You will get DIFFERING opinions on this topic seeing as SARMS is so new.
View Point #1) Yes, use it in LOW DOSE 50mg or LESS during PCT to help keep muscle and strength.
View Point #2) Some medical studies showed that higher doses (considered over 50mg) DID show some SLIGHT shut down. Obviously every person is different on when they get sides and some have ran 100mg and not seen shutdown but if you search the boards there are a good number of people that had libido issues at these higher doses and were starting to show signs of some shutdown no matter how slight. Most products that have POTENTIAL for ANY shutdown are normally not wanted in PCT, but would be better used at the END of PCT or JUST AFTER PCT in a BRIDGE till your next cycle.
Im not going to go AGAINST the FEW medical studies and several people that felt slight shut down so Im going with Option #2 but some people on here will argue that they used 100mg and were fine but remember just because SOME people didnt show signs of shutdown doesnt mean that goes for EVERYONE, so its your risk. Im running it ALONE with LIPOSHRED Stack for a little cut up before basketball and I love the stuff but around 100mg for about a week I stopped having the "desire" to have sex, my equipment still WORKED my libido was just down. I may run a 2nd bottle of SARMS at 50mg only and continue this a little long to see how much RECOMP potential the stuff has past 4 weeks.
-Legacy
PS: If you can responsibly keep it at 50mg without wanting to bump it up, it may help you in your PCT.