Ingredient Encyclopedia

Welcome to the Ingredient Encyclopedia

Discover what’s inside your skincare — from retinol to aloe vera — with clear guides on benefits, uses, and safety.

Ingredient Encyclopedia

Ensulizole (Phenylbenzimidazole Sulfonic Acid) – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 11, 2025
Ensulizole (Phenylbenzimidazole Sulfonic Acid) is a lightweight UVB-protective sunscreen filter known for its non-greasy feel and clear finish. Ideal for oily and combination skin, it offers strong sunburn protection but may irritate sensitive or reactive skin. This guide explains its benefits, side effects, safety concerns, who should use it, who should avoid it, and how to layer it correctly for maximum protection.