Benzyl alcohol in skincare: what it does and when to avoid it

What does benzyl alcohol do in skincare?

Benzyl alcohol has several formulation roles, which makes its name on the label more of a staff listing than a beauty promise. It can help preserve a product, act as a solvent or contribute fragrance. Preservatives in cosmetics containing water help prevent bacterial or fungal growth. Benzyl alcohol is also used as a local anaesthetic in topical and pharmaceutical preparations, but its appearance on a skincare label does not mean the product is intended to numb skin.14

Benzyl alcohol occurs naturally and can also be made synthetically. Another name for it is benzenemethanol. It appears in products including face and body creams, cleansers, lip balms and sunscreens.3

A 2008 survey of 276 moisturizers available at Walgreens in Chicago found benzyl alcohol in 65 products, or about 24 percent. That describes ingredient use in that particular collection, not the percentage of people who reacted to it. Product ingredients and actual allergy are different questions.5

Is benzyl alcohol safe in skincare?

The safety question depends on concentration and exposure, not just whether the name appears on a label. Health Canada's draft assessment proposes that prolonged skin application of certain products with high concentrations of benzyl alcohol may affect the nervous system. The products identified include sunscreens, face and body creams, deodorants and antiperspirants. The same draft proposes that those products are not a concern when used sparingly.3

These are proposed findings, not a final assessment or a blanket ban on benzyl alcohol. Possible Canadian actions include restrictions on certain cosmetics and reducing the permitted concentration from 3 percent to 1 percent in sunscreens and other products left on skin that are regulated as natural health products or nonprescription drugs. Those figures are a proposed regulatory change, not a concentration to choose for a homemade skincare formula.3

Who should be more careful?

Benzyl alcohol sensitisation, meaning the development of an allergy to it, has been reported in around 0.2 percent of patients undergoing patch testing. That is not a rate for all skincare users. Sensitisation is more often associated with chronic skin disease and exposure to topical medicines. A damaged skin barrier can make it easier for allergens to enter the skin.1

People with impaired skin barriers, including those with atopic dermatitis, are especially susceptible to adverse reactions from moisturizers. Facial skin can also be more sensitive to moisturizer irritation than other body areas. Sensitive skin does not identify a particular allergy: burning after application and an allergic rash need different explanations.5

Remember topical medicines as well as cosmetics when investigating a reaction. In one reported case, benzyl alcohol was present in both the patient's moist wipes and corticosteroid formulations that worsened her symptoms. An excipient, an ingredient other than the medicine's active treatment, can be relevant to contact allergy. Bring medicine names and ingredient lists to the appointment.1

How should you use a product containing benzyl alcohol?

1. 1Read the ingredient list and the product's directions before applying it.
2. 2If you have a confirmed benzyl alcohol allergy, avoid products containing it. Contact the manufacturer if the ingredient information is unclear.
3. 3Use the finished product as directed. Follow any label instructions about where to apply it, how often to use it and whether to rinse it off.
4. 4Stop using a product suspected of causing a contact reaction and keep its packaging or ingredient list for a healthcare appointment.

Benzyl alcohol's presence does not set a separate morning or evening schedule, an application order or an amount to apply. Those decisions belong to the finished product's directions. A cleanser, moisturizer and sunscreen have different purposes; do not treat a supporting formulation ingredient as though it were a separate treatment step.16

Judge benefits by the product rather than benzyl alcohol alone, which keeps a preservative from receiving the entire moisturizer's performance review. Moisturizers can make skin feel smoother and softer and improve hydration, but those effects involve the formulation's water, humectants and lipids. Finding benzyl alcohol in a moisturizer does not identify it as the ingredient responsible for hydration, just as finding it in a product that causes a rash does not identify the culprit.5

Can you trust sensitive skin and fragrance free labels?

In the US, 'hypoallergenic' has no federal definition. The same absence of a federal standard applies to 'fragrance free' and 'for sensitive skin'. To avoid a known allergen, read the ingredient panel instead of relying on those claims.6

A fragrance can be listed simply as 'fragrance' or 'perfume' in the US, so the ingredient list can have its own unnamed supporting cast. If you need to avoid benzyl alcohol and cannot tell whether a fragrance contains it, ask the manufacturer. 'Unscented' is also not the same as fragrance free: a fragrance ingredient can mask other ingredients' smells.46

What does a reaction look like, and when can it appear?

These are general cosmetic reaction patterns, not a way to diagnose benzyl alcohol allergy at home. Irritation can appear within minutes or hours after a strong irritant, or after days or weeks of repeated exposure to a weaker one. Allergic contact dermatitis, an immune reaction causing skin inflammation, usually develops more than 12 hours after contact and peaks around 48 hours. It can cause intense itching, redness and swelling. A cosmetic allergy can develop even after years of uneventful use.4

Do not look only for a bright red rash. Contact dermatitis can appear purple, deep brown or greyish in richly pigmented skin. Burning, stinging, soreness, scaling, swelling or blisters are also relevant symptoms to describe to a clinician.2

When should you see a doctor?

Seek assessment for a rash that keeps returning, is severe, covers a large area or does not respond to treatment. A dermatologist can arrange patch testing to identify a contact allergen. Patches containing possible allergens are placed on the back, removed after two days and checked again after a further two days. Testing is particularly useful when the cause is unclear or creams and ointments have not helped.2

Once an allergy is confirmed, avoiding the trigger can produce significant improvement or complete clearance. Continued exposure makes allergic contact dermatitis worse. Skin inflammation can take several months to settle, so avoiding an ingredient and recovering from the reaction are not necessarily simultaneous. Treatment can include suitable moisturizers and prescription creams chosen by a healthcare professional.2

Seek immediate medical attention for trouble breathing or swallowing, faintness or loss of consciousness after using a cosmetic. These can be signs of a severe allergic reaction and should not wait for a routine skin appointment.6