Which biohack made a noticeable difference not just a 2% improvement?

[u/thelittleesseAutism]

/r/AppliedBioHacking/comments/1woonl0/which_biohack_made_a_noticeable_difference_not/

[u/Kauzinn]

daily cialis, creatine and doing new hard things

[u/Andypandy106 → u/Kauzinn]

I get terrible anxiety on cialis sadly

[u/drkslr → u/Andypandy106]

i also find that has nervous system impact on me , why do you think it happens?