Finally, the ratio of soluble to insoluble fibre was investigated in the onion. For an onion to be a viable food ingredient, the ratio of IDF: SDF should be close to 1:2 Unlike other vegetable, it is harder to give an overall ratio. Thus they concluded that ratio decreased from the inner to the outer tissue. The inner tissue would be more suited for use as a food ingredient; however the outer and skin tissues consisted of the greatest amount of dietary fibre and had the most potential as a fibre ingredient. Benitez et al. (2011) also characterized the dietary fibre content of the onion cultivars (‘Recas and Figueres’) and its by-products; their conclusions were in agreement with the above author’s findings.