Humectant

Proline

Unique amino acid of collagen structure — proline makes up ~13% of collagen composition and is a key component of the triple helix structure. Topically hydrates the skin as an NMF amino acid and supports collagen fiber synthesis.

NMFCollagentriple helixMoisturizer

✓ Safe

Comedogenic Rating

0/5

Irritation Potential

0/5

What is it?

Proline (пролін, Pro) — conditionally essential cyclic amino acid. In INCI: Proline. It is one of the main building blocks of collagen (~13%) and elastin. Due to its cyclic structure (pyrrolidine ring), it effectively retains water. It is part of the skin's NMF. Hydroxyproline (modified form) is a marker of collagen metabolism.

NMF moisturizing and conditioning component in serums, creams, and products for mature skin. Often combined with glycine, lysine, and vitamin C in formulas that support the skin's amino acid profile.

Key Benefits

✦

Hydration through NMF pool

Proline is part of the natural NMF and effectively retains water due to its hydrophilic pyrrolidine ring. It replenishes the amino acid reserve of the stratum corneum, depleted by cleansing and the external environment.

◈

Key structural component of collagen

Proline and hydroxyproline are important amino acids of collagen and its triple helix structure. In topical cosmetics, proline rather supports the amino acid pool and NMF than directly "builds" new collagen in the dermis.

✧

Support for skin elasticity

Proline is also part of elastin — another key structural protein of the dermis. In complex formulas for mature skin, it is appropriate to combine it with peptides, retinoids, vitamin C, and SPF.

Suitable for

Mature skinDry skinDehydrated skinAll skin types

Main Actions

✓ NMF hydration✓ Building block of collagen✓ Support for elasticity

The amino acid does not replace collagen-stimulating actives.

Proline is important for collagen structure, but topical application of the amino acid does not equate to proven collagen stimulation. For anti-aging effect, proline is better perceived as support for NMF and formula synergy, while leaving the main work to retinoids, vitamin C, peptides, and SPF.

CategoryHumectants

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