bro your a little light to be starting the juice.
if you only weigh 140 then it only because of 3 reasons
1. your under the age of 20
2. you haven't work-out for more than 1 year
3. you haven't educated yourself in prop nutrition and bodybuilding
now if you are under 1 of the 3 you do not need steriods.
if you are 1 of the 3 then steriods will not help you as much as you expect it to, and may cause more harm then good!!!