Having run RAD140 for 2 cycles I can defiantly say RAD has minimal sides . Will it supress you - YES it will but not to the degree of AAS unless you got bunk stuff . Its my favourite sarm as I can gain a good amount of mass on it but its more the hardness and fullness in the muscles I get from it that stands apart . YK11 still little known however Dylan did a video on it recently and im considering as running it as part of a 3rd cycle soon . Remember that REAL YK does have a meth ester so some toxicity to the liver is possible . I plan to run as much liver support as possible with it . It sounds good on paper the benefits of YK11 but I cant speak for results as I know no one who has ran a cycle to date .