There was a time when I bought skincare because my mother used the brand. That was pretty much the extent of my research. In my 30s, I was a pharmacy-skincare girl. If it was made by a big brand, came in a nice bottle and promised hydration, radiance or “anti-ageing”, I was reasonably convinced. I didn’t know what an active ingredient was, I didn’t know what concentration meant and I certainly wasn’t standing in the skincare aisle turning bottles around and studying the ingredients as though I was about to sit a chemistry exam.
Then I turned 40, and somewhere along the way I discovered actives. Now I want to know what is actually in my skincare. In fact, I’ve become mildly suspicious of skincare that doesn’t contain an active ingredient. There are, of course, exceptions. If I’ve just had a CO2 CoolPeel and my skin barrier is having a small existential crisis, I’m not interested in throwing retinol and acids at it. At that point, my skincare goals are less about reversing ageing and more about convincing my skin that everything is going to be okay.
But when my skin is behaving normally, I want products that are actually doing something. And that is why I think one of the most useful things you can learn in your 40s is how to stop reading the front of the skincare bottle and start reading the back.
The front of the bottle is selling you the dream
Skincare brands are incredibly good at making us feel that we need a particular product. They give us phrases like “youth-renewing”, “radiance boosting”, “advanced anti-ageing complex”, “powered by vitamin C” and “exclusive peptide technology”. Sometimes there is a picture of a woman with impossibly smooth skin looking serene in a field of flowers, presumably because she has never had to assemble school lunches at 6.30 in the morning.
It all sounds impressive. But very little of it tells me what I actually want to know.
If a serum is shouting “VITAMIN C” at me from the front of the bottle, I want to know what form of vitamin C it contains and, if the brand discloses it, how much. If it is marketed as a retinol serum, I want to know whether the concentration is given. If it is a peptide product, I want to know which peptides are actually in the formula. The phrase “contains peptides” is interesting, but it isn’t the same as giving me useful information about the formula.
This is probably the biggest change in how I shop for skincare now. I don’t automatically believe that a product is impressive because the packaging tells me it is impressive. I turn the bottle around and start asking questions.
The word “contains” is doing a lot of work
One of the things I wish I’d understood when I was younger is that a product can technically contain an ingredient without that ingredient necessarily being present in a concentration that makes it the star of the formula.
This is where percentages become important. If a brand tells you that a serum contains 15% vitamin C, you have useful information that you don’t have when another product simply says “with vitamin C”. That doesn’t automatically mean the 15% product is better, because the form of the ingredient, the formulation and its stability all matter. There isn’t one universal percentage that makes every active ingredient effective, and higher isn’t automatically better.
But knowing the percentage gives you something very valuable: information with which to compare products.
The ingredients list can also give you some clues. Cosmetic ingredients are generally listed from highest to lowest concentration, although ingredients present at 1% or less can be listed in a different order. That doesn’t mean you can look at the back of a bottle and work out the exact percentage of every ingredient. You can’t. But it does mean you can start becoming much more discerning about what brands are actually telling you.
And that, for me, is the difference between understanding skincare and simply being marketed to.
Vitamin C is a perfect example
Vitamin C is one of the ingredients I genuinely want in my skincare. It is an antioxidant and has evidence behind its use for concerns such as pigmentation and signs of skin ageing. But vitamin C isn’t one single ingredient in the way the marketing sometimes makes it sound. There are different forms of vitamin C, and they can behave differently in a formulation. L-ascorbic acid is the classic form you’ll see in many serums, while other products use vitamin C derivatives.
So if I see a beautiful bottle proclaiming itself to be a vitamin C serum, I’m no longer particularly impressed by the words “vitamin C”. I want to know which form I’m getting, whether the brand tells me the concentration and where the ingredient sits within the overall formula.
This is why I think percentages are worth understanding, without becoming obsessed with them. A disclosed percentage can tell you something meaningful about a product, but it isn’t the only thing that determines whether a formula is good. A well-formulated product at a sensible concentration can be far more useful than something with an enormous percentage that irritates your skin.
