Skin Conditioning

Donkey Milk

INCI: DONKEY MILK

Reviewed by Rosie · Last updated 2 Jun 2026

A dairy-derived conditioning agent with preliminary evidence for skin hydration and barrier support

Best For Skin Types

All, Dry, Sensitive, Mature

Addresses

Dryness, Hydration, Barrier repair, Sensitivity

Usage Frequency

Daily

What Is Donkey Milk?

Donkey milk is a natural ingredient derived from donkey dairy, used in skincare formulations primarily as a skin conditioning agent. It contains bioactive compounds including proteins, peptides, and minerals that may interact with skin cells to support moisturisation and skin function.

Unlike cow's milk, donkey milk has a different protein composition and is traditionally used in some cultures for topical skincare applications. In modern formulations, it is often incorporated into creams and moisturisers to enhance hydration and skin feel.

How It Works

Donkey milk contains bioactive peptides and proteins that are thought to interact with skin cells when applied topically. Research suggests these compounds may influence fibroblast activity (the cells responsible for collagen production) and support the skin's natural barrier through effects on proteins like filaggrin, which helps maintain the structure of the outer skin layer.

When incorporated into formulations—particularly in nanoliposome delivery systems—donkey milk appears to enhance transepidermal water loss reduction and skin hydration. The exact mechanisms are still being characterised, but the ingredient's conditioning properties likely stem from its protein content and amino acid profile.

Clinical Evidence & References

Clinical research on donkey milk in skincare is emerging but limited. A small study of 15 participants found that creams containing nanoliposome-encapsulated donkey milk demonstrated satisfactory moisturising effects relatively quickly after application. In-vitro studies have suggested potential benefits for skin barrier repair following UVB exposure and effects on melanin production, though these findings require validation in human studies.

Research exploring donkey milk's effects on fibroblast signalling pathways is preliminary and conducted in controlled laboratory settings. Whilst results are suggestive of skin-beneficial activity, evidence in living human skin remains limited. More rigorous clinical trials would be needed to establish efficacy claims with confidence.

How to Use

Donkey milk is typically found in moisturising creams and serums. Use as part of your regular skincare routine according to product instructions. As with any new ingredient, introduce it gradually if you have sensitive skin and monitor for any signs of sensitivity. Products containing donkey milk are often used once or twice daily as a moisturiser or hydrating treatment.

Safety & Precautions

Donkey milk is generally well-tolerated in topical formulations. However, individuals with milk protein sensitivities should exercise caution, as cross-reactivity is theoretically possible, though donkey milk's protein profile differs from cow's milk.

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