Dull skin after summer: how to rejuvenate it in September

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Why September is the right time for a skin reset

Every year, when September arrives, I find myself taking stock of the same thing: during the summer, my skin seems to “hold up” well. The complexion is more even, minor redness is less noticeable, and there’s that golden glow everyone likes. But from personal and professional experience, I know it’s only a temporary illusion.

Behind that tan, there is often a weakened skin barrier, signs of dehydration, and the beginnings of a loss of elasticity. I see it in myself and in the people I work with: men and women of different ages and phototypes experience the same issues in September.

That’s why I consider this month a true skin check-up: it’s time to repair, restore what the skin has lost, and prepare it for autumn.

What really happens to the skin in summer

When I talk about summer damage, I’m not referring only to sunburn, which is serious and should always be avoided, but to a series of micro-stresses that build up:

• UVA and UVB rays: penetrate the skin’s layers, causing oxidation and the degradation of collagen and elastin.
• Wind and salt water: increase transepidermal water loss (TEWL) and leave the skin drier and more reactive.
• Chlorine: alters the skin’s physiological pH and compromises the barrier.
• Pollution: adds an additional oxidative burden.

The result is skin that, after returning from vacation, appears dull, less elastic, with an uneven texture and a tendency to dryness. Sometimes discoloration also appears, especially if sun protection has not been consistent.

How do I know that my skin needs a reset?

• Dullness: the skin no longer reflects light as it did in June.
• A feeling of tightness: a sign of moisture loss.
• Uneven texture: more visible pores and less smooth skin.
• Discoloration: spots become more noticeable as the tan fades.
• More pronounced fine lines: caused by summer oxidative damage.

It’s not just about appearance: these are signs of functional weakening.

As for dullness, one clarification is needed: in September, the main cause is dehydration of the stratum corneum, which is why recovery is quick. But there are four possible mechanisms, each requiring different interventions — I have separated them one by one in dull skin: causes and remedies. If your complexion has not improved after six weeks of following the routine, the cause was not seasonal.

My September routine: four steps

Over time, I have developed a simple approach, suitable for both men and women, that works because it addresses the skin’s real needs after summer.

1. Gentle cleansing

I use cleansers with gentle surfactants and a physiological pH. The goal is to cleanse without stripping the barrier. If the skin is very dry, I recommend double cleansing: first with a cleansing oil, then with a mousse.

2. Smart exfoliation

After summer, I prefer gentle exfoliants such as mandelic acid or PHAs, which renew the skin without stressing it. Once or twice a week is enough: immediately after summer, skin is more fragile than it seems, and overdoing exfoliation is the most common mistake in September.

3. Intensive restorative treatment

This is where SkinAge Advance comes in: a single-use mask I designed specifically to give the skin deep hydration, immediate comfort, and barrier support in one application. For me, it’s the perfect post-summer booster: I use it once a week during the first few weeks of September.

4. Daily hydration and protection

Serum and cream with hyaluronic acid are the foundation for rebuilding the barrier and keeping skin supple.

And I never forget sun protection: even in the city and when the sky is cloudy. It’s what makes everything else in the routine either worthwhile or pointless.

The ingredients I rely on at this stage

• Hyaluronic acid: immediate, long-lasting hydration.
• Ceramides: essential for rebuilding the barrier.
• Niacinamide: improves elasticity and evens out skin tone.
• Peptides: support collagen and elastin synthesis.
• Antioxidants: stabilized vitamin C and ferulic acid to protect and brighten.

How to incorporate SkinAge Advance into your routine

• Weeks 1-2: SkinAge Advance twice a week, after cleansing and exfoliation.
• Weeks 3-4: maintenance with one application per week.
• Daily routine with barrier cream and SPF.

A mistake I often see in September is trying to recover everything in two weeks by layering exfoliants, acids, and intensive treatments. Post-summer skin has a compromised barrier: introducing too many active ingredients at once worsens the situation instead of resolving it. Four to six weeks with a few consistent steps is better.

Lifestyle makes a difference

Skin is not cared for only from the outside:

• I drink enough water every day.
• I add fruit and vegetables rich in antioxidants.
• I supplement omega-3 with fish or oilseeds.
• I maintain a healthy sleep-wake rhythm: the skin regenerates at night.

Frequently asked questions

Why does skin get worse in September?

Because the cumulative effects of sun, wind, chlorine, and pollution become apparent: the barrier is weakened and hydration is reduced.

Is SkinAge Advance also suitable for men?

Yes: men's skin has the same hydration and repair needs after summer.

Is sun protection still necessary in autumn?

Yes, because UVA rays are present all year round and contribute to skin aging.

References

• Rittrié L, Fisher GJ. Natural and sun-induced aging of human skin. Cold Spring Harbor Perspectives in Medicine, 2015.
• Proksch E, Brandner JM, Jensen JM. The skin: an indispensable barrier. Experimental Dermatology, 2008.
• Lin FH et al. Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin. Journal of Investigative Dermatology, 2005.

On the website: dull skin: causes and remedies · skin barrier · LeLang partner pharmacies

Elisa Avalle, founder of LeLang Skin Care