He has a specialisation in the field of diabetology, endocrinology and internal medicine.
His scientific achievements include over 250 publications in national and foreign journals (IF> 400; MNiSW score> 6078). According to the Web of Science database, the works were cited more than 3.8 thousand times, including leading journals from the field of diabetology, immunology, endocrinology, genetics, i.e. in Diabetes, Diabetologia, Diabetes Care, Nature Genetics. Hirsch index equals 27.