Don’t assume the most expensive product is the most powerful
This is where I think skincare marketing gets particularly interesting.
I love beautiful skincare. I am not going to pretend otherwise. There is something deeply satisfying about a heavy glass bottle sitting on your bathroom counter looking as though it has a trust fund. But I’ve stopped assuming that expensive means effective.
A luxury product may absolutely be worth the money. You might be paying for sophisticated formulation, stability, research, delivery technology, beautiful textures, packaging or simply the pleasure of using it. There is nothing wrong with any of that. What I don’t think we should do is assume that the price tag itself is evidence of potency.
A €100 serum isn’t automatically better than a €30 serum simply because it costs more. A famous brand isn’t automatically better than a smaller one. And, sadly, a gold lid is not an active ingredient.
Sometimes a big brand creates an enormous belief around a product through years of advertising, beautiful campaigns and clever language. We start to associate the brand with efficacy, which makes the product feel more sophisticated before we’ve even looked at the ingredients.
Meanwhile, another brand might put something much less glamorous on its packaging: “15% L-ascorbic acid.” It isn’t nearly as sexy as “our revolutionary vitamin C complex”, but it gives me information I can actually use.
I’m not saying the cheaper product is automatically better. I’m saying I want to be able to make that decision based on the product rather than allowing the price and the marketing campaign to make it for me.
“Exclusive complex” sounds impressive. But what does it mean?
This is another reason I now turn the bottle around.
You will often see skincare products promoting an “exclusive complex” or “proprietary technology”. Sometimes there is genuinely interesting science behind these formulations. But the marketing name itself doesn’t tell you enough to decide whether the product is worth buying.
Take peptides. A product might proudly announce that it contains an “advanced peptide complex”, which sounds wonderfully scientific. But which peptides? At what concentration? What is known about those particular peptides? Is the brand giving you enough information to understand what you’re actually getting?
The same principle applies to almost every fashionable skincare ingredient. I don’t need a brand to convince me that an ingredient sounds sophisticated. I want to know what is actually in the bottle.
I’ve become much less impressed by the name of an ingredient and much more interested in the formula behind it.
The actives I actually look for in my 40s
There isn’t a single ingredient that suddenly becomes compulsory when you turn 40. Your skin doesn’t receive a birthday notification saying, “Congratulations, you’ve unlocked retinol.” But there are certain ingredients that I pay much more attention to now because they have a genuine role in addressing the things I care about.
Vitamin C is one of them, particularly for antioxidant protection, pigmentation and overall brightness. Retinoids, including retinol, are another. Retinoids have a strong history in dermatology and can help with skin texture, pigmentation and the appearance of fine lines and wrinkles. They can also be irritating, which is why I think the concentration and the way you introduce them into your routine matter much more than simply finding the strongest product you can buy.
Niacinamide is another favourite because it is such a useful all-rounder. It can support the skin barrier and is commonly used in products targeting uneven tone, redness and oiliness. It doesn’t have quite the same glamorous reputation as retinol or vitamin C, but sometimes the quiet ones are the most useful.
Hyaluronic acid is another ingredient you’ll see everywhere, although I think the marketing has occasionally turned it into something it isn’t. It is a useful humectant that helps attract and retain water, so it can make skin feel more hydrated and look plumper. That’s great, but hydration isn’t the same thing as reversing every sign of ageing. I like hyaluronic acid. I just don’t expect it to single-handedly take me back to 27.
Then there are peptides, which I find interesting for their potential role in supporting the appearance of ageing skin, although I am much more interested when a brand tells me which peptides it is actually using rather than simply writing “PEPTIDE TECHNOLOGY” across the front of the bottle.
Exfoliating acids such as glycolic and lactic acid can also be useful for texture and pigmentation, while salicylic acid is particularly helpful for congestion and breakouts. The important thing with these ingredients is remembering that more is not automatically better. There is a strange tendency in skincare to assume that if one active is good, five must be fantastic. Your skin barrier may have a different opinion.
The ingredients I don’t automatically fear
This is where I think the internet has made skincare unnecessarily complicated.
