It has an anticatabolic effect (clen and T3 are the worst in this case). Furthermore, GW-501516 improves the lipid values (HDL/LDL values, which will be more important, wenn you are getting older). Ephedrine has absolutely no anabolic effects, it doesn't improve any anabolic process.
GW-501516 gives you a clean source of energy, the power is not the same like from stimulants. I've used GW from RS (the old charge, which worked very well). But now I don't know how good the new charge is, because all of their products (except MK-677), have a new dosage.
Since then, the new products werde underdosed as shxt (the LGD-4033, had no effects, sadly).
Since I used this substance once, I won't miss it in my future cycles.
I could imagine, that GW and a ECY-Stack with a nice calories deficit will be probably the best cutting stack (performance/side effect ratio). And you won't use any AAS or SARM as muscle protector.