keep in mind that Masteron does more then 'Harden' you up. It has a strong affinity to SHBG and will bind that up and free up more test and tren to work on the AR. so essentially it will make everything work better and more synergistically. you could run it the whole cycle at a moderate 500mg. when you do lean up enough at the end it will shine. for a 12 week run of mast I'd recommend mast e .
does mast work better at a lower body fat % as far as appearances are concerned, sure, but so does every other AAS. I use Mast a lot just for the SHBG affinity benefits.