The microcrystalline cellulose is a partially depolymerised purified cellulose. It is produced by the acid treatment of alpha cellulose extracted solely from non-resinous wood of guaranteed non-GM origin.

Microcrystalline Cellulose is totally insoluble in musts and is therefore defined as a technological additive with regard to legislation. Classified by the OIV in the fermentation activator category, microcrystalline cellulose cannot be used to compensate for a nutritional deficiency of Saccharomyces Cerevisiae, but its ability to detoxify the medium by facilitating the nucleation of CO₂ ensures a proper process of alcoholic fermentation.