Well, plain old unmodified 1-test has decent oral bioavailability for a steroid hormone so it could be use orally. It would just be cheaper to take the base powder if doing it orally, or preferably transdermally, since the cypionate ester wouldn't have any signifigant effect orally. The reason an undecanoate ester product dissolved in oil works to improve oral bioavailabilty is because it makes it ultra soluble in oil for lymphatic delivery, of