Pistacia lentiscus (Mastic) gum
AKA: Mastic Gum
Plant-Derived Synthetic
Occlusive
Mediterranean
Clean
Pistacia Lentiscus (Mastic) Gum is a cosmetic ingredient used as film forming, masking. Rated low hazard by EWG.
CAS #
61789-92-2
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Masking
Antioxidant
Anti-Inflammatory
Antimicrobial
Creates protective layer
Provides scent
Traditional Use
Used for over 2,000 years in Mediterranean and Middle Eastern medicine and skincare. The resin was valued in ancient Greek and Roman times for its astringent and antimicrobial properties, and was traditionally used in dental and skin preparations.
Skin Types
●all-skin-types, gentle
Best For
Soothing
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
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Verified Jun 2026
Data: Kew POWO · CosIng · EWG · CIR