10 Ingredients to Avoid for Sensitive Skin

Sensitive skin often reacts to certain substances in skincare products. Common symptoms are redness, itching or dryness. To avoid reactions like these, you should steer clear of these 10 ingredients:

• Fragrance: A common cause of allergies and irritation.
• Alcohol: Dries out the skin and weakens its protective barrier.
• Sulfates: Strip away natural oils and irritate the skin.
• Essential oils: Can disrupt the pH and trigger inflammation.
• AHAs (fruit acids): Encourage dryness and increase sensitivity to light.
• Retinoids: Often cause dryness, flaking and redness.
• Chemical UV filters: Can cause itching and burning.
• Preservatives: Isothiazolinones and formaldehyde releasers are particularly problematic.
• Dyes: Synthetic varieties can trigger contact dermatitis.
• Silicones: Only form a superficial film – they don't care for the skin and are ecologically questionable.

Quick overview

Tip: Check the ingredients of your skincare products and do a patch test before using new products.

1. Fragrance

Checking the ingredients of skincare products carefully is important for avoiding skin reactions. Fragrances – whether synthetic or natural – can cause allergic reactions. These often show up as redness, swelling or blisters. They can also irritate the skin directly, leading to burning, itching and further redness. Both kinds of reaction impair the skin barrier and make it more sensitive to other irritants.

Expert tip: Reach for products labelled "perfume-free" or "fragrance-free", and test them beforehand with a patch test. Soothing ingredients such as aloe vera or witch hazel can be a good alternative.

Besides fragrance, there are other ingredients that can be hard on sensitive skin – including alcohol, which is found in many skincare products.

2. Alcohol

Alcohol in skincare products can be problematic for sensitive skin. It draws moisture out of the skin and weakens its natural protective barrier by removing important lipids. This makes the skin more prone to irritation and harmful environmental influences.

Ethanol, isopropyl alcohol and denatured alcohol in particular are often found in toners, cleansers and astringents. These substances are strongly drying and irritating. Look out for terms such as "Ethanol", "Alcohol denat." or "SD Alcohol" in the INCI list.

For people with sensitive skin or conditions such as eczema or psoriasis, products containing alcohol can increase the risk of skin problems. The drying effect can make existing symptoms worse and damage the skin in the long term.

There are gentle alternatives, though. Ingredients such as aloe vera, glycerin or hyaluronic acid provide moisture without putting strain on the skin. It is especially worth choosing alcohol-free options for facial toners and cleansing products. Tip: Always test new products beforehand with a patch test. Apply a small amount to the inside of your forearm and watch the area for 24 hours for any reactions.

Besides alcohol, other ingredients such as sulfates can also dry out and irritate the skin. So check the product formulation carefully to protect your skin as well as possible.

3. Sulfates

Sulfates are surfactants that are often used in cleansing products. They remove dirt and grease, but can cause problems for sensitive skin because they attack the skin barrier and can trigger irritation.

The most common ones in skincare products are Sodium Lauryl Sulfate (SLS), Sodium Laureth Sulfate (SLES) and Ammonium Lauryl Sulfate (ALS). These substances do clean effectively, but in doing so they also remove the skin's natural oils, which are important for its protective function.

SLS and ALS are often used in cleaning agents, while SLES is mainly found in shampoos and shower gels. Although SLES is considered less irritating, it can still cause problems for sensitive skin.

The effects of sulfates are similar to those of alcohol: they can dry out and irritate the skin. People with skin conditions such as eczema, psoriasis or rosacea in particular should avoid products containing sulfates.

Practical tip: When shopping, look for labels such as "sulfate-free" or "without sulfates". Instead, you can turn to products with gentle surfactants such as coco glucoside or decyl glucoside.

Avoiding sulfates and using mild alternatives helps to treat the skin gently and avoid irritation. By the way: natural ingredients such as essential oils can also irritate sensitive skin – more on that in the next section.

4. Essential oils

Essential oils may be natural, but they can put sensitive skin under a lot of strain. These concentrated plant extracts, which are often used in natural cosmetics, can damage the skin barrier, change the skin's pH and remove natural oils.

