Retinol: what it does to the skin and how to use it without causing irritation

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Retinol is one of the most extensively studied actives in skincare: a vitamin A derivative that works on wrinkles, texture, dark spots, and blemishes. However, it is not tolerated equally by all skin types, and like any retinoid, it can cause dryness and irritation.

It is not an ingredient to fear: it is a powerful active that should be understood, respected, and used in the right amount. And for those who cannot tolerate it, there are alternatives supported by solid evidence. Let’s look at how it works, how to introduce it without causing damage, and when it is worth choosing another option.

What retinol is and why it works

"Retinol" refers to a family of molecules related to vitamin A — retinoids — which includes retinol itself, its esters such as retinyl palmitate, and more direct forms such as tretinoin, a prescription medication.

Retinoids work through a receptor-mediated mechanism: they influence epidermal proliferation and differentiation, collagen production, and melanin distribution. In short, they accelerate cell turnover, the natural renewal process that slows with age and leaves the skin looking duller and more marked.

What you see, and when

• Radiance: this is the first noticeable effect, because the surface cleared of dead skin cells reflects light better.
• More even texture: the texture becomes smoother and pores appear less noticeable.
• Reduced fine lines: a real improvement in lines caused by photoaging, not their complete erasure.
• More even skin tone: sunspots and post-acne marks gradually fade.

The timeline is long: the first visible differences appear after around 8–12 weeks, while collagen-related results take months.

Retinization: the adjustment period

At first, the skin may react with dryness, stinging, redness, or flaking. It is not an allergy: it is retinization, the phase in which the skin adapts to the accelerated renewal cycle.

How to introduce it without causing damage: two evenings a week for the first two weeks, then every other evening. After a month, you can increase the frequency, and if redness appears, take a step back. For very reactive skin, the "sandwich" method works: moisturizer, retinol, moisturizer — it slows absorption without cancelling out the effectiveness.

Two non-negotiable rules: retinol is used only in the evening, and it is photosensitizing, so sun protection the following day is mandatory. Using it without SPF means taking one step forward and three steps back.

Avoid using these on the same evening: AHA and BHA exfoliating acids and harsh scrubs. Retinol should be combined with moisturizing and soothing products, not with other刺激.

When retinol is not the right choice

Not all skin types tolerate it. It is not recommended during pregnancy and breastfeeding, should be used with great caution on rosacea and couperose, and on sensitive skin with an already compromised barrier, it risks worsening the condition instead of improving it.

Bakuchiol: what the data says

Extracted from the seeds of Psoralea corylifolia, bakuchiol is the most extensively studied alternative. A 2018 randomized clinical study compared the two active ingredients over twelve weeks: both significantly reduced wrinkles and hyperpigmentation, but the bakuchiol group reported far fewer side effects — less burning and less peeling.

Bakuchiol is not photosensitizing, so it can also be used in the morning, always under sun protection.

The LeLang choice: why we do not formulate with retinol

It is worth saying openly: you will not find retinol products in the LeLang range. Not because it does not work — the evidence is there and it is solid — but because we chose a different path.

Our distribution runs through pharmacies and often targets reactive, mature, or hormonally changing skin, where the skin barrier is already under pressure. In that context, an active ingredient that requires weeks of adjustment and rigorous commitment to sun protection is often the best way to make people abandon their routine.

So we work toward the same goals with better-tolerated active ingredients:

• Biomimetic peptides, starting with Matrixyl, act as cellular signals for collagen synthesis, without irritation or photosensitization.
• Mandelic acid supports turnover with the largest and best-tolerated molecule among the alpha hydroxy acids.
• Niacinamide works on skin tone, redness, and the barrier at the same time.

This isn’t a stance against retinol. If you use it and tolerate it well, continue: it’s an excellent active ingredient. This article exists to help you use it correctly—and to tell you what to do if your skin can’t tolerate it.

The supporting routine

If you’ve chosen to use retinol, these three steps reduce the risk of irritation.

Affinity cleansing

The skin should be cleansed while keeping its hydrolipidic film intact. A cleansing oil dissolves makeup and impurities without leaving the skin feeling tight.

Soothing ingredients and barrier support

Thermal water, panthenol, bisabolol, and aloe vera help reduce reactivity during the first few weeks.

Sun protection, without exception

It’s the step that makes everything else worthwhile.

Frequently asked questions

What does retinol do for the face?

It accelerates cell turnover and stimulates collagen production. The result is brighter skin, a more even texture, softened fine lines, and less noticeable dark spots. The first visible changes appear after 8–12 weeks of consistent use.

Does retinol need to be used every day?

No, especially at first. Start with two evenings a week for the first two weeks, then every other evening. Only after a month or more, if your skin is responding well, should you consider daily use. Increasing too quickly is the mistake that leads people to stop using the product.

What are the contraindications of retinol for the face?

It is not recommended during pregnancy and breastfeeding. It should be used with caution in cases of rosacea, couperose, active dermatitis, or a compromised skin barrier. It also causes photosensitivity, so daily sun protection is required. If in doubt, consult a dermatologist.

Is retinol or peptides better?

They work in different ways. Retinol accelerates cell turnover and has the largest body of accumulated evidence, but it requires an adjustment period and diligent sun protection. Signal peptides such as Matrixyl, on the other hand, signal fibroblasts to produce new collagen: results are slower, tolerability is much better, and there is no photosensitization. In well-designed routines, they can be used together, with the retinoid in the evening and peptides in the morning; for reactive skin, it is advisable to start with peptides.

What can you use instead of retinol during pregnancy?

Pregnancy is the time when retinoids should be put on hold, but there is no need to give up an active routine. Bakuchiol, biomimetic peptides, niacinamide, vitamin C, and azelaic acid remain available; the latter is often used during this phase for the hormonal hyperpigmentation associated with melasma. Retinol can be resumed after breastfeeding, starting again at the initial frequency.

What should you apply to your face after retinol?

A moisturizing and soothing cream containing ceramides, panthenol, or niacinamide. Avoid exfoliating acids, scrubs, and acidic-form vitamin C on the same evening. The following morning, use broad-spectrum sunscreen.

Does bakuchiol really work like retinol?

Available studies show comparable results for wrinkles and hyperpigmentation, with significantly better tolerability. However, the research on bakuchiol is much less extensive than that on retinol, which remains the active ingredient with the largest body of accumulated evidence.