The utilization of SNC is strongly affected by the presence of tannin and saponin as major anti-nutritional compounds. Thus, the saponin content was determined based on AOAC [24], which involved sequential extraction using acetone and methanol in a Soxhlet apparatus; while spectrophotometric method described by Burns [25] was used to estimate the tannin contents at an absorbance of 605 nm using tannic acid as the standard.