Amino Acids
Amino acids are the building blocks of proteins like collagen and keratin, and they are commonly used in UK skincare and haircare to help hydrate, strengthen and protect the skin and hair.
How it works in skincare
In cosmetics, amino acids function as humectants, drawing moisture into the skin, while also supporting the skin’s natural barrier and helping to smooth and condition the hair shaft. They are frequently blended into serums, creams, masks and shampoos to improve texture, softness and overall resilience without irritation.
Key benefits
- Helps maintain skin hydration
- Strengthens the skin’s natural barrier
- Improves hair smoothness and manageability
- Supports a healthy-looking complexion
- Enhances product absorption and feel
- Adds shine and softness to hair
Best for
dry skin, dehydrated skin, sensitive skin, mature skin, dull skin
Where it comes from
Amino acids used in cosmetics are typically derived from plant sources such as wheat, soy, oats or rice through gentle fermentation or hydrolysis processes.
Products with Amino Acids
Not every product on UK Lips lists a full ingredient breakdown — so there may be many more formulas that contain Amino Acids than we can show here. These are the comparisons where we’ve confirmed it in the listed ingredients.