ITPP (Myo-inositol trispyrophosphate)

[Kinetix]

This is very interesting and has been used by a handful of pros with and without EPO.

https://racehorsemeds.com/product/new-product-itpp-injection-pre-race-package/

https://www.aecsglobal.com/product/itpp-myo-inositol-trispyrophosphate/

Its a great idea at 1000mg/ml if you can get it in to water at that level.