Ingredient review
Anethole
INCI: ANETHOLE
Anethole adds a sweet, licorice-like scent to products but can be irritating for sensitive skin at higher concentrations.
In plain English
Anethole is the compound that gives anise and fennel their characteristic licorice smell. In skincare, it's used mainly as a natural fragrance ingredient. It also has some mild antimicrobial effects, meaning it can help reduce certain bacteria on the skin. However, because it's a strong aromatic, it can cause irritation or allergic reactions in some people, especially if used in high amounts or on sensitive skin.
Quick decision guide
Useful, but context matters
Anethole can be useful, but watch for some irritation potential.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Anethole.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Anethole is a phenylpropanoid compound naturally present in essential oils of anise, fennel, and star anise. It is responsible for the sweet, licorice-like aroma of these plants.
How it works
In cosmetic products, anethole functions primarily as a fragrance ingredient, providing a pleasant scent. It also exhibits mild antimicrobial activity, which can help preserve the product or reduce surface bacteria on the skin, though it is not a primary preservative.
Pros
Natural fragrance
Anethole provides a sweet, licorice-like scent derived from natural sources, appealing to those who prefer botanical aromas over synthetic perfumes.
Mild antimicrobial effect
Research suggests anethole can inhibit the growth of certain bacteria and fungi, which may help keep the skin surface cleaner when used in cleansers or masks.
Cons and cautions
Irritation potential
Anethole is a known skin sensitizer; at concentrations above 1% in leave-on products, it can cause redness, itching, or contact dermatitis, especially for those with sensitive skin.
Strong scent
The distinctive licorice aroma can be polarizing and may clash with other fragrance notes, limiting its use in complex formulations.
Best for
- People who enjoy natural, herbal fragrances in their skincare
- Those without fragrance sensitivities looking for a mild antimicrobial boost
Use caution if
- Individuals with sensitive or reactive skin
- Anyone with a known allergy to anise or fennel
Usage tips
Safety summary
Anethole is considered safe for most people when used in low concentrations in cosmetics, but it can cause skin irritation or allergic reactions in sensitive individuals. The International Fragrance Association (IFRA) sets usage limits to minimize sensitization risks.
Research notes
Studies confirm anethole's antimicrobial and antifungal properties, but evidence for significant skincare benefits beyond fragrance is limited. Most research focuses on its oral and food applications.
Common label clues
- Typical concentration
- Typically used at 0.1% to 1% in leave-on products, higher in rinse-off
- Regulatory status
- Anethole is generally recognized as safe (GRAS) by the U.S. FDA for use in food, but in cosmetics it is regulated as a fragrance ingredient and must be listed on the label if present above certain thresholds.
- Common uses
- Fragranced products, Cleansers, Masks
- Environmental note
- Anethole is typically extracted from anise or fennel plants via steam distillation, a relatively low-impact process, but large-scale cultivation can involve pesticide use.
Good to know
- Anethole is also used as a flavoring agent in foods and beverages, such as licorice candy and absinthe.
- In high concentrations, anethole can have a numbing effect, which is why it's sometimes used in oral care products.
Common questions
What is Anethole in beauty products?
Anethole is the compound that gives anise and fennel their characteristic licorice smell. In skincare, it's used mainly as a natural fragrance ingredient. It also has some mild antimicrobial effects, meaning it can help reduce certain bacteria on the skin. However, because it's a strong aromatic, it can cause irritation or allergic reactions in some people, especially if used in high amounts or on sensitive skin.
What does Anethole do in a beauty product?
In cosmetic products, anethole functions primarily as a fragrance ingredient, providing a pleasant scent. It also exhibits mild antimicrobial activity, which can help preserve the product or reduce surface bacteria on the skin, though it is not a primary preservative.
Is Anethole safe for most people?
Anethole is considered safe for most people when used in low concentrations in cosmetics, but it can cause skin irritation or allergic reactions in sensitive individuals. The International Fragrance Association (IFRA) sets usage limits to minimize sensitization risks.
Who should be careful with Anethole?
Individuals with sensitive or reactive skin Anyone with a known allergy to anise or fennel
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.