https://www.mountsinai.org/health-library/supplement/vitamin-b12-cobalamin
Funny it mentions it might be a contributor to heart disease.

Has anybody cross referenced any of the dates to his past performances and registered works?

I wish they would make this public for every horse, I would want to know who is racing on Finish First, sounds like an epo mimic kind of substance. Surprised they allow this, it states plainly that it is the latest in human medicine and pretty blunt in its effects!

https://finishfirstequine.com/collections/supplements/products/new-blood-builder