Very simple explanation to that
At high doses test overpowers with aromitization and higher primo can be run without dropping E2 too low
But we are not talking super high doses here
It’s different with 300 test and 600 Primo
Next, it’s not a theory that primo can crash E2, it is proven with blood work by many, myself included
Running 500 test and 300 nandrolone with no AI at all and 475 Primo my E2 has been 19 and 17 on two different test with those exact doses
At 350 test with no Primo I require an AI
The details matter and they make a difference
A little research and all this can be understood