Fibre is a diverse group of complex carbohydrates that are intrinsic and intact in plants and are not absorbed or digested in the small intestine. [1,3]
It is found abundantly in plant-based sources and is an essential nutrient to keep the digestive system in good working order.
Also, there is enough conclusive evidence to show that consuming recommended intakes of fibre can help reduce the risk of chronic diseases. [1,2,3]
Fibre is commonly classified as soluble, which dissolves in water, or insoluble, which doesn’t dissolve in water.
Soluble fibre can help lower blood glucose cholesterol levels, whereas, insoluble fibre can help food move through our digestive system and help prevent constipation. 
Inadequate fibre intake doesn’t induce biochemical or clinical symptoms as it is not an essential nutrient and isn’t stored in the body. However, lack of fibre intake can cause inadequate faecal bulk and may detract from optimal health.