How to Read Cosmetics Reviews? A Critical Approach to Product Opinions

“The best cream I've ever used!” — writes an influencer with flawless skin. “A disaster, nothing but breakouts” — comments someone just below. Who's right? Probably both. And you won't know how your skin will react until you look deeper than the stars in a review.

Why cosmetics reviews are unreliable

1. Skin is individual

What works for one person can be a catastrophe for another. The differences come down to:

• Skin type — dry, oily, combination, normal. A cream that saves dry skin may clog the pores of oily skin.
• Sensitivity and allergies — one person tolerates essential oils, another develops contact dermatitis.
• External conditions — climate, diet, stress, hormones, other products you use — everything affects the outcome.
• The skin microbiome — everyone has a unique bacterial flora that shapes how their skin responds to ingredients.

The takeaway: one person's opinion is an anecdote, not proof. Even 100 positive reviews don't guarantee a product will work on your skin. Check the details in our ingredient encyclopaedia.

2. The placebo effect and expectations

Studies show that the very act of using a new, expensive cosmetic makes people rate their skin more positively — even if the product doesn't contain active ingredients at an effective concentration. That's the placebo effect, reinforced by:

• Price — more expensive = “it must be better”.
• Packaging — an elegant bottle inspires more confidence than a plastic tube.
• Marketing — promises of “visible results in 7 days” set your expectations.

How to spot sponsored content

Not every sponsored review is a lie — but you need to be aware that a conflict of interest exists. Here's what to watch out for:

Red flags

• No #ad, #partnership or #sponsored disclosure — it's a legal requirement in many countries, but plenty of people skip it.
• Exclusively positive reviews — a credible reviewer also mentions the downsides.
• An affiliate link or discount code — the reviewer earns money from your purchase.
• Identical opinions across multiple profiles — they may come from a marketing agency.
• A review posted the same day as the product launch — too soon for any real results.

Green flags

• The reviewer discusses the ingredients — not just texture and scent.
• They mention their skin type and the conditions of use.
• They state how long they tested it — a minimum of 4–6 weeks for active ingredients.
• They compare it with similar products — they don't claim it's “the only one of its kind on the market”.
• They talk about the drawbacks — no product is perfect.

Ingredient analysis vs reviews — which tells you more?

Reviews are subjective. The formula is objective. The INCI list (International Nomenclature of Cosmetic Ingredients) will tell you:

• Whether the product really contains the active ingredients it claims — if hyaluronic acid sits at the end of the list, its concentration is minimal.
• Whether it contains potential allergens — essential oils, dyes, preservatives such as MI/MCI.
• Whether the formula matches the promises — a “natural” cream with silicones at the top of the list is a marketing ploy.

Learn to read the ingredient list yourself — read our guide to the INCI list. And if you want to quickly check a specific product, use the PurScore search engine.

How to use reviews wisely

1. Look for patterns, not single reviews

If 30% of reviews mention irritation — that's a signal, even if the rest are positive. Look for recurring observations rather than extreme opinions.

2. Filter by skin type

A review from someone with dry skin about a moisturising cream is only relevant to you if you also have dry skin. Many platforms let you filter reviews — use that feature.

3. Pay attention to specific descriptions

“Great cream!” tells you less than “I've been using it for 2 months, I have combination skin, the cream doesn't clog my pores, the texture is light and absorbs in 30 seconds.” Specific descriptions are far more valuable.

4. Check independent sources

Compare reviews from different platforms — pharmacy, drugstore, forum, blog. If a product has nothing but 5 stars on the manufacturer's website but mixed opinions on independent platforms — that speaks for itself.

5. Prioritise the formula over reviews

Instead of reading 50 reviews, spend 5 minutes analysing the ingredients. Browse the face cream rankings on PurScore, where products are rated on their formula rather than subjective opinions.

Fake reviews — how to recognise them?

• Overly generic wording — “Excellent product, highly recommend!” without any detail.
• Unnatural language — it reads like marketing copy, not a real experience.
• All reviews within a short window — a sudden flood of 5-star reviews over a single week.
• The reviewer has only one review — an account created solely to write that one review.
• Stock photos instead of genuine pictures of the product.

Summary

Cosmetics reviews can be a helpful starting point, but they should never be the only criterion for your choice. The individuality of skin, sponsored content and the placebo effect make reviews inherently subjective. Analysing the ingredients is the only objective way to evaluate a cosmetic — and that should be your first step.