Dear Editor, We would like to comment on the article "In vitro effects of two bioactive compounds, gallic acid and methyl gallate, on urolithiasis" [[1]]. Urolithiasis is common among thalassaemia patients and it is usually associated with reduced bone mineral density [[2]]. Therefore, we conclude that the obesity indices reported by Lee et al may not be applicable in all patients with urolithiasis, in particular those with thalassaemia.