Okay so people say to PCT like 3-4 weeks after your last shot of deca. Cool.

Here's what I don't understand: Say hypothetically, you shot 2g's deca in one shot. Using the half life of 15 days and some simple math, you should still have like 100mg in you at the end of 64 days. This is over 9 weeks. If you were shooting 2g's a week, my calcs say that you should wait like 12-13 weeks to PCT (under 100mg in your system)

^^ Why is this incorrect?