Silk proteins
Silk proteins are a luxurious, lightweight ingredient derived from silk that helps hydrate and smooth skin and hair. Often listed as sericin or hydrolysed silk, they leave a soft, silky feel without greasiness. Popular in UK serums, creams, hair masks and lip products for their conditioning and protective qualities.
How it works in skincare
In cosmetics and skincare, silk proteins form a breathable, protective film on the surface of skin or hair that helps lock in moisture while improving smoothness and softness. The proteins are rich in amino acids that bind well to keratin in skin and hair, enhancing flexibility and reducing static. In UK formulations they are valued for giving a silky after-feel in moisturisers, sheet masks, conditioners and lip balms.
Key benefits
- Helps retain moisture in skin and hair
- Improves smoothness and softness
- Creates a breathable protective film
- Enhances skin and hair flexibility
- Reduces flyaways and improves manageability
- Gives a silky, luxurious after-feel
Best for
dry skin, mature skin, sensitive skin, dull skin, fine hair, damaged hair
Where it comes from
Silk proteins are obtained from the cocoons of the silkworm (Bombyx mori). The natural fibre is processed to extract the water-soluble proteins used in cosmetics.
Products with Silk proteins
Not every product on UK Lips lists a full ingredient breakdown — so there may be many more formulas that contain Silk proteins than we can show here. These are the comparisons where we’ve confirmed it in the listed ingredients.