I'm on my 4th week of my cycle which consisted of prop, cyp and dbol. I experienced the usual soreness associated with prop while using the first vial but nothing during my second one. The second vial was from a different shipment but also zline. I know the soreness is usually reduced after the muscle gets used to it overtime but to be completely gone. I have no doubt the gear is g2g just trying to figure it out. Not sure but I would assume the 2 vials were from different batches. Is this due to the crystalline process I read about.