Skin Conditioning

Hydrolyzed Milt Extract

INCI: HYDROLYZED MILT EXTRACT

Reviewed by Emma · Last updated 14 Aug 2026

A fish-derived protein extract that supports skin hydration and conditioning

Best For Skin Types

All, Dry, Sensitive, Mature

Addresses

Dryness, Hydration, Barrier repair

Usage Frequency

Daily

What Is Hydrolyzed Milt Extract?

Hydrolyzed milt extract is a protein-derived ingredient sourced from fish milt, which is processed through hydrolysis to break down proteins into smaller, more bioavailable amino acids and peptides. This process makes the ingredient easier for the skin to absorb and utilise.

In skincare formulations, hydrolyzed milt extract functions primarily as a skin conditioner. It works to support the skin's moisture balance and may help improve the overall texture and feel of the skin barrier.

How It Works

The hydrolysis process breaks down fish milt proteins into peptides and amino acids—molecular-weight compounds that can penetrate the outer layers of skin more effectively than intact proteins. Once absorbed, these components act as humectants and conditioning agents, drawing moisture into the stratum corneum and helping to maintain skin hydration.

Additionally, the amino acids may support the skin's natural repair processes and contribute to the maintenance of skin firmness and elasticity through their role in collagen and keratin synthesis.

Clinical Evidence & References

Hydrolyzed milt extract is used primarily as a traditional skin-conditioning agent in cosmetic formulations, though dedicated clinical studies on this specific ingredient are limited. The ingredient's mechanism—protein hydrolysis and amino acid delivery—is well-established in skincare science, and similar fish-derived peptides have shown promise for hydration and barrier support in preliminary research.

More robust clinical evidence would help clarify the extent of its benefits when used at typical cosmetic concentrations. For now, it is best regarded as a supplementary hydrating and conditioning ingredient rather than a primary active treatment.

How to Use

Hydrolyzed milt extract is typically used as one component of a broader skincare formulation rather than a standalone treatment. It is well-suited to serums, moisturisers, and essence-type products. There are no specific usage restrictions; it can be incorporated into both morning and evening routines as part of your regular skincare regimen.

Safety & Precautions

Hydrolyzed milt extract is generally well-tolerated by most skin types. Those with fish allergies or sensitivities should patch test before use, as the ingredient's marine origin may trigger a reaction in susceptible individuals.

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