those dudes are right but i took 200 for like 3 weeks and did not see to many gains in the gym so i went to 400 and really took off. it was better for me i think to take 400 since i was not taking anything else with it, just on a good diet. no side's so dont worry about that shit. the only side is quality gains in muscle. i guess i am saying try the 200 and if that is not enough for u take more and shorten the cycle. good luck dog.