Let me think here.....Maybe because BA does not magically destroy pariculate matter and contaminants, which will still cause discomfort at the injection site, and possibly infection. If you dont feel that is important, then you should go ahead and heed your own advice, but dont spread uneducated advice like this to others.

Interesting, because I tested a Testosterone blend I just made using an NMR machine and the only difference between the oil that I filtered and the oil that I did not, was the concentration of active ingredients. infact there are no contaminants in either mixture. I can see your point if someone is working in an unclean lab enviornment and there are contaminants floating around. but I hope our fellow members know better and are using a clean "lab" to begin with. So I guess my point is, if you are careful enough about the selecting the right sterile products and are working in a clean lab, you do not need to waste your time filtering the oil. Plus you get to have stronger shit.

If you are working in very clean environment then yes you should be Okay in that aspect, but almost all of the powders we use are from china. They may not even be USP grade, and they may have some contaminants. So unless you are absoutly sure that you have clean USP grade powders that have not been exposed to air for an extended period of time, then you should still filter.

Also, you can purge the filters with oil and air at the end so that you make sure you do not lose any active compound.

Also, If you do not filter, you should not use the product for at least a week, as the BA will usually take about that time to kill all of the bacteria or virii present.