I probably should have returned it but that's normally a hassle. I origionally had three bottles, two of the bottles (still unopened) were sent instead of S4 (backordered). At the time I thought it was a good deal. I want to try S4 but have reservations due to changes in the M1 receptors in the body. I will try to reuturn the unopened bottles of LGD. Ostarine works well for me may they will exchage.