Trace elements are called the spark plugs of life because they are required to activate hundreds of enzymes reaction with in the body. The objective of this study was to determine micronutrient content (Fe, Cu, Mn and Zn) in O. gratissimum, O. americanum, M. spicata and A. indica by Atomic Absorption spectrophotometer (AAS). All medicinal plants are now considered as a valuable source of unique natural products for development of medicines against various diseases. Essential micronutrient in O. gratissimum is Fe (59)µg/g, Cu (29) µg/g, Zn (55) µg/g, Mn (9) µg/g, in O. americanum Fe (120) µg/g, Cu (56) µg/g, Zn (88) µg/g, Mn (21) µg/g, in M. spicata. Fe (92) µg/g, Zn (122) µg/g, Cu (125) µg/g, Mn (31) µg/g & in A. indica Cu (49) µg/g, Fe (158) µg/g, Zn (64) µg/g, Mn (18) µg/g.