i just did deca 600 every week for 12 weeks alone got 20 lbs and still growin. at 400 i don't see effect but 600 i do. dude above is right about half life, but if you are only doing deca shots hell split em up i just like the results better, and no soreness from shots. if you haven't gotten yet i highly recc QV deca 300. it actually tested at 328/ml this batch. loved it no sides. yea its a vet roid, but they aint makin 300 for the family dog, come on, these people ran ttokyo labs