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Proline

Proline is an amino acid, a building block of proteins, naturally found in the skin. In skincare, it acts as a humectant, helping to attract and retain moisture in the skin. It also plays a role in collagen synthesis, contributing to skin's structural integrity and elasticity.

NoneAmino acidEvidence: Medium
BenefitGood 2.8 / 4
Hydration i2.5 / 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 / 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 i0.5 / 4

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

Uv protection i0.2 / 4

Whether it provides direct protection against UV radiation.

RiskVery low 0 / 4

Rated by SpottyLabs' ingredient methodology, independent of brands.

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Products with Proline

Protini Powerpeptide Resurf Serum
Drunk Elephant
Protini Powerpeptide Resurf Serum
4.7/ 544/27/6
Rice Lipids + Ectoin Microemulsion
The Ordinary
Rice Lipids + Ectoin Microemulsion
4.7/ 527/13/5
Age Perfect Serum Le Duo
L'Oréal Paris
Age Perfect Serum Le Duo
4.6/ 526/25/7
Natural Moisturizing Factors + HA
The Ordinary
Natural Moisturizing Factors + HA
4.6/ 519/21/6

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Frequently asked questions

What is proline and how does it benefit skin?
Proline is an amino acid that helps the skin retain moisture and supports the production of collagen, a protein essential for skin's firmness and elasticity.
Is proline suitable for all skin types?
Yes, proline is generally well-tolerated and beneficial for most skin types, especially those concerned with dryness, dehydration, or signs of aging.