Beyond the label: how to read science-based skincare claims like a scientist

Picture this: you're standing in a pharmacy aisle with a teenager who has a breakout, a budget, and very little patience. The shelves are full of promises. Clinically tested. Dermatologist approved. Natural. Science-backed. Medical grade. Clean.

Every product looks more credible than the last. And somehow, you leave with something that may or may not work, without being entirely sure why.

This is not a failure of understanding It is a failure of context. Skincare marketing is designed to compress complex information into something that fits on a 50ml bottle. In that process, the part that matters most often gets lost: the evidence.

Here is how to read between the lines.

A claim is only as useful as the evidence behind it

"Clinically tested" is one of the most common phrases in skincare - and one of the least informative on its own. Tested how? On how many people? Over what period? What outcome was actually measured?

The strength of any scientific conclusion depends on the quality of the study behind it. A well-designed study with clearly defined, measurable outcomes tells you something useful (Farris, P.K., 2013). A vague claim tells you only that a study happened. Those are not the same thing.

This does not mean every tested product is misleading. It means "clinically tested" is a starting point, not a verdict.

Ingredients matter, but the formulation matters more

Parents and teens are more ingredient-savvy than ever. Many can rattle off niacinamide, salicylic acid, ceramides, and hyaluronic acid without blinking. That awareness is useful, but it has also created a misconception: that the ingredient list alone predicts how a product will perform. It does not.

What matters is the finished formulation: the concentration, the pH, how ingredients interact, the delivery system, and the preservative system. Two products with the same headline ingredient can produce very different results because the formulation is different (Draelos, 2022). This is why we test our finished products on real people, using real instruments - not just the ingredient list.

"Natural" does not automatically mean safe

Few words carry more weight in skincare than "natural." It suggests purity, gentleness, and trustworthiness. It is also not, scientifically speaking, a safety claim.

Many naturally occurring substances can irritate the skin, trigger allergic reactions, or cause harm at certain concentrations. Many synthetic ingredients have strong safety profiles and decades of research behind them. Whether an ingredient comes from a plant or a laboratory does not determine its risk profile. The evidence does.

A more useful question than "is this natural?" would be "is this appropriate for my teenager's skin?"

Testimonials are powerful, but they are not evidence

Humans are wired for stories. A compelling before-and-after photo will outperform a clinical paper every time in the court of public opinion. We understand why: stories are relatable, immediate, and easy to process.

The problem starts when individual stories are treated as proof.

A teenager's skin is influenced by hormones, genetics, diet, stress, sleep, medication, sport, humidity, and many other variables that a testimonial cannot account for. What cleared one person's skin may do nothing - or worse - for another. This is why controlled studies exist: to separate genuine product effects from coincidence.

We have parent reviews on our site, and we are proud of them. But they sit alongside our testing data, not in place of it.

The most useful question is: can it be measured?

At Upenya, we are guided by a simple principle: "if you can't measure it, don't mention it". Hydration can be measured. Barrier function can be measured. Changes in blemish appearance can be measured. These are the outcomes we test for, using calibrated laboratory equipment, on real people, over meaningful time periods. That is what "science-backed" should mean. Head over to our section on how we test, for more info.

The next time you encounter a skincare claim, ours included, ask what was tested, how it was measured, and what the results showed. That question is more valuable than any label.

What science-based skincare actually looks like

Science-based skincare is not a marketing phrase - it is a standard. Hydration can be measured. Barrier function can be measured. Changes in blemish appearance can be measured. Navigating skincare does not require a chemistry degree. But it does require a little curiosity. Not scepticism for its own sake, just the habit of asking: what is the evidence? The best skincare claims are not the ones shouted loudest on the packaging. They are the ones that still hold up when you ask a follow-up question.

Confidence - in a product, in a routine, in a brand - should come from evidence, not assumption, packaging, or a TikTok recommendation from someone whose skin type you do not know.

Just evidence.

References

Draelos, Z.D., (2023). Cosmetic dermatology: Products and procedures. 3^rd Edition, John Willey & Sons Ltd. ( (Accessed: 11 June 2026).

Farris, P.K., 2013. Cosmeceuticals and cosmetic practice. John Wiley & Sons. ( (Accessed: 11 June 2026).