What type of BB do you use and is there a definite difference?

I ordered some bb on amazon recently but after I did I noticed it said for aromas/fragrance compound. I have seen usp grade, is there a huge difference if im filtering? Has anyone had experience with pinning both? Any insight on thr difference in manufacturing (additives, impurities, etc)
 
That’s a good question....I’ve always just stuck with “usp grade” to be on the safe side, but I’m curious as to what others say....
 
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