Protein Milk Liquid Hydrolysed is a water-soluble cosmetic ingredient made from milk proteins that have been broken down into small peptides, so they absorb easily into skin and hair. In simple terms, it is a conditioning agent you add in small amounts to serums, creams, masks and hair products to leave skin feeling soft and hair feeling smoother.
Azlok supplies it as a semi-translucent, amber liquid meant for formulation work rather than direct use on its own. If you make your own cosmetics at home or run a small skincare label, this is one of those quiet workhorse ingredients that improves the feel of a finished product without adding weight.
What hydrolysed milk protein does in a formula
Because the proteins are hydrolysed (chopped into smaller peptides), the molecules are lighter and can sit closer to the skin and hair surface, forming a fine conditioning film. Here is what makers typically use it for:
- Skin conditioning: helps skin feel hydrated, supple and smooth, and supports a soft, youthful-looking finish.
- Elasticity and softness: the peptide film improves the surface feel of the skin, so creams and lotions feel more nourishing.
- Hair conditioning: adds slip and a smoother touch to shampoos, conditioners and hair masks, and can help reduce that rough, brittle feel.
- Lightweight texture: it is fast-absorbing and does not leave a heavy, greasy residue, which makes it useful in gel serums and light lotions.
A quick, honest note: cosmetic ingredients like this improve the look and feel of skin and hair. They are not medicines and do not cure skin or scalp conditions.
How to use it in your products
Hydrolysed milk protein is water-based, so it goes into the water phase of your formula. A few practical pointers:
- Typical dosage: most makers use it at a low percentage of the total formula. Start small, test the feel, and adjust rather than overloading it.
- Add to the water phase: blend it in with your other water-soluble ingredients. In emulsions (creams and lotions), add it to the water side before combining with oils.
- Mind the heat: proteins can be sensitive to prolonged high temperatures, so it is generally added during the cool-down phase, after heating, when possible.
- Always use a preservative: any water-containing product needs a broad-spectrum preservative to prevent mould and bacterial growth. This is non-negotiable for anything you keep for weeks.
Common finished products include leave-on serums, day and night creams, hydrating masks, shampoos, conditioners and hair masks.
Safety and good practice
- Patch test finished products on a small area of skin before regular use, especially since this is a milk-derived ingredient and some people have dairy sensitivities.
- For external cosmetic use only. Do not ingest it.
- Keep away from children and store raw ingredients out of reach.
- Work clean: use sanitised tools and containers, and label your batches with the date made.
- Check the accompanying COA and MSDS for handling details, and follow standard cosmetic formulation guidelines for your region.
Buying and storage
Azlok offers Protein Milk Liquid Hydrolysed in a wide range of pack sizes, from a 50 gm trial quantity up to bulk 20 kg for production use, with pricing starting at ₹249. If you are new to it, a smaller pack lets you test how it behaves in your recipes before committing to bulk.
- Shelf life: around 2 years when stored correctly.
- Storage: keep in a cool, dry place, tightly closed and away from direct sunlight and heat.
- Hygiene: avoid contaminating the bottle; decant with a clean spoon or dropper rather than dipping used tools.
FAQ
What is hydrolysed milk protein used for in cosmetics?
It is a skin and hair conditioning agent. Added in small amounts to serums, creams, masks and hair products, it helps skin feel soft and hydrated and gives hair a smoother, more manageable feel.
Can I apply it directly to my skin?
It is designed to be blended into a formula, not used neat. Add it to the water phase of your product along with a preservative, then apply the finished cream or serum.
How much should I add?
Use it at a low percentage of your total formula. Begin with a small amount, assess the texture and skin feel, and adjust. Overloading protein ingredients can make a product feel sticky.
Does it need a preservative?
Yes. Since it is water-based and protein-rich, any product containing it must include a broad-spectrum preservative to stay safe and stable.
Is it suitable for people with dairy allergies?
Because it is derived from milk, those with dairy sensitivities should be cautious. Always patch test the finished product and disclose the ingredient on your labels.