Glossary

Hyaluronic acid

Also known as: Sodium hyaluronate, hyaluronan, HA

In short

Hyaluronic acid is a sugar molecule that skin makes naturally and that binds water. In skincare it draws moisture into the surface of the skin, so skin looks plumper and feels smoother straight away.

Why do some products list several hyaluronic acids?

Hyaluronic acid comes in different forms and molecule sizes, such as sodium hyaluronate, hydrolyzed hyaluronic acid and potassium hyaluronate. Larger molecules stay on the surface for a smooth, dewy feel, while smaller ones sit in the upper layers of the skin. Several KAHI formulas combine nine forms.

How do you use it?

Apply hyaluronic acid to damp skin, then seal it in with a moisturiser or a balm, so the water it holds stays where you want it. A balm stick is the last step: see how to use a multi balm stick.

Where you'll find it

EssenceSkin Fit Blending Essence

A silky capsule essence that melts into skin

£32.99

See the full ingredients
Sheet maskWater Full Face Mask

Six soaked cotton sheet masks, one a week

£27.99

See the full ingredients
Face mistCollagen Mist Ampoule

Cooling collagen mist, over or under make-up

£37.99

See the full ingredients

Frequently asked questions

Is hyaluronic acid suitable for oily skin?

Yes. It is light and water-based, so it suits most skin types, including oily and combination skin.

Can I use hyaluronic acid with a balm stick?

Yes. Apply your hyaluronic acid essence or serum first, then glide the balm on last to help hold in moisture.

Sources and references

  1. Hyaluronic acid: a key molecule in skin aging. Papakonstantinou E. et al., Dermato-Endocrinology, 2012.
  2. CosIng database of cosmetic ingredients: Sodium Hyaluronate. European Commission.