BIOLOGIQUE RECHERCHE Serum Yall-O2 1.0 fl oz / 30 ml

A hydration elixir on two weights of hyaluronic acid.

Sérum Yall~O2 combines high- and low-molecular-weight hyaluronic acids with a kale-derived concentrate, so it works on the surface and inside the upper layers of the epidermis at the same time. The brand's testing shows skin moisture significantly raised for several hours after application. Skin feels more supple and looks visibly plumper; over time, softer and more comfortable.

Key benefits

• High- and low-molecular-weight hyaluronic acids together
• Moisture significantly increased for several hours after application
• Works on the surface and within the upper epidermis
• Leaves skin more supple and visibly plumper

Why it works

Hyaluronic acid occurs naturally in the skin, filling the space between epidermal cells to plump it and guard against dehydration. In cosmetics it comes in two forms that do different jobs: high molecular weight stays on the surface and forms a film that stops water evaporating, while low molecular weight is small enough to go deeper and support the skin's own reserves. Using both is the point.

How to use

Morning and evening, at the end of the routine or before foundation.

1. Apply to the face, neck and décolleté
2. Avoid contact with the eyes. External use only

Suits

Dehydrated skin.