Hyaluronic acid is one of the most recognized and widely used ingredients in modern skincare. But what makes it such an essential part of an effective skincare routine? Discover the key benefits of hyaluronic acid, how it works, and why it has become a must-have ingredient for healthy, hydrated skin.

What Is Hyaluronic Acid?
Hyaluronic acid is a naturally occurring molecule (more specifically, a polysaccharide) found throughout the human body, particularly in the skin, joints, and eyes. It belongs to a class of molecules known as glycosaminoglycans (GAGs), which are made up of repeating disaccharide units. This unique structure gives hyaluronic acid its most remarkable characteristic: its exceptional ability to attract and retain moisture.
Within the skin, hyaluronic acid is primarily found in the dermis, where it is an essential component of the extracellular matrix surrounding fibroblasts, the cells responsible for producing collagen and supporting the skin's structure.
As we age, the skin's natural levels of hyaluronic acid gradually decline. This loss contributes to dryness, reduced elasticity, and the appearance of fine lines and wrinkles. For this reason, hyaluronic acid has become an essential ingredient in any hydrating or anti-aging skincare routine, helping the skin maintain moisture, resilience, and a healthy-looking complexion.

The Key Properties of Hyaluronic Acid
The primary role of hyaluronic acid in skincare products is to act like a sponge, attracting and holding up to 1,000 times its weight in water while forming a moisture-retaining gel. This remarkable ability makes it one of the most natural effective hydrating ingredients available today, which is why it is widely used in moisturizing and anti-aging skincare products.
Hyaluronic acid offers several important skincare benefits:
- Deep Hydration. Products formulated with hyaluronic acid help keep the skin hydrated throughout the day, improving its overall moisture levels and promoting a fresh, healthy-looking complexion. By attracting and retaining water, hyaluronic acid also helps plump the skin, making fine lines appear less noticeable and providing a smoother, firmer appearance.
- Improves Skin Texture and Elasticity. Regular use of hyaluronic acid can visibly improve skin texture, leaving the skin smoother and firmer. These benefits are especially noticeable in mature skin, where declining moisture levels contribute to loss of elasticity and the appearance of wrinkles.
- Soothes and Comforts the Skin. Hyaluronic acid is an excellent ingredient for sensitive or irritated skin. Its hydrating and soothing properties help reduce the feeling of dryness, tightness, and visible redness, promoting a healthier, more balanced complexion.
- Suitable for All Skin Types. One of hyaluronic acid's greatest advantages is its compatibility with every skin type. Whether your skin is dry, oily, combination, or acne-prone, hyaluronic acid provides lightweight hydration without clogging pores. After all, every skin type needs proper hydration!
How Does Hyaluronic Acid Work in Skincare?
Originally extracted from rooster combs, hyaluronic acid is now primarily produced through bacterial fermentation, making it a more sustainable and widely available ingredient for cosmetic formulations. Today, it is commonly found in serums, moisturizers, face masks, and other targeted skincare treatments.
When applied to the skin, hyaluronic acid binds to water molecules, forming a protective moisture-retaining film that helps reduce transepidermal water loss (TEWL) and keeps the skin hydrated.
Hyaluronic acid is available in different molecular weights, each offering distinct cosmetic properties. However, contrary to a common misconception, even low molecular weight hyaluronic acid does not penetrate deeply into the skin. Its molecules remain too large to pass through the skin's protective barrier and reach the deeper layers.
Instead, hyaluronic acid molecules remain on the skin's surface, where they form a hydrating film that help improve skin smoothness, support hydration, and createa a visible plumping effect. Higher molecular weight forms can also provide an immediate tightening effect, leaving the skin looking firmer and smoother.
The Hyaluron Gel: Ernesi 1978's Signature Hydrating Serum
Since 2007, The Hyaluron Gel has been one of Ernesi 1978's most popular and trusted skincare products. This hydrating gel is formulated with high molecular weight hyaluronic acid, which forms a protective moisture-retaining film on the skin's surface.
This invisible layer helps lock in hydration, leaving the skin feeling soft, comfortable, and visibly smoother. Thanks to its film-forming properties, The Hyaluron Gel also provides an immediate firming effect, giving the complexion a fresher, more lifted appearance.

Its formula is further enriched with panthenol and bisabolol, ingredients known for their soothing properties that help calm visible redness and skin discomfort. Suitable for all skin types, its water-based formula also makes it suitable for oily skin and ideal for use throughout every season.
For best results, apply The Hyaluron Gel after cleansing, both morning and evening. Pair it with The Thermal Spring Toner, which can be misted onto the face either before or after applying the serum to provide an extra boost of hydration and freshness. Once the serum has been fully absorbed, follow with your favorite facial moisturizer.
Hyaluronic acid has become an essential ingredient in modern skincare, helping keep the skin hydrated, radiant, and healthy-looking.