Good info, thanks. I always use 20% BB because many hormones crash in depot. BB is preferably oil soluble so it holds the hormone in solution as the depot leaches into the bloodstream. When people use a lot of BA and no BB, they think the BA hurts. Its really doesnt, its very water soluble and only slightly oil soluble. The result is that it leaches into the bloodstream before the oil and hormone. Now you have crystals in your ass OUCH!