment, rough texture — is driven by ultraviolet light rather than the calendar. In a large randomised trial in Australia, adults who were asked to use broad-spectrum sunscreen daily showed no detectable increase in skin ageing over four and a half years, while the group using sunscreen at their own discretion did.¹

Choose a broad-spectrum SPF 30 or higher, apply it every morning, and use enough of it (most of us do not). If you only change one thing, change this.

Rule 2: Add one proven active — and give it time

Among ingredients you can buy without a prescription, retinoids (vitamin A derivatives such as retinol) have the most robust evidence for improving fine lines and texture.² Start slowly, two or three evenings a week, and judge results at three to six months, not three weeks. We explain how in our guide to retinol after 40.

Rule 3: Treat dryness as a real change

Skin produces less oil with age, and the drop in oestrogen around menopause is linked to a fall in skin collagen.³ That is why many women notice tightness, flaking or new sensitivity in their forties and fifties. A fragrance-free moisturiser with ingredients such as glycerin, ceramides or hyaluronic acid, applied to slightly damp skin, often makes more visible difference than an expensive serum.

Rule 4: Be gentle

Over-cleansing, harsh scrubs and stacking too many actives can damage the skin barrier, which then looks dull and reactive. A mild cleanser once or twice a day is enough. If your skin stings when you apply moisturiser, do less, not more.

Rule 5: Your lifestyle is on your face

Dermatologists consistently point to the same everyday factors: smoking accelerates skin ageing, and poor sleep, high alcohol intake and very sugary diets are associated with duller, less resilient skin.⁴ None of these is about perfection — but they are where the biggest, cheapest gains are.

The best routine after 40 is not the longest one. It is the one you can keep doing.

A simple routine to start with

• Morning: gentle cleanse or water rinse, moisturiser, broad-spectrum SPF 30+.
• Evening: cleanse, retinoid two to three nights a week (building up), moisturiser.
• Weekly check: if anything stings, burns or flakes for more than a few days, pause the active and simplify.

If you have a skin condition such as rosacea or eczema, or are pregnant or breastfeeding, talk to a doctor or dermatologist before adding active ingredients.