Retinol: the most talked-about ingredient in skincare. Here's the honest version.

There is more misinformation about retinol than almost any other skincare ingredient. It's either presented as a miracle that will solve everything, or something so potent and dangerous that most people are terrified to start. The reality is more useful than either of those versions and once you understand what retinol actually does, how to introduce it, and what it can and can't achieve, it becomes one of the most straightforward additions to a good skincare routine.

At Glooped in Brislington, Bristol, retinol comes up in almost every skin consultation I do. Here's what I actually tell people.

What retinol is and how it works

Retinol is a form of vitamin A. It works by binding to receptors in the skin and speeding up cell turnover the process by which the skin sheds old cells and produces new ones. When you're young, this cycle happens roughly every 28 days. As you age, it slows down significantly. Retinol essentially prompts the skin to behave more like younger skin in this respect.

The results of consistent retinol use over time include:

• Improved skin texture — smoother, more refined surface as dead cells turn over more efficiently

• Reduced appearance of fine lines and wrinkles — through stimulation of collagen production in the dermis

• More even skin tone — by interrupting the melanin production that causes dark spots and pigmentation

• Reduced congestion — by preventing the buildup of dead skin cells inside pores

• Overall brighter, more vital-looking skin — the accumulated result of all of the above

These results are not instant. They build over months of consistent use. Retinol is one of the most evidence-backed ingredients available in over-the-counter skincare but the evidence is for consistent, long-term use, not a dramatic overnight transformation.

Why retinol causes purging and sensitivity and what that means

Almost everyone who starts retinol experiences some form of adjustment period. This can include dryness, flaking, mild redness, and sometimes an initial increase in breakouts. This is not your skin reacting badly to retinol. It is your skin accelerating its cell turnover which brings congestion and dead cells to the surface faster than usual.

This is called purging, and it typically lasts between two and six weeks. It is temporary, and it is not a reason to stop.

What it is a reason for is going slowly. The biggest mistake people make with retinol is starting too strong, too often, and then giving up when their skin reacts. The skin needs time to acclimatise. Introduce it gradually and the adjustment period is far more manageable.

What purging is not: persistent redness that doesn't settle, a rash, or a significant inflammatory reaction. If retinol is causing sustained irritation beyond dryness and the occasional flake, that's a sign the formula is too strong or the introduction was too fast not that retinol doesn't work for you.

How to introduce retinol properly

This is where most people go wrong, and it's worth being specific.

Start low. Begin with the lowest available concentration — typically 0.025% to 0.1%. Higher concentrations are not more effective at this stage; they're just more likely to cause irritation before the skin has adapted.

Start slow. Use retinol once a week for the first two weeks. Then twice a week for the next two to four weeks. Then build from there based on how your skin is responding. The goal is to reach consistent use, eventually three to five times a week for most people, but there is no rush.

Use it at night only. Retinol degrades in sunlight and increases the skin's sensitivity to UV damage. It should always be applied as part of an evening routine, never in the morning.

Apply it to dry skin. Applying retinol to damp skin increases absorption and therefore increases the chance of irritation, particularly when you're starting out. Cleanse, wait a few minutes for the skin to dry fully, then apply.

Follow with a good moisturiser. Retinol can be drying. Applying a barrier-supporting moisturiser immediately afterwards helps manage this, particularly in the early weeks.

Never skip SPF. Retinol use makes the skin more sensitive to UV damage, even when applied the night before. Daily SPF is non-negotiable when you're using retinol — morning, every morning, year-round.

What retinol can and can't do

Retinol is genuinely excellent at what it does. But it's worth being clear about its limits.

What it can do: improve texture, support collagen, reduce the appearance of fine lines, fade pigmentation over time, reduce congestion, and produce a general improvement in skin quality that accumulates over months and years of consistent use.

What it can't do: replace professional treatment for significant skin concerns. Retinol works at the skin's surface and upper layers — it cannot reach the dermis where real structural change happens. For significant collagen loss, deep pigmentation, scarring, or skin that needs more than gradual surface improvement, professional treatments like microneedling or chemical peels go further.

The best results almost always come from combining a good home routine, retinol included, with professional treatment that works at the level products can't reach. The two are not alternatives to each other.

Retinol and different skin concerns

For ageing and fine lines: retinol is the most evidence-backed over-the-counter option available. Consistent use over six to twelve months produces visible improvement in texture and fine lines.

For pigmentation and uneven tone: retinol works, but slowly. A vitamin C serum used alongside it speeds the process. Professional peels can accelerate results significantly.

For acne and congestion: retinol's ability to prevent the buildup of dead skin cells inside pores makes it genuinely useful here. It's one of the few ingredients that addresses both the surface appearance and the underlying cause.

For sensitive skin: retinol can be used on sensitive skin, but it requires a more cautious introduction — lower concentration, less frequency, always buffered with a moisturiser. If you have rosacea or a significantly compromised barrier, it's worth getting professional advice before starting.

When to get professional advice

If you've tried retinol and had a persistent reaction, if you're not sure which strength to start with, or if you want to know how retinol fits into a broader skin plan for your specific concerns that's exactly what a skin consultation at Glooped is for.

Retinol is not a mystery, but it does work better when it's introduced correctly and used alongside the right things. A thirty-minute conversation about your skin, what you're using, and what you want to achieve will give you more clarity than months of trial and error.

• What does retinol actually do to skin?

  Retinol speeds up cell turnover — the rate at which your skin sheds old cells and produces new ones. This improves texture, stimulates collagen production, fades pigmentation, reduces congestion, and produces a general improvement in skin quality over consistent long-term use. Results typically become visible after eight to twelve weeks, with more significant change after six months of regular use.

• Why does retinol make skin peel and purge?

  Retinol accelerates cell turnover, which brings dead skin cells and congestion to the surface faster than usual. This causes temporary dryness, flaking, and sometimes an initial increase in breakouts — known as purging. It typically lasts two to six weeks and is a normal part of the skin's adjustment period, not a sign that retinol isn't right for you. Going slowly with the introduction significantly reduces the severity of this phase.

• How do I introduce retinol into my routine?

  Start with the lowest available concentration and use it once a week for the first two weeks. Build to twice a week, then three times a week over the following four to six weeks, based on how your skin responds. Always apply at night to dry skin, follow with moisturiser, and use SPF every morning without exception. One new product at a time — don't introduce retinol alongside other new actives.

• Can I use retinol if I have sensitive skin?

  Yes, with care. Choose a low concentration, introduce it very slowly, and always follow with a barrier-supporting moisturiser. Avoid using it on the same evenings as exfoliating acids. If you have rosacea or a significantly compromised skin barrier, it's worth getting professional advice before starting — a skin consultation at Glooped will help you work out whether retinol is right for your skin and how to introduce it safely.