Metformin inhibits breast cancer cell growth, colony formation and induces cell cycle arrest in vitro.
Alimova IN, Liu B, Fan Z, Edgerton SM, Dillon T, Lind SE, Thor AD. Metformin inhibits breast cancer cell growth, colony formation and induces cell cycle arrest in vitro. Cell Cycle. 2009 Mar 15; 8(6):909-15.