Mucuna bean (Mucuna sloanei, MB) is widely cultivated as a cover crop in a traditional bush fallow system of tropical regions. Despite its protein value and high yield in Nigeria, its use is limited to grazing animals. Its physical-chemical properties may be responsible for under-utilization. Like other legumes, Mucuna bean may contain antinutrients i.e., phenolic compounds which limit their utilization for man and animals. The utilization may be increased by either modifying or removing these compounds using simple processing methods. The following studies were conducted to test the efficacy of using physical-mechanical methods to improve the nutritive value of MB for rats and by implication for other species including human beings.