Agen prunes are among the best of all fibre-rich foods (see comparative table on fibre contents).

Fibres are in roughly equal proportions, with :

1. 40 - 50 % soluble fibres :
   These have a high water retention capacity and a gentle, beneficial effect on digestion as well as on various metabolic processes, for example by reducing the glycaemic response to the ingestion of "fast" sugars and by lowering cholesterol levels
2. 50 - 60 % insoluble fibres :
   these supplement the action of soluble fibres by "mechanically" accelerating and stimulating the digestive process.