HISTIDINE
What is HISTIDINE?
L-Histidine is a conditionally essential amino acid that serves as a precursor to histamine and is vital for maintaining skin's natural moisturizing factor (NMF), helping to regulate hydration and barrier function. In skincare, it acts as a humectant, antioxidant, and pH buffer, supporting tissue repair and protecting against environmental stressors. It is naturally present in human skin and is often used in formulations to enhance moisture retention and soothe irritation.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Humectant
Attracts and holds water in the stratum corneum, boosting hydration and plumpness; commonly used in moisturizers, cleansers, and hair conditioners.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Soothing
Helps reduce the feeling of discomfort and visible irritation by supporting skin calmness, often through anti-irritant, barrier-supporting, or cooling mechanisms.