What is Arginine HCl?

Arginine HCl is a form of the amino acid L-arginine, which is a building block of proteins. In cosmetics, it's used for its hydrating and skin-supporting properties.

How does Arginine HCl benefit the skin?

It acts as a humectant, drawing moisture into the skin, and is involved in the skin's natural repair processes and collagen synthesis, which can improve skin elasticity and reduce the appearance of fine lines.

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Arginine HCl

Also known as: L-Arginine Hydrochloride

Arginine HCl is the hydrochloride salt of the amino acid L-arginine. In skincare, it functions as a humectant, helping to attract and retain moisture in the skin. It also plays a role in skin repair and collagen production, contributing to overall skin health.

Amino acidVegan

BenefitGood 2.5 / 4

Hydration i2.8 / 4

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

Texture i1.5 / 4

Whether it can improve smoothness and surface texture — roughness, flaking, clogged pores, or unevenness. Exfoliating acids, retinoids, and smoothing moisturizers may score here.

Soothing i1 / 4

Whether it can calm the skin — linked to less redness, irritation, discomfort, or visible reactivity.

Uv protection i0.5 / 4

Whether it provides direct protection against UV radiation.

RiskVery low 0 / 4

Rated by SpottyLabs' ingredient methodology, independent of brands.

What it helps with

improves skin hydration
supports skin repair
aids collagen production

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Products with Arginine HCl

Eucerin

UreaRepair PLUS 10% Urea Lotion

4.6/ 521/7/4

Eucerin

UreaRepair PLUS 5% Urea Hand Cream

4/ 517/6/4

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Frequently asked questions

What is Arginine HCl?: Arginine HCl is a form of the amino acid L-arginine, which is a building block of proteins. In cosmetics, it's used for its hydrating and skin-supporting properties.
How does Arginine HCl benefit the skin?: It acts as a humectant, drawing moisture into the skin, and is involved in the skin's natural repair processes and collagen synthesis, which can improve skin elasticity and reduce the appearance of fine lines.