ABSTRACT Karti kaning tyas, Diah. 2011. Negati ve Effe ct of Subacut ePeror al of Monoso iu! "luta!ate #MS"$ on Da !a ge of %e &a r 'e ll in (h it e )at #)at tusNover gi cus St ra in (istar$.*hesis, Meical +aculty, niversity of Muha!!aiya Malang, -visors#1$ //.. #2$ // Background : Monosodium Glutamate #MS"$ as one of the foos seasoning hich is &o&ularly knon as vetsin or micin.*he ose of MS" on the footens to be un!easureor is only baseon sense. n nonesia, MS" &rouction reaches 23.400 tons5yea r ith increas econsu!&tion by a&&ro6i!ately 23.175year . *he li!it of MS" usage on hu!an shall be ranging fro! 2.8 9.g #for boy eight 08:0 kg$. Objective : *o &rove the negative Effect of Subacute Peroral of Monosoiu! "luta!ate #MS"$ on Da!age of %e&ar 'ell in (hite )at # Rattusnovergicus strain wistar$. Research Method : *he !ethousein this research as laboratory e6&eri!entation, using *he Post *est ;nly 'ontrol "rou& Design. Sa!&le a&&liein this rese arch as hite rat # Rattus Novergicus Strain Wistar$, hich is categori<einto = grou&s. "rou& serves as control regarless MS" istribution, "rou& ith >0!g MS" istribution, "rou& ith 40 !g, an"r ou& = i th 120 !g. *he a ta as analy<e us ing the folloing te sts nor!al it y, ho!egeneity, -N;=-, avanceith *KE?, correlation anregression. Result and Discussion : *he observation on he&ar eight shos the ecreasehe&ar eight in rat if co!&ar ei th the con tr ol leconit ion in li ne i th the increaseus age of MS"