Hyaluronic Acid vs Glycerin: What Actually Hydrates?

Hyaluronic acid and glycerin are two of the most common hydrating ingredients in skincare. Both are humectants, which means they attract water.

Hyaluronic acid

Hyaluronic acid can hold a large amount of water relative to its weight. It is often found in serums, gels and moisturisers, and can give a light, plump feel.

Glycerin

Glycerin is a simple, well-studied humectant. It is found in many budget-friendly products and is often very well tolerated.

Which is better?

Neither is automatically better. The most important factor is the formula as a whole. Humectants work best when they are sealed in with a moisturiser that supports the skin barrier.

Why a moisturiser still matters

On dry days, humectants may draw water from deeper skin layers if the air is dry and there is no occlusive or barrier-supporting layer on top. This is why hydration is best built in layers.

Products to explore

• A hyaluronic gel such as the Hyalugel Hyaluronic Acid Gel
• A richer barrier-supporting moisturiser such as the COSRX Hyaluronic Acid Intensive Cream

Results vary. Patch-test new products.