Here are some of the possible effects on the skin:

• They can throw the skin's pH out of balance.
• They remove natural skin lipids that are important for protection.
• They can cause inflammation and irritation.

Some essential oils, especially citrus oils, can make the skin more sensitive to sunlight and so intensify irritation on sun exposure.

Gentler options for sensitive skin:

• Choose hypoallergenic and fragrance-free skincare products.
• Go for plant extracts in low concentrations.

When buying products, look for labels such as "essential oil free" or "without essential oils". Products like these are often better suited to sensitive skin.

5. Alpha Hydroxy Acids (AHAs)

Alpha hydroxy acids (AHAs) such as glycolic acid and lactic acid are fruit acids that are often used for exfoliation. For sensitive skin or skin conditions such as rosacea, however, AHAs can be problematic, as they can irritate the skin and make symptoms worse. They put strain on the skin barrier, which can result in dryness and irritation.

Possible effects on sensitive skin:

• Loss of moisture in the skin
• Increased sensitivity to sunlight
• Worsening of existing skin problems

An alternative for sensitive skin is milder fruit acids such as polyhydroxy acids (PHAs). These have larger molecules, so they penetrate the skin more slowly and work more gently. If you want to try AHAs, start with low concentrations (maximum 5%) and watch how your skin reacts.

Important tips for using AHAs:

• Always use sun protection when you use AHAs.
• Start with a low concentration and reduce how often you use them if irritation occurs.
• If you have skin conditions such as eczema or psoriasis, avoid AHAs completely.

Other ingredients such as retinoids can also be challenging for sensitive skin. Pay attention to how your skin reacts to products like these.

6. Retinoids

Retinoids, which are derived from vitamin A, are known for their effect against wrinkles and acne. But with sensitive skin they can quickly become problematic. Skin irritation, increased sensitivity to light and even a worsening of existing skin problems are common.

Gentler alternatives

For sensitive skin there are alternatives that work more gently:

• Bakuchiol: A plant-based active ingredient with a comparable effect
• Niacinamide
• Vitamin C

Tips for use

If you want to try retinoids, keep these points in mind:

• Start with a low concentration (e.g. 0.25 % or 0.5 %).
• At first, apply the product only once or twice a week.
• Try the sandwich method: apply moisturiser, then the retinoid, and finally moisturiser once more.

Important notes:

• Always apply retinoids in the evening.
• Sun protection is a must during the day.
• If there is severe irritation or burning, reduce or pause use.
• Do not combine with other irritating ingredients.

Chemical UV filters can also put a strain on sensitive skin – more on that in the next section.

7. Chemical UV filters

Sun protection is important, but not every product is suitable for sensitive skin. Chemical UV filters convert UV rays into heat, which can trigger skin irritation in some people.

Possible reactions and risks

Some chemical UV filters, including oxybenzone and avobenzone, can cause problems such as redness, itching or burning in sensitive skin. People with skin conditions such as eczema, psoriasis or rosacea are particularly affected. Studies show that around 20 % of people with sensitive skin react to chemical UV filters.

Mineral options

Mineral sunscreens with zinc oxide or titanium dioxide are a good alternative. These ingredients are often better tolerated and gentler on sensitive skin.

What should you look out for?

• Products should be hypoallergenic and free from perfume.
• Additional irritants should be avoided.

Tips for use

• Apply sun protection 15-30 minutes before going out in the sun.
• Reapply every two hours and after swimming or sweating.
• Add to your sun protection with clothing and shade.

Preservatives in sunscreens can also irritate sensitive skin – more on that in the next section.

8. Preservatives

Preservatives are often suspected of triggering irritation or allergic reactions in sensitive skin. Studies show that around 10.3 % of patients with contact dermatitis react to at least one preservative. Particularly common triggers are parabens, formaldehyde releasers and isothiazolinones such as methylisothiazolinone (MIT) and methylchloroisothiazolinone (MCI). These substances are known to cause contact allergies.

Gentler options

For sensitive skin, milder alternatives are a good choice. These include phenoxyethanol, ethylhexylglycerin or plant-based preservatives such as rosemary and grapefruit seed extracts. Natural cosmetics manufacturers are increasingly turning to plant-based preservative systems and often do without synthetic ingredients.

