Well I’ve used it for 2 months (1 per day after breakfast 500mg). The instructions say 2 per day but since I read some people had troubles sleeping while using Lion’s mane I decided to take half the dose. I felt good overall, it is possible that it had also helped me finish my work project better. When it comes to speech, I still stuttered but had less blocks. I thought it was maybe just a coincidence, that the intake had no effect on my speech but when I stopped using it the blocks were more frequent. I haven’t experienced noticeable side effects but I’ve read that some had trubles sleeping and lower libido.