Best For Skin Types
All, Dry, Sensitive, Mature
Addresses
Usage Frequency
Daily
What Is Dihydroxypropyl Arginine Hcl?
Dihydroxypropyl Arginine HCl is a modified form of arginine, a naturally occurring amino acid. It is created through chemical synthesis to improve stability and performance in cosmetic formulations.
In skincare and haircare products, it functions primarily as a humectant and conditioning agent. It helps draw moisture into the skin and hair, and supports the maintenance of hydration levels within the outer layers of the epidermis.
How It Works
As a humectant, dihydroxypropyl arginine HCl works by binding water molecules and drawing them into the stratum corneum (the outermost layer of skin). This increases hydration within that layer, which can improve skin softness and elasticity.
The amino acid component also supports the skin's natural protein structure and contributes to its conditioning properties, helping to maintain a healthy skin barrier.
Clinical Evidence & References
Research specifically targeting dihydroxypropyl arginine HCl is limited in the published scientific literature. However, arginine and related amino acid derivatives have been studied for their humectant and conditioning properties, with evidence supporting their role in skin hydration and moisture retention.
The ingredient is considered safe for cosmetic use by major regulatory bodies, though individual clinical efficacy studies on this specific compound would strengthen the evidence base.
How to Use
Dihydroxypropyl arginine HCl is generally well-suited to daily use in serums, moisturisers, and haircare products. It pairs well with other humectants such as glycerine or hyaluronic acid for enhanced hydration. There is no need to restrict frequency unless you notice sensitivity.
Safety & Precautions
Frequently Asked Questions
From the Clinic
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Decarboxy Carnosine HCL
Biomimetic peptide (meaning it is lab-engineered to emulate a natural peptide in the body) Known for its antioxidant power and other anti-ageing effects
Decylene Glycol
A synthetic, skin-softening glycol
Diglycerin
A gentle humectant that draws moisture into the skin and supports hydration
Dihydroxypropyltrimonium Chloride
A conditioning agent that helps support skin's natural moisture balance and ion transport
Dimethylsilanol Hyaluronate
Derived from sodium hyaluronate | Has moisturising properties
Dipentaerythrityl Tetrabehenate/Polyhydroxystearate
Made by combining two fatty acids and a humectant | May be plant-derived or synthetic
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