Tips for choosing products

To avoid skin irritation, the following tips can be helpful:

• Choose products with labels such as "low in preservatives" or "suitable for sensitive skin".
• Do a skin tolerance test before using a product for the first time.
• Prefer products with short ingredient lists.

Besides preservatives, dyes can also be problematic for sensitive skin. You can find out more in the next section.

9. Dyes and colourants

Artificial dyes in skincare products are often a problem for people with sensitive skin. According to studies, around 20% of these people develop adverse reactions to cosmetic products that contain synthetic dyes.

Common problem substances

Synthetic dyes can penetrate the skin barrier and cause reactions such as itching or redness. Particularly problematic are:

Effects and alternatives

Dyes can aggravate skin problems, especially in sensitive skin. The most common reactions include:

• Contact dermatitis, an inflammatory reaction of the skin
• Increased sensitivity to external irritants
• Redness and slight swelling

Natural pigments such as beetroot, turmeric or spirulina are gentle alternatives that can create colour in skincare products without putting unnecessary strain on the skin. Avoiding dyes helps to protect the skin barrier and prevent irritation.

Choosing products

When buying skincare products, it is worth looking out for terms such as "dye-free" or "suitable for sensitive skin".

"Even small amounts of dyes can irritate sensitive skin", dermatologists emphasise in recent studies.

While dyes can put additional strain on the skin, other ingredients such as silicones also play a role. More on that in the next section.

10. Silicones

Silicones are skin-friendly in themselves and are generally considered non-comedogenic. The widespread worry that they "suffocate" the skin isn't really true – the skin gets almost all of its oxygen from the blood, not through its surface. With sensitive or blemish-prone skin, however, a dense silicone film can trap sebum, sweat and residue if you don't cleanse thoroughly. And natural skincare doesn't need them anyway.

Why silicones can be problematic

Typical silicones in products

Silicones often hide behind names such as dimethicone, cyclomethicone, phenyl trimethicone or amodimethicone. So it's worth taking a look at the ingredients.

Better alternatives

Instead of relying on silicones, you can reach for natural ingredients. Jojoba oil, shea butter, aloe vera, squalane or glycerin are gentle alternatives that care for the skin without putting strain on it.

What to look out for

When shopping, look for terms such as "silicone-free" or "non-comedogenic". According to recent studies, around 27 % of consumers value transparent ingredient labelling. With the right choice, you can support the health of your skin in the long run.

Conclusion

Sensitive skin needs skincare products that are specifically tailored to its needs. Ingredients such as dexpanthenol and niacinamide can help to strengthen the skin barrier and soothe irritation.

That is exactly what natüür is designed for: the skincare is deliberately free from parabens, artificial dyes and harsh additives, vegan and dermatologically tested – with the soothing neem leaf extract NEEMAVERA® as its base. You can read what's in it and what is deliberately left out on our Our ingredients page; you'll find the right skincare in our skincare collection. And our guide How to spot harmful ingredients in cosmetics shows you how to decode an INCI list in general and use scanner apps.

Basic rules for sensitive skin

Expert tips for daily care

Dermatologists recommend a simple skincare routine. Fewer products, but chosen with purpose, is the motto. Products declared as hypoallergenic and free from known irritants are particularly suitable.

Eco-friendly care for sensitive skin

Products that do without harsh additives are not only more environmentally friendly but also gentler on the skin. Options like these minimise unnecessary strain and support the health of sensitive skin.

With this knowledge you can prevent irritation and protect your skin in the long term. In the next section, we answer frequently asked questions about sensitive skin.

FAQs

Which ingredients should be avoided with sensitive skin?

Certain ingredients such as fragrance, alcohol, sulfates and chemical preservatives can often cause irritation in sensitive skin. Studies show that around 60 % of people with sensitive skin react to at least one of these substances.

Can natural ingredients cause allergic reactions?

Yes, natural ingredients can also trigger allergic reactions. Both synthetic and natural substances can cause contact dermatitis.

A patch test is always a good idea, even with products containing natural ingredients. The concentration of each substance plays a decisive role in how well it is tolerated.

With this knowledge you can choose products that treat your skin gently and protect it better.