Hello, I took L-glutamine capsules for about a month in November last year, a low (I think) dose of 1500mg a day. I stopped taking it because I developed a funny sort of cough which does not want to go away 3 months later. Is it likely that the cough may have been caused by glutamine or is it just a coincidence? Also, if someone's cough is a side effect of glutamine, does it ever go away if the supplement is stopped or is it permanent? Thank you.