Caffeine and PEing....

I read somewhere that ingesting caffeine (ie. coffee, Pepsi, Mountain Dew, etc) will slow down if not prevent gains. Has anyone else heard/ read this?

Can I still drink my two cups of coffee in the morning and expect to see results?

All comments are appreciated.

Caffeine and other stimulates decrease blood flow to the genitals. Yes it will slow gains but you can still gain.