Only for S4 bro, OSTA has no known sides.
And honestly, and this goes for everyone,
sides are completely person dependent. I ran my SARMS cycle for 8 weeks at 50 mg per day in one dose without taking days off and I did not receive any side effects except for minor ones on the very last few days. However, you will see guys posting in my logs saying that they received sides at 40 mg-, and Gamer here in this great thread has said 75 mg+ is when sides normally occur......
It really is all body dependent and there is no way for you to know what a safe dose is for you without trying it. (and by the way, I had a short lived hypothesis that it was dependent on body weight or composition, but that has nothing to do with it.)
Here is my S4 log if anyone needs a first hand experience:
http://www.elitefitness.com/forum/bodybuilding-supplements/liffalots-sarms-s4-log-740071.html
I know this thread says that S4 is more for cutting and OSTA is more for bulking, but it has been my experience that the SARMS are pretty all purpose.....I ran a lean bulk with S4 and gained between 8 and 10 pounds (solid too, didn't lose any afterwards.)
Figure there could be some useful info in there...
And Gamer, great thread bro!