Cellulase is an enzyme of the hydrolase class. It is responsible for catalysing the hydrolysis of β-1 4-glycosidic bonds between glucose molecules in cellulose (a building block for plant cell walls). This reaction leads to the formation of the disaccharide cellobiose which is converted into glucose.
The human body is not capable of synthesising cellulase. Because of that, dietary fibre is not digested and used as a source of energy. Nonetheless, it has a beneficial impact on health, is essential for maintaining normal digestive function and may prevent many diseases. Because of that, it must not be excluded from the diet.
In supplementation, cellulase is most frequently an ingredient of digestive enzyme blends. It can be also found in health-promoting supplements with vegetable and fruit extracts. It is recommended especially to persons who complain of digestive discomfort after consuming fibre-rich foods.