Chemistry in cosmetics - which ingredients are safe for your skin?

Blacklists of ingredients and articles about harmful substances in cosmetics get a lot of clicks because fear of chemical names is easy to trigger and appeals strongly to the imagination.

We ourselves have heard many times that "such an article needs to be written" – scaring people with ingredients, building an expert position on lists of bans, and contrasting them with "safe" cosmetics or perfumes. Except that is not the path we want to take. Because chemistry is not the enemy, and cosmetics is not a battlefield between "good natural" and "bad synthetic."

The text we have prepared is not meant to cause anxiety. It is meant to provide knowledge, context, and the feeling that it is truly possible to make good decisions without fear. If you don't want to be groundlessly intimidated – you are in the right place.

Will you find harmful chemical ingredients in cosmetics? - product safety in the EU

Let's start with the basics. In everyday language, the word "chemistry" often means something artificial, suspicious, or potentially dangerous. Meanwhile, chemistry is simply the science of substances and their properties. Every cosmetic ingredient – whether it comes from a laboratory or from nature – is a chemical compound. This also applies to water, oils, or plant extracts.

Cosmetic product safety in the EU is precisely regulated. The legal basis is Regulation (EC) No 1223/2009, which specifies which ingredients can be used, in what concentrations, and under what conditions a cosmetic can be sold. Every cosmetic product placed on the European Union market must undergo a safety assessment, including both an analysis of individual ingredients and an evaluation of the finished product as a whole.

The result? Legally sold cosmetics in the EU are not a random mix of ingredients. They are thoroughly tested, and harmful substances do not occur in them.

Natural vs. Synthetic Cosmetics - is it a good quality test?

In conversations about cosmetics, a simple division often appears: natural – good, synthetic – bad. This is a division that sounds intuitive and fits well with marketing slogans, but it does not reflect the reality of modern cosmetology or perfumery.

The performance of a cosmetic or perfume is not determined by whether a given ingredient is natural or synthetic, but how it was used. The dose, frequency of use, and the entire context of the formulation are of key importance, because the same substance under different conditions can act completely differently: in one case supporting the skin or scent, and in another causing discomfort.

In practice, the best cosmetics are rarely "100% natural" or "fully synthetic." Instead, they are a mixture of various raw materials, designed to utilize their strengths and limit their weaknesses. The same applies to perfumes. Although there is often talk of "natural perfumes" and "synthetic perfumes," in practice almost all fragrances are mixed compositions.

That is why the question "natural or synthetic?" rarely leads to good answers. Much more important is another: is the product well-designed, stable, safe, and tailored to the user's needs. Conscious skincare and conscious fragrance selection are not about picking sides, but about understanding how ingredients work – without ideology, without fear, and without oversimplifications.

How are cosmetic ingredients classified?

In cosmetics, we encounter very diverse raw materials, however each of them is a chemical compound, regardless of origin. Their classification helps to understand how ingredients are created, but in itself does not determine their safety.

Natural raw materials in cosmetics

Natural raw materials come directly from nature and are minimally processed. These are plant extracts, oils, butters, beeswax, or lanolin. Natural ingredients are inspiring, but they can be less durable and more susceptible to external factors, such as light, temperature, or oxygen.

Raw materials of natural origin in cosmetics (semi-natural)

Raw materials of natural origin have their source in nature, but are processed under controlled conditions to achieve more stable and predictable properties. An example is vegetable glycerin. Such processing allows for improved stability, safety, and repeatability of action, which is particularly important in modern cosmetic formulas.

Synthetic raw materials in cosmetic products

Synthetic raw materials are produced in laboratories and often do not occur in an identical form in nature. They are designed with a specific action in mind, such as smoothing the skin surface. This group includes, among others, niacinamide or modern UV filters. Synthetic raw materials are valued in the cosmetic industry for stability, long shelf life, and predictable action.

Nature-identical raw materials in cosmetics (semi-synthetic)

This type of raw material is created in a laboratory, but its chemical structure is identical to substances found in nature. An example is vitamin C or essential oils subjected to fractionation, where part of the compounds with the highest allergic potential is removed. They allow for the benefits of known natural ingredients while limiting the risk of instability or quality variability.

Where do myths about harmful cosmetic ingredients come from?

If cosmetics are subject to such precise safety rules, why do the harmful substances allegedly contained in them still stir up so much emotion, and why does the slogan "they cause skin inflammation" regularly return in subsequent articles, posts, and videos?

Language plays a huge role. For years, the word "chemical" has functioned as a mental shortcut meaning something artificial, unnatural, and potentially dangerous. In marketing and online messages, it very easily becomes a bogeyman that simplifies a complex topic into emotional slogans. Blacklists of ingredients, alarming headlines, and categorical judgments appeal to the imagination and simply get a lot of clicks.

This is precisely why cosmetic ingredients are still accused of harmful effects. One can read that they accelerate the aging process and hinder skin regeneration, can lead to contact dermatitis, cause dryness and eye irritation, and even allegedly damage the liver and cause coughing. Over time, these accusations become increasingly elaborate and dramatic – not because new evidence appears, but because it is increasingly difficult to attract attention without ramping up emotions.

Controversial content stands out from the competition because it promises access to knowledge hidden from consumers, even if in reality it is based on simplifications and information taken out of context. Just ask yourself a simple question: which would you rather read:

• “A review of harmful elements used in cosmetics ”

• “The Scientific Committee on Consumer Safety has confirmed the safety of ingredients used in cosmetics”.

