id say its necessary if you want some boobs, a gram of test is kinda silly. your body likes to keep a nice homeostasis/equilibruim, it notices soo much test and begins to convert the test to estrogen because it is supposed to have a certain test/estrogen balance...so lets say you normally have 100mg test a week from your testes and the ratio of test to estrogen is 100/10, hypothetically, so now your taking 1000mg test and your body compensates by converting 100mg of that 1000mg to estrogen, its pretty simple, your body doesn't like change and its trying to even things out, or that could just be my .02$