How to start retinol:
- Choose a low-strength product.
- Use it only at night, on clean, completely dry skin.
- Apply a pea-sized amount for the whole face, avoiding the eyelids and the corners of the nose and mouth.
- Start every second or third night, and increase only as your skin tolerates it.
- Follow with moisturiser.
- Wear broad-spectrum SPF 30+ sunscreen every morning.
Expect some dryness or flaking in the first few weeks, and give it at least three months before judging results. Don't use retinoids if you are pregnant or trying to conceive. This beginner's guide explains what retinol does, which strength to pick, what to pair it with and how to avoid irritation.
What is retinol, and how does it work?
Retinol is a form of vitamin A and part of a family of ingredients called retinoids. In the skin, retinol is converted step by step into retinoic acid, the active form that binds to receptors in skin cells. This conversion is why over-the-counter retinol is gentler, and slower, than prescription retinoids, which are already in or close to the active form.
Retinoids can speed up skin-cell turnover, help unclog pores and support collagen. Mayo Clinic describes retinol as a milder type of retinoid used to help smooth wrinkles and reduce discoloration. The American Academy of Dermatology (AAD) says retinoids are a good option for:
- mild acne;
- mild pigmentation irregularities;
- mild fine lines and wrinkles.
(For vitamin A in your diet, which is a different topic, see our vitamin A explainer.)
Does retinol actually work?
The evidence is good for prescription retinoids and reasonable for retinol. In a randomised, double-blind, vehicle-controlled trial published in Archives of Dermatology, 0.4% retinol lotion was applied to one arm of 36 older adults up to three times a week for 24 weeks. Fine wrinkling improved significantly compared with the untreated arm. Skin biopsies showed increased glycosaminoglycans, which hold water, and more collagen production.
Results with cosmetic products vary. Mayo Clinic notes that over-the-counter wrinkle products often contain less active ingredient than prescription treatments and usually make only small improvements. Benefits fade if you stop.
The retinoid family, from gentlest to strongest
| Retinoid | How to get it | Strength and notes |
|---|---|---|
| Retinyl esters (e.g. retinyl palmitate) | Over the counter | Gentlest; needs several conversion steps, so effects are mild |
| Retinol | Over the counter | The beginner's standard; common strengths range from about 0.1% to 1% |
| Retinaldehyde (retinal) | Over the counter | One step closer to retinoic acid; often stronger than retinol |
| Adapalene | Over the counter in some countries (e.g. the US); prescription in others | Mainly used for acne; the NHS lists it as a prescription topical retinoid |
| Tretinoin, tazarotene | Prescription | Strongest topical options, used for acne and sun-related wrinkles; more irritation |
| Isotretinoin (tablets) | Prescription, specialist-supervised | For severe acne; requires strict pregnancy prevention |
The AAD notes that over-the-counter labels don't have to disclose the percentage of retinol. One dermatologist it quotes advises using the lowest-strength product you can find and building up slowly. If you are unsure, start with a product that is clearly marketed as gentle or for beginners.
How to use retinol: step-by-step
- Cleanse at night with a mild cleanser, then pat dry.
- Wait until your skin is completely dry. Damp skin can absorb more and get irritated.
- Use a pea-sized amount for your whole face. Dot it on the forehead, cheeks and chin, then spread it in a thin layer. Avoid the eyelids, the corners of your nose and mouth, and any broken or sunburnt skin.
- Apply moisturiser afterwards. If you have dry or sensitive skin, try the "sandwich" method: moisturiser, then retinol, then moisturiser again.
- Every morning, wear sunscreen (broad-spectrum SPF 30+), and seek shade. The AAD advises using retinoids at night only and always using sun protection during the day. See our sunscreen guide.
A beginner's schedule
| Weeks | How often | What to watch for |
|---|---|---|
| 1–2 | 2 nights a week | Mild tightness is normal; stinging or burning is not |
| 3–4 | Every third night | Some flaking around the mouth and nose is common |
| 5–8 | Every other night | If irritation builds, step back a stage |
| 9 onwards | Nightly, if tolerated | Many people stay at every other night, which is fine |
The AAD quotes dermatologists advising beginners to start every other night and build up slowly, because rushing tends to irritate the skin. Slower is always acceptable. Consistency matters more than frequency.
What to expect: the "retinization" period
- Weeks 1–6: dryness, flaking, mild redness or a slight sting are common as skin adjusts. Mayo Clinic notes that retinol irritation often lessens over time.
