Laurdimonium Hydroxypropyl Hydrolyzed Wheat Protein

Laurdimonium hydroxypropyl hydrolyzed wheat protein is a cationic, quaternized hydrolyzed protein used mainly in hair/skin conditioning at low concentrations, and it is generally tolerated on intact skin. However, cationic conditioning agents can be more irritating than nonionic humectants, and hydrolyzed wheat proteins carry a non-zero risk of allergy/sensitization in susceptible individuals—particularly those with eczema or barrier compromise—so I rate it as mild with occasional sensitivity possible. Safety Notes: This cationic, quaternized hydrolyzed wheat protein is typically used as a conditioning/deposition aid in hair conditioners, masks, leave-in sprays, and 2-in-1 shampoos, with many mass-market products using it around 0.1–0.5% active for slip and antistatic benefits. At the low end (~0.05%), it appears in light rinse-off shampoos or as a minor component of a conditioning complex/blend. High-strength consumer products (intensive masks/leave-ins marketed for damage repair or strengthening) can reach ~1–3% active, with higher levels generally limited by feel, build-up, and potential irritation rather than specific global concentration caps for this INCI.