Ingredient review
Licorice Root Prenylflavonoids
INCI: Glycyrrhiza Uralensis Root Prenylflavonoids
A gentle, plant-derived antioxidant that helps calm redness and even out skin tone without irritation.
In plain English
This ingredient comes from the root of a type of licorice plant. It contains special compounds called prenylflavonoids that work as antioxidants, meaning they help protect your skin from damage caused by things like pollution and UV rays. It also has a soothing effect, which can reduce redness and inflammation, and it may help fade dark spots over time. Unlike some harsh brightening ingredients, it is very gentle on the skin.
Review score
Safety, usefulness, and evidence
Strong fit for many routines
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- natural
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Easy yes for most routines
Licorice Root Prenylflavonoids is generally a lower-concern ingredient when the full formula suits your skin.
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 Licorice Root Prenylflavonoids.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
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
A group of bioactive compounds extracted from the root of Glycyrrhiza uralensis (Chinese licorice), specifically the prenylated flavonoids that give the plant its anti-inflammatory and antioxidant properties.
How it works
It inhibits enzymes involved in inflammation (like COX-2) and melanin production (like tyrosinase), reducing redness and helping to prevent hyperpigmentation. Its antioxidant activity neutralizes free radicals that can cause premature aging.
Pros
Gentle brightening
Helps fade dark spots and uneven tone without the irritation common with stronger brighteners like hydroquinone.
Calms redness
Reduces visible redness and inflammation, making it great for sensitive or acne-prone skin.
Cons and cautions
Mild effect
Results are gradual and less dramatic compared to stronger active ingredients, so patience is needed.
Rare allergy risk
Though very uncommon, people with a licorice allergy may experience contact dermatitis.
Best for
- People with sensitive or reactive skin
- Those looking to brighten dark spots or even skin tone
- Anyone wanting a gentle antioxidant in their routine
Use caution if
- Individuals with known allergy to licorice or related plants
Usage tips
Safety summary
Considered very safe for topical use. Rare allergic reactions have been reported, but it is generally non-irritating and non-comedogenic.
Research notes
Multiple in vitro and small clinical studies support its antioxidant, anti-inflammatory, and tyrosinase-inhibiting effects. Larger human trials are limited but consistent with these findings.
Common label clues
- Typical concentration
- 0.1% to 2% in leave-on products
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. Not regulated as a drug.
- Common uses
- Serums, Moisturizers, Eye creams, Brightening treatments
- Environmental note
- Licorice root is a renewable plant source, but overharvesting can be a concern. Look for sustainably sourced options when possible.
Good to know
- This ingredient is often listed under the broader INCI 'Glycyrrhiza Glabra (Licorice) Root Extract' on some labels, but prenylflavonoids are a more specific active fraction.
- It is stable in most formulations and does not require special pH or packaging.
Common questions
What is Licorice Root Prenylflavonoids in beauty products?
This ingredient comes from the root of a type of licorice plant. It contains special compounds called prenylflavonoids that work as antioxidants, meaning they help protect your skin from damage caused by things like pollution and UV rays. It also has a soothing effect, which can reduce redness and inflammation, and it may help fade dark spots over time. Unlike some harsh brightening ingredients, it is very gentle on the skin.
What does Licorice Root Prenylflavonoids do in a beauty product?
It inhibits enzymes involved in inflammation (like COX-2) and melanin production (like tyrosinase), reducing redness and helping to prevent hyperpigmentation. Its antioxidant activity neutralizes free radicals that can cause premature aging.
Is Licorice Root Prenylflavonoids safe for most people?
Considered very safe for topical use. Rare allergic reactions have been reported, but it is generally non-irritating and non-comedogenic.
Who should be careful with Licorice Root Prenylflavonoids?
Individuals with known allergy to licorice or related plants
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.