As someone who has done a ton of LSD and shrooms for depression and anxiety, I found that the first few days after I take them, my stuttering gets much much worse and have to work on my fluency until I get back to my baseline. Reading the comments, I see many people saying that it either helped their stutter or had no effect on it. I guess it’s an individual response. So, you can’t know the answer until you try it. But remember to always use them responsibly and in a safe environment. Start small and have a trip sitter if you feel that it may help. I personally prefer to trip alone though.