An article stating that most cosmetics you find on store shelves do not show harmful effects doesn't sound as attractive, does it?

“Chemistry” functions as a convenient shortcut for everything misunderstood or causing anxiety. And the less context in the message, the easier it is to reinforce the myth that danger lurks in every name we cannot pronounce.

List of harmful cosmetic ingredients - does it currently make sense?

On the internet, it is easy to come across so-called "white" or "blacklists" of cosmetic ingredients. By design, they are meant to help choose safe products, but in practice, they often simplify the topic to the point of absurdity, throwing ingredients with completely different actions, safety profiles, and applications into one bag.

List of harmful ingredients that are banned - proof that regulations work

In history, ingredients did indeed appear in cosmetics that, from today's perspective, raise objections. Not because someone wanted to harm users, but because scientific knowledge and regulations developed gradually. What was once permissible or unquestionable is today – thanks to research and scientific progress – sometimes considered unacceptable.

This is exactly the point of the safety system: regulations are not static but evolve with new knowledge. Ingredients that raise justified doubts are restricted or withdrawn. This applies to substances such as formaldehyde, mercury compounds, or lead compounds, which were once used and are now banned.

It is worth emphasizing clearly: these substances are not present in legal cosmetics sold within the European Union. Their presence has been banned precisely because the regulatory system reacted to new scientific data. Despite this, one can still get the impression online that cosmetics still contain "dangerous ingredients from the past" – which is simply not true.

Why are "blacklists" a bad idea?

Blacklists treat ingredients in isolation from context, and it is context that determines the safety and action of a cosmetic. There is no such thing as a "good" or "bad" ingredient in itself. What determines how a given raw material affects the skin are primarily:

• concentration of the substance,

• the entire product formulation,

• method and frequency of use,

• as well as individual skin characteristics of the user.

The same ingredient can be neutral or beneficial in one formula, and in another – cause discomfort. It may be unsuitable for a pregnant woman, but fine for you. People allergic to them should not use them - but they will not harm you. Blacklists ignore these differences, which is why they rarely help in the real choice of a cosmetic.

What instead of blacklists? - how to approach cosmetics consciously

It is impossible to create one list of ingredients that would be appropriate for everyone. A much better approach is to observe your own skin's reactions and understand the context in which a given ingredient appears.

A conscious choice of cosmetics should be based on:

• knowing your own skin's needs,

• careful observation of reactions,

• understanding the role of ingredients in the formula,

• rather than on the fear of their names.

Reading ingredients with context - the INCI trap

The composition of every cosmetic product must be detailed on the packaging in the form of an INCI list. This is a list of ingredients ordered by concentration, but this list – while helpful – does not say everything. The same ingredient can act completely differently depending on the formula, concentration, and method of use. Instead of analyzing individual names, it is worth looking at the product as a whole and its intended purpose.

Match cosmetics to your situation

There are also circumstances in which skin tolerance may change. This applies to, among others, pregnancy, lactation, use of certain medications, dermatological therapies, or skin barrier disorders. In such situations, some ingredients may be inadvisable – not because they are dangerous for everyone, but because they require greater caution and an individual approach.

Find out what you are allergic to

Even substances considered safe can be perfectly tolerated by one person and cause allergic reactions in another. This does not result from their "harmfulness," but from the individual reaction of the body.

If a given substance causes burning, redness, or discomfort for you – it is a signal to stop using it, even if it looks perfect "on paper." On the other hand, if an ingredient considered controversial is well tolerated by your skin, there is no need to eliminate it just because of opinions on the internet.

This works very similarly to food allergies: people allergic to peanuts must strictly avoid them, but for the rest of society, they are not harmful.

If we tried to eliminate all ingredients that could potentially cause allergies, we would in practice have to ban almost 100% of substances used in cosmetics and perfumes.

Such an approach is much closer to real, effective, and calm skincare.

Harmful substances from "blacklists" - are they really harmful?

Many ingredients that end up on so-called "blacklists" cause controversy not because they are toxic, but because under certain conditions they may not be well tolerated by every skin. The key factor is always the context of use, not the mere presence of the ingredient in the formula.

Sodium Lauryl Sulfate and Sodium Laureth Sulfate

SLS and SLES are cleansing detergents that help combine water with fats and dirt particles. They can show irritating potential: in some people causing itching, dry skin, or rashes. When used in high concentrations, they can disrupt the hydrolipid barrier and lead to skin irritation. This does not mean, however, that they are "harmful" in themselves - their impact depends on the concentration, the entire cosmetic formula, and the frequency of use.

Parabens and other preservatives

Parabens are among the most thoroughly researched preservatives used in cosmetics. Their task is to protect the product against the growth of bacteria, molds, and fungi, and thus ensure safety of use throughout its shelf life. Both natural and synthetic preservatives are an essential element of most formulas.

Fragrance composition - allergens

Fragrance substances are one of the most common causes of allergic reactions in cosmetics, which is why specific allergens must be clearly listed in the INCI. This information does not mean, however, that a given ingredient is "bad" or that everyone should avoid it - it is a tool for people who already know that they are allergic to it.

Summary – chemistry in cosmetics

Chemistry in cosmetics is not a threat in itself – safety is determined by the method of use, concentration, and suitability for the skin. Cosmetics and perfumes available in the European Union are subject to strict regulations and are assessed for safety. Instead of succumbing to blacklists, it is better to be guided by knowledge and your own experience. If you have sensitive skin, reach for milder formulas, and choose a scent like jewelry – with pleasure, not with fear.

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