Expressvetproducts. They also have some freaky injectibles like pure AMP-5 and pure ATP. On the other hand, I just can't see how some of the pastes could even work. Rich horse racers must fall for it.
Also, check out Enerselen. It's basically like kynoselen except it has twice the B12, twice the selenium, ATP instead of AMP (is this good or bad?), and it has uridine triphosphate (not sure what this does). I have no clue which is better, but I'm doing my homework on it.
Kynoselen
Each 100 mL contains disodic adenosine monophosphate 0.2 g, heptaminol hydrochloride 0.5 g, sodium selenite 0.05 g, potassium aspartate 1 g, magnesium aspartate 1.5 g and cyanocobalamin 0.025 g.
Enerselen
Each mL contains adenosine triphosphate 2 mg, uridine triphosphate 1 mg, sodium selenite 1 mg, heptaminol hydrochloride 5 mg, magnesium aspartate 15 mg, potassium aspartate 15 mg, cyanocobalamin 500 microgram.