What it is
Lysine is an essential amino acid, meaning the body cannot produce it on its own and must obtain it through diet or topical formulations. It plays a central role in protein synthesis, tissue repair and immune function.
How it works in skin health
Lysine supports the skin in several complementary ways. It helps stabilise collagen fibres, which strengthens the skin’s architecture and contributes to firmness and resilience. This makes it a quiet but valuable ingredient in both facial and body formulations aimed at supporting elasticity, especially in dry or stressed skin.
Its role in wound healing is also important. Lysine contributes to tissue repair and helps the skin recover from irritation, breakouts or minor abrasions. This is one reason it appears in barrier-supportive creams and soothing formulations for hands and body, particularly in winter when the skin is more vulnerable to cracking and dehydration.
Lysine is also linked to managing cold sores. When taken orally, it can help reduce the frequency of outbreaks by interfering with the activity of arginine, an amino acid that the herpes simplex virus relies on. Topically, lysine-based balms can help calm the area and support recovery, though consistency matters more than speed.
In everyday skincare, lysine is often paired with other amino acids or humectants to boost hydration and reinforce the barrier. It works quietly behind the scenes, helping maintain structure, support repair and keep skin feeling stronger, smoother and more comfortable across the face, hands and body.
