Polyester-7 is a synthetic polyester polymer used in cosmetic formulations primarily as a film-forming agent that improves spreadability, wear, and the sensory feel of products such as sunscreens, makeup, and lotions. It is considered a formulation/base ingredient rather than a biologically active treatment ingredient.
| Reported effect | How often | Notes |
|---|---|---|
| Mild skin irritation | Rare | Occasional transient redness or irritation reported, typically in sensitive skin or under occlusion. |
| Contact allergy / sensitization | Very rare | Allergic contact dermatitis is uncommon; polyester polymers are generally considered low-sensitizing. |
| Comedogenicity / pore congestion | Rare | Film-forming polymers may rarely contribute to a sense of clogged pores in acne-prone individuals depending on the full formulation. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.