- Breakouts at first ("purging"): with prescription tretinoin, MedlinePlus notes that acne can get worse during the first 7–10 days before it improves. Some people notice a similar early flare with other retinoids.
- Results: for acne, improvement often starts within a few weeks to two months. For fine lines and texture, MedlinePlus says tretinoin may take 3–4 months, and up to 6 months, to show improvement. Gentler over-the-counter retinol may take as long or longer.
Stop and let your skin recover if you develop burning, persistent redness, swelling or peeling patches. Keep moisturising, then restart less often once your skin is calm.
What to pair with retinol, and what to space out
| Combination | Verdict for beginners |
|---|---|
| Retinol + moisturiser (ceramides, glycerin, hyaluronic acid) | Great; reduces irritation |
| Retinol at night + sunscreen in the morning | Essential |
| Retinol + niacinamide | Usually well tolerated; niacinamide may calm skin |
| Retinol + AHAs/BHAs (glycolic, salicylic) on the same night | Avoid at first; use them on different nights, if at all |
| Retinol + benzoyl peroxide | Can be irritating; ask a dermatologist (some prescription products are formulated together) |
| Retinol + scrubs, peels or waxing | Avoid; stop retinoids for several days before facial procedures or waxing, as advised by your clinician |
For prescription tretinoin, MedlinePlus advises not using other topical products such as benzoyl peroxide, salicylic acid, hair removers or astringents unless your doctor tells you to. It's a useful rule of thumb for any retinoid while your skin adjusts.
Who should be careful, or skip retinol?
- Pregnancy, trying to conceive or breastfeeding: both the AAD and Mayo Clinic say retinoids should not be used during pregnancy. Ask your doctor about alternatives such as azelaic acid. Mayo Clinic describes bakuchiol as a gentler plant-based alternative that works like retinol.
- Very dry skin, eczema or skin allergies: the AAD says these people are probably not good candidates.
- Lots of redness or inflammation: this may be rosacea, which needs different treatment. See a dermatologist.
- Darker skin tones: retinoids work well, but the AAD warns that irritation can leave dark marks (post-inflammatory hyperpigmentation). Go slowly and stop if your skin becomes inflamed. Our guide to managing uneven skin tone has more tips.
- Moderate to severe acne, scarring or hormonal acne: the AAD advises seeing a dermatologist before trying a retinoid on your own.
Common beginner mistakes
- Starting with a high strength or using it every night from day one
- Using more than a pea-sized amount ("more is better" does not apply)
- Applying it on damp skin or right after exfoliating
- Skipping sunscreen
- Combining several new actives in the same week
- Giving up after two weeks, before benefits can appear
- Ignoring a damaged skin barrier. If your skin stings with plain moisturiser, pause actives and repair first; see our article on barrier repair.
Frequently asked questions
At what age should I start using retinol?
There is no fixed age. Teenagers and young adults may use retinoids for acne, often under a doctor's guidance. For fine lines and sun damage, many people start in their late 20s or 30s. Daily sunscreen matters more than starting retinol early.
Can I use retinol every night?
Eventually, many people can, but only after building up gradually over several weeks. Using it every other night long-term is perfectly reasonable if your skin prefers that.
Can I use retinol in the morning?
It's best used at night. The AAD advises nighttime use because retinoids can make skin more sensitive to the sun. Some retinoids are also less stable in light.
Is retinol safe for sensitive skin?
Sometimes. Choose the gentlest product, use it once or twice a week, buffer it with moisturiser and patch-test first. If you have rosacea, eczema or very reactive skin, ask a dermatologist before starting.
What's the difference between retinol and tretinoin?
Retinol is an over-the-counter cosmetic ingredient that the skin converts into retinoic acid. Tretinoin is prescription retinoic acid itself. It is stronger and better studied, but more irritating.
Can retinol remove dark spots?
Retinoids can help mild pigmentation irregularities over months, according to the AAD, especially alongside daily sunscreen. Stubborn conditions such as melasma usually need a dermatologist's plan.
Disclaimer: This article is for general information only and is not medical advice. Skin differs from person to person. Patch-test new products, and consult a dermatologist or doctor for persistent, painful or worsening skin problems, or before using active ingredients if you are pregnant, breastfeeding or on prescription treatment.
Related reading on HorizonDesk
- Sunscreen made simple: how to choose and use it
- Why skincare routines are all about barrier repair
- Gentle ways to manage a tan and uneven skin tone
- Vitamins and minerals explained: vitamin A
