The leaves of four plant foods commonly consumed in Nigeria namely Gnetum africanum (Igbo name: Ukazi), Gongronema latifolium (Igbo name: Utazi), Telfaria occidentialis (Igbo name: Ugu), Ocimum gratissimum(Igbo name: Nchoanwu), were each screened for the presence of known potential chemopreventive agents using paper chromatography, thin layer chromatography and various chemical tests. All four…