I had Bloodwork done on My sarms-4 cycle ,everything was fine except my blood /test levels were a tad low ,but due to my age they could have been that way before the test so i concluded that sarms is mildly supressive altho it could be age related.
I have seen COA on sarms search products bro, they are good to go. Very high quality..... But when you are playing with, PH,juice or anything. You have to make your own judgement calls with what you are puting in your body.