Stanislaw Rajmun Burzynski (born 1943 in Lublin, Poland), MD, PhD, is an American immigrant of Polish origin. A biochemist and physician, Burzynski has administered peptides and their metabolites, which he calls "antineoplastons", as treatments with claimed anti-cancer activity since December 1976. The clinical efficacy of these treatments, currently undergoing Phase II trials, has not been established by formal FDA Phase III trials and has been the subject of long running legal and medical controversies.