Yes, I cannot tolerate microcristaline/microcrystalline cellulose, a derivative of cellulose gum. I'm unable to tolerate any vegetable gums or their derivatives. Microcrystalline cellulose appears under many different names, i.e. croscarmellose cellulose, croscarmellose sodium, carboxymethylcellulose,
methylcellulose, hydro-ethyl methylcellulose, hydromellose...