Hydration is one of the foundations of healthy looking skin, but with so many moisture-boosting ingredients available, it can be difficult to know which one deserves a place in your routine. Two of the biggest names in skincare are hyaluronic acid and polyglutamic acid. Both are celebrated for their ability to attract moisture to the skin, leaving it looking plumper, smoother and more radiant, yet they work in slightly different ways and offer unique benefits.
Hyaluronic acid has long been considered the gold standard for hydration thanks to its ability to bind water within the skin. Polyglutamic acid is a newer addition to many skincare formulations and has quickly gained attention for helping to lock moisture into the skin while supporting a healthy skin barrier. Rather than competing, these powerhouse ingredients often work beautifully together. Here’s how they compare and how to decide which is the best choice for your skin.
Hyaluronic Acid Delivers Deep Hydration
Hyaluronic acid is naturally found within the skin, where it helps maintain moisture and elasticity. As we age, levels gradually decline, making skin more prone to dryness and fine lines. In skincare, hyaluronic acid attracts water to the skin’s surface, helping it appear plumper and more supple. It is suitable for virtually every skin type and works particularly well for dehydrated skin that feels tight or lacks radiance. Lightweight and easy to layer with other ingredients, hyaluronic acid has become a staple in modern skincare routines thanks to its immediate hydrating benefits.
We recommend: Dermalogica Circular Hydration Serum
Polyglutamic Acid Helps Lock Moisture In
While hyaluronic acid draws water into the skin, polyglutamic acid focuses on reducing moisture loss by forming a lightweight protective film across the skin’s surface. This helps keep hydration where it is needed for longer, leaving the complexion feeling soft, comfortable and refreshed. Polyglutamic acid also supports the skin barrier, making it particularly appealing for people with dry or sensitive skin. Because it complements rather than replaces hyaluronic acid, many skincare experts recommend using products that contain both ingredients as part of a comprehensive hydration routine.
We recommend: Medik8 Hydr8 B5 Intense
Which Ingredient Is Better for Dry Skin?
If your skin feels consistently dry, flaky or uncomfortable, the answer may not be choosing one ingredient over the other. Hyaluronic acid helps replenish moisture, while polyglutamic acid helps prevent that moisture from escaping. Together, they create an effective combination that leaves skin feeling hydrated for longer. Supporting your routine with a nourishing moisturiser rich in barrier-supporting ingredients can further enhance these benefits. This layered approach is particularly valuable during colder months, after sun exposure or whenever skin feels stressed and dehydrated.
We recommend: Elemis Pro-Collagen Marine Cream Ultra-Rich
Can You Use Them Together?
Absolutely. In fact, hyaluronic acid and polyglutamic acid complement each other exceptionally well. Applying a hydrating serum followed by a moisturiser helps seal moisture into the skin, creating long-lasting hydration throughout the day. This combination also works well alongside ingredients such as ceramides, peptides and niacinamide, making it easy to build a routine tailored to your skin’s needs. Whether your concerns are dehydration, fine lines or a weakened skin barrier, combining hydrating ingredients often produces better results than relying on a single ingredient alone.
We recommend: SkinCeuticals Hydrating B5 Serum
Which One Is Right for You?
There is no clear winner because both ingredients have valuable roles to play. If your skin needs an immediate boost of hydration, hyaluronic acid is an excellent place to start. If your skin struggles to retain moisture or feels easily irritated, polyglutamic acid can provide additional support by helping strengthen the skin’s moisture barrier. Many people will achieve the best results by incorporating both into their skincare routine. By choosing products that deliver lasting hydration while supporting overall skin health, you can enjoy a complexion that feels comfortable, looks radiant and remains resilient throughout the year.
We recommend: Dermalogica Hyaluronic Ceramide Mist