How long? Depending on the ai type, dosage, bodyfat and more.
Can't say for sure, but for me on 500mg of test e, levels came back after 10 days.
It's just logical if you calculate the time it takes to get out of your system.
If you change something you might end up causing e2 levels to go back way too high.
Which ai did u use? My exp was with adex..