I have used Yk11 before on my pet rat and he put on 8 pounds and had no side effects. His cycle was 45 day on with a month off. Then he took LGD4033 for 45 day with no side effects and put another 8 pounds on, then he rested for another month and then repeat the cycle. I got all my sarms from Sarmsstore and I have been very pleased with the prodcts. Would recommend.