What is retinol in skincare?
Retinol is an over-the-counter retinoid – a vitamin A derivative that your skin converts into retinoic acid, the biologically active form. Once converted, it binds to receptors in the skin and signals cells to turn over faster, ramp up collagen production and normalise the way pores shed keratin.
That combination is why retinol is one of the most studied active ingredients in modern skincare, and why it sits at the centre of most dermatologist-designed anti-ageing routines. Strengths typically range from 0.01% to 1%, and lower concentrations used consistently often outperform high strengths used sporadically.
What skin concerns does retinol treat?
Retinol works on several concerns at once: fine lines and wrinkles, loss of firmness and crepey texture, uneven skin tone, dark spots and post-acne pigmentation, enlarged or congested pores, and both hormonal and adult acne.
Because it acts on cell turnover rather than on the skin’s surface, results build over weeks rather than days. Most people see visible change between eight and twelve weeks of consistent nightly use, with continued improvement well beyond that.
What ingredients are best paired with retinol?
Pair retinol with hydrating, barrier-supporting ingredients – hyaluronic acid, ceramides, niacinamide, squalane and peptides – to offset the dryness, flaking and redness that can come with faster turnover. Apply it at night, and wear a broad-spectrum sunscreen every morning, since retinol makes skin more sun-sensitive.
Avoid layering it in the same step as AHAs, BHAs or benzoyl peroxide unless your routine has been built to handle it, and introduce it two or three nights a week before going nightly. Want to know which retinol strength suits your skin? Take our Skin Quiz.
What are acne scars?
Acne scars are permanent changes in skin texture left behind after inflammatory acne damages the dermis. They fall into two families: atrophic scars, which sit below the surface as ice-pick, boxcar or rolling depressions, and hypertrophic or keloid scars, which sit raised above it.
What most people call scarring is often post-inflammatory hyperpigmentation or erythema – flat brown or red marks with no texture change. Those fade on their own; true atrophic scars do not.
What causes acne scars?
Scarring happens when inflammation reaches deep enough to destroy collagen and the repair process either lays down too little (atrophic) or too much (hypertrophic). Deep nodular and cystic lesions carry the highest risk.
Delaying treatment, picking or squeezing, and prolonged inflammation all increase the odds. Genetics play a large part in who scars and how, which is why two people with identical acne can heal very differently.
What ingredients are best for acne scars?
For flat marks, ingredients that speed turnover and calm pigment work well: retinoids, vitamin C, niacinamide, azelaic acid, alpha arbutin and AHAs, with daily SPF to stop marks darkening again.
For true textural scarring, topicals can soften but not erase – retinoids and peptides help remodel collagen over months, while in-clinic options like microneedling, resurfacing and subcision do the heavy lifting. Preventing new inflammation is the highest-value step. Take our Skin Quiz.
