YK11 helps with the creation of follistatin which causes a large sudden production of myogenic differentiation factor (MyoD), myogenic factor 5 (Myf5) and myogenin. The three myogenic items are what causes the body to create new muscle cells. Sides seem to be sore joints or muscle aches.
LGD helps to create an anabolic environment in the bones and muscle
both are suppresive and both require a serm. both can be used as a bulker, imo YK would be better for bulking and as far as doses, only whats on the bottle, otherwise its broscience. 10 mg a day but some have done a split 5 at different times