The aim of this study was to assess the effectiveness of the herbal medicines used to treat patients who suffer from the type1 diabetes mellitus, to identify the common anti- diabetic herbs in use and to describe the processing methods used to extract the final product ofthese anti- diabetic herbs by the patients in Goma city. It was a longitudinal and prospective study of a cohort of 402 diabetic patients' men and women, aged 15 years and above, living in urban, semi- urban and rural areas of the Goma city in DRC.It requested information on body weight, BMI, Glycaemia and the Glycosylated...