What is polyglutamic acid?
Polyglutamic acid is a water soluble peptide (a type of protein) derived from the mucilage of fermented soya beans, it is a humectant, which means it attracts moisture and draws into your skin. Plus, its ‘large molecules prevent water loss by forming a film over the top layer.
Polyglutamic acid skin benefits
Looking across air pollution, central heating, seasonal changes and lifestyle habits (such as drinking alcohol, consuming caffeine), there are a vast variety of factors that can contribute to dehydrated skin, and often without us even realising it.
Dehydrated skin is often itchy, sensitive, dull and tired, and appears to have accelerated signs of ageing, such as fine lines and wrinkles. As well as, say, drinking enough water, you should also look to minimise water loss through your skin – and this is where polyglutamic acid comes in.
Often described as a ‘super-hydrator’ and impressively, it can hold up to 5,000 times its own weight in water.
What’s the difference between polyglutamic acid and hyaluronic acid?
Hyaluronic acid has long been hailed as a hero-hydrating ingredient: able to hold up to 1000 times its own weight in water, HA helps to keep skin hydrated by boosting the water content in skin cells. It occurs naturally in the skin but over time, as we age, the level of hyaluronic acid secreted begins to diminish.
Polyglutamic acid, on the other hand, is up to 10 times more hydrating than hyaluronic acid. Like HA, PHA draws water into the cells. However, PGA even goes one step further as it also seals the moisture in by forming a protective film on your skin that prevents moisture from evaporating.
In other words, hyaluronic acid will hydrate deeper into the skin, while polyglutamic acid nourishes the top layer of the skin, but also protects and plumps your skin.