I have been trying to identify essential elements in the human body, and looking at where and in what quantities these elements occur. Unfortunately, defined essentiality is not clear for several trace elements, judging by alternate listings I have found.Here is a listing of elements by mass in the human body. I have tried to identify what I could.Please help to improve this list. I would so greatly appreciate it!Symbols:x Almost certainly not essential?? Have seen some evidence of essentiality? Have seen more evidence of essentiality(no symbol) Probably essential__________________________ObasicCbasicHba sicNbasic_____________________Cabone; blood; muscle; heart; digestionPbone; energy processes; many othersKelectrolyte; ATP functionSmethionine; skin; liver; urinaryNaelectrolyte; ATP functionCldigestion; cell pumpMgprocessing ATP; boneFeprotein synthesis; enzymes; hemoglobin; oxygen transport??Ftooth protectionZnimportant enzymes?Sibone; connective tissuexRbxxxxSrxxx??Br???xPbxxxCuredox enzymesxAlxxxxCdxxxxCexxxxBaxxxIthyroid??Sn???xTix xx?Bbalance and absorption in bone; metabolism; brainNienzymesSeantioxidant enzymes; health; immunity?Crinsulin functionMnenzyme cofactor??As?????Li???xCsxxxxHgxxxxGexxxMooxidases CocobalaminesxSbxxx??AgimmunityxNbxxxxZrxxxxLaxxxx GaxxxxTexxxxYbxxxxBixxxxTlxxxxInxxxxAuxxxxScxxxxTa xxx??V???xThxxxxUxxxxSmxxxxBexxx??W???