What they are
Amino acids are the building blocks of proteins (including collagen, elastin and keratin) all of which are vital for healthy skin structure and function. Your body naturally produces some amino acids, while others must be obtained through diet or topical skincare.
In skincare, these acids are included in serums, moisturisers and body products to support hydration, repair and barrier health. They’re naturally present in the skin’s Natural Moisturising Factor (NMF), which helps maintain smooth, supple texture and prevent water loss.
How they work in skincare
Amino acids work in multiple, skin-supportive ways. First, they’re deeply hydrating, helping the skin retain moisture by attracting and binding water molecules. This keeps the skin soft and comfortable, and makes them especially valuable for dehydrated, dry or sensitive skin types.
Second, they help strengthen the skin barrier. A healthy barrier protects against irritants, pollution and moisture loss, and amino acids play a direct role in replenishing and maintaining that barrier, particularly after it’s been compromised by over-exfoliation, harsh weather or inflammation.
Certain amino acids also have specific benefits:
Arginine supports healing and collagen productionGlycine helps maintain skin elasticityProline and lysine are involved in rebuilding collagen fibresHistidine has natural antioxidant and anti-inflammatory properties
In hand care and body care, amino acids help soothe and fortify, making skin feel calmer, stronger and more resilient. They also complement actives like peptides, hyaluronic acid and ceramides for a well-rounded approach to hydration and repair.
If your skin feels tight, rough or out of sync, amino acids are a gentle yet effective way to restore balance and bring the skin back to comfort.