I've just saw this now and I've ran sarms twice, both s4 and osta stacked; I did notice a bit of shedding but I do have long hair and didn't think anything of it. Normally we could shed quite a bit throughout the day and not notice it, I mean there could be several factors here as well, such as age/genetics, etc. There are some properties in each sarm that could have somewhat of an effect, esp a triple stack, but as jessep asked if you've taken ph's before if you noticed shedding then there's your answer right there and look into certain supps to prevent more hair loss and make sure that it's not a mental thing or that it's a buildup, are you still running this or no?