Good Morfnoevight All you stoners!
The RAW line has the best small volume individual elements I can find. Best source of P for plants- Monoammonium Phosphate 9-61-0 cannot be made without some N, it is the ammonium form of N. For K they have potassium sulfate 0-0-50 of course they have N at 20-0-0. The B-vitamin is 0-0-0 so no nitrogen. 9% magnesium 12% Sulfer 1% B-vitamin. I know of no other place to buy amino acids in small volumes other than the NPK line.
In good soil plants will produce their own B-vitamins (thiamine). I grow hydroponically which may not have all of the microbes needed to assist this process. Extra B-vitamins will not be harmful. The needed magnesium and sulfur are in a guaranteed analysis that I can use for my nutrient calculations and does not contain aromatics.