My libido goes up the next morning after my first shot! The gains and vascularity and ridiculous pumps come after ive been running it and DIETING for 4-5 weeks, sometimes even 6 weeks to get that godly feeling... so if your libido isn't up right away I'd be concerned... Also as far as Lewellyns book goes, he is talking about pharmaceutical grade gear when it comes to lots #s and exp dates being printed afterwards