If you are taking it to gain, take 5-8mg for 8 weeks. Along with don't forget to lift heavy weights, what is the side effects of sarms. If you want to lose fat then take 3-5mg for 8 weeks. Make sure to maintain a proper diet and do exercise to your SARMs use. GW-501516 has 16-24 hours half-life.You can naver be 100% confident of the purity or that you are even getting the one you actually wanted, what is the side effects of sarms.