I have run Masteron up to 28 weeks straight. In December, I had to be hospitalized for 7 days (Blood clot in my leg that developed into a small abscess.....On Vancomycin and Piperacillin / Tazobactam (ie Zosyn) - the 2 big guns to protect against MRSA and MVRSA - for 6 days straight. They ran bloodwork on me several times. My bloods were absolutely perfect - lipid panel, liver panel, kidney panel, cardio panel all were perfect, and that was after being on a Test Enan / Masteron Enan cycle for 28 weeks straight at the time. Doing tons and tons of cardio (50-60 minutes of cardio 6 to 7 days per week on the treadmill immediately after my weight workout) is an enormous benefit and probably a large reason why my bloods came back completely perfect. No alcohol, no cigs, no drugs, lots of water all day long also helps.