aas-things-consider-before-starting-first-cycle-great-read says 21
young-steroids says 25
whats-right-age-tak***********-good-read says min 21, ideal 23-24
(had to delete the URL's as it said i was not allowed yet)
I just need some clarification as i am only 22. I am not planning to atm, but i want to sooner or later. And all these sources have different recommendation and they are all beautifully written so any help would be appreciated

And i have been working out for 6-7 years with a lot of knowledge about diet and nutrition

(med student, 6'2, 176 lbs and 6% bf)
And bonus question is, if and only if its ok for me to use it, is it possible to keep gains IF you are not over genetic limit whatever it is?