Yes, I agree. Only USP grade, JIC.
I have ordered official USP grade BB to rule it out as the culprit for the botched brew. Although, I have doubts that there is any significant difference from what I used.
The BB I used does not have a USP grade but does state 99.9% pure. Of course, companies can state anything about their products, until they get sued. BTW, the photo you provided shows 99.5% pure BB, I don't see a USP grade on it, and I don't believe that a glass container is the measure of quality. However, I assume it works just fine for you.
I'm not saying what I used is gtg. I will only order/use USP grade BA/BB going forward. However, I can't seem to find a labeled USP grade MCT oil. I looked up NOW foods MCT and it does not have a USP grade. The stuff they sell/I purchased on MedLabSupply, (Vale of Eden MCT) states in their description that it is USP grade, but they don't put it on the bottle, which is strange.
Thank you.