The use of plants and herbs as food supplements and medicinal additives is fast gaining grounds and recognition in the world especially in Africa. Sweet potato leaves (Ipomoea batatas) decoction is a folk remedy for asthma, bugbites, burns, catarrh, diarrhea, fever, nausea, stomach distress and tumours. Also this plant has haematinic effects and has been used in the treatment of anaemia and other related ailments. Sweet potato leaves were used to feed rabbits. Their blood samples were collected and analysed for PCV, WBC, platelet count and white cell differential count. There was a significant increase in PCV, WBC and platelet count (P<0.05) respectively. While the differential white cell count remained the same. Increase in haematological parameters after feeding with the sweet potato leave extract
may be a direct effect on haemopoietic tissues.