Science
Mechanism of Action
As a key constituent of the skin's Natural Moisturizing Factor within the stratum corneum, Serine optimizes water activity and corneocyte plasticity. It functions by binding water, thereby enhancing skin hydration without promoting occlusion, and contributes to a smooth skin texture. Beyond humectancy, Serine supports the skin's NMF by encouraging ceramide production, aiding in the biosynthesis of extracellular lipids vital for skin structure, and potentially stimulating collagen synthesis as a glycine precursor. It also contributes to healthy keratinocyte turnover for natural exfoliation and renewal of the outermost skin layer, further promoting skin elasticity and supporting the skin's immune response.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Serine demonstrates high water solubility and maintains neutrality within typical formulation pH ranges, facilitating its seamless integration without compromising pH-sensitive actives. It primarily exists in a zwitterionic state at physiological pH (~7.4) and at its isoelectric point of 5.68, aligning well with skin-friendly product pH values of 5.3-6.0.
Safety
Safety Profile
As a naturally occurring component of human skin and a non-essential amino acid produced endogenously, Serine is rigorously assessed as safe for cosmetic applications by the CIR Panel. Its safety profile is further reinforced by its listing with the FDA as a food additive for flavor enhancement and as a nutrient supplement.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Serine is a valuable skin-identical amino acid, foundational for maintaining optimal hydration, supporting skin barrier integrity, and contributing to overall skin health and elasticity through its multi-faceted biological roles.
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