There are endless lists telling us which ingredients we must avoid, often because the ingredient has a long name that sounds vaguely threatening. I don’t think that’s a particularly useful way to understand skincare. A complicated chemical name doesn’t automatically make an ingredient bad, just as an ingredient with a beautiful botanical name doesn’t automatically make it good.
What matters is the formulation, the purpose of the ingredient, the evidence behind the claim and, perhaps most importantly, whether your skin tolerates it.
If my skin is sensitive or irritated, I am more cautious about potentially irritating ingredients, including fragrance and strong actives. And if my skin barrier has been compromised, particularly after a treatment, I don’t care how impressive the serum sounds. That is not the moment for me to prove how committed I am to skincare.
Sometimes your skin needs retinol.
Sometimes it needs ceramides and a moisturiser.
Knowing which situation you’re in is part of becoming better at skincare.
The biggest mistake is thinking more actives means better skincare
This is something I have had to learn the hard way.
Once you discover actives, it is incredibly easy to become greedy. You find vitamin C and decide you need it immediately. Then you discover retinol. Then peptides. Then glycolic acid. Then you see a serum containing niacinamide and think, well, I might as well add that too.
Suddenly your evening skincare routine requires a spreadsheet.
The goal isn’t to own the greatest number of actives. It is to use the right ingredients consistently and in a way your skin can tolerate. Dermatologists also caution against piling on multiple anti-ageing products at once because irritation can actually make your skin look worse rather than better.
This is particularly important in your 40s because effective skincare isn’t necessarily aggressive skincare. Sometimes the smartest thing you can do is give your skin exactly what it needs and leave the rest alone.
So what should you actually look for on the back of the bottle?
I don’t read every ingredient anymore. I simply start with what the product claims to do and then look for the ingredients that are supposed to deliver that result.
If it is a vitamin C serum, I look for the actual form of vitamin C and whether the concentration is disclosed. If it is a retinol product, I look for the retinoid and see whether the brand tells me how much is in it. If it is a moisturiser, I’m more interested in hydration and barrier-supporting ingredients than whether the brand has managed to cram twelve fashionable actives into one bottle.
I also ask myself whether I actually need what the product is selling me. If I’m already using a retinol, an exfoliating acid and a vitamin C serum, I probably don’t need another product promising to “renew” my skin simply because the bottle is beautiful.
And then there is the question I think we should all ask more often: what am I actually paying for?
If two products are both designed to deliver a similar benefit, I want to know whether the difference in price is coming from a better formula, better research, better delivery system and a product I genuinely prefer to use, or whether I’m simply paying for a very expensive marketing machine.
And then there is SPF
There is one part of my skincare routine where I don’t need a complicated active ingredient story to convince me.
Sunscreen.
If you’re spending money on vitamin C, retinol, pigmentation treatments and expensive moisturisers, protecting your skin from UV exposure needs to be part of the conversation. Broad-spectrum SPF 30 or higher is recommended by dermatologists, and consistent sun protection is one of the most important things you can do to reduce premature skin ageing.
It isn’t glamorous. Nobody is going to look at you applying your sunscreen and whisper, “She really understands skincare.”
But sometimes the boring things are the things that work.
I don’t need to understand everything. I just need to ask better questions.
I don’t blame my 30-something self for not knowing any of this. She was doing what most of us do. She bought the brands her mother trusted, believed the claims on the front of the bottle and assumed that if a product was expensive and called itself anti-ageing, it probably knew what it was doing.
Now I turn the bottle around.
I want to know what active is actually in there, which form it is, whether the concentration is disclosed and whether the product’s claims make sense. I want to know whether the formula suits my skin and whether I’m paying for something genuinely useful or simply a very convincing story.
And I’m not saying you need to become an ingredients expert. I still don’t know what half the words on the back of my skincare bottles mean. I just know which ones make me stop and look a little closer.
Because the older I get, the less interested I am in being impressed by skincare.
I want to be informed.
And if a brand wants me to spend twice as much for its “revolutionary” serum, that’s fine.
It just needs to turn the bottle around and tell me why.