Our hyaluronic acid comes from biotechnology: it is a natural and vegan active ingredient. There are hyaluronic acids of different sizes or molecular weights. We thus distinguish between low molecular weight, medium molecular weight and high molecular weight hyaluronic acids. Each molecule size has a specific function in the skin. The hyaluronic acid that we have selected is a new generation hyaluronic acid based on a full spectrum including these different molecular weights. It therefore allows both to perfectly meet the physiological needs for hyaluronic acid and to cover the different actions attributed to the three categories of hyaluronic acids.