I just got a 20ml vial of 1-test cypionate (it's legal). There are no directions on how to take it, although when i researched it I found that one dose lasts up to 16 days. Does this mean I only take it once every 16 days?? Or do I take it daily, and if so, how often?? If anyone has taken this before, or knows what they're talking about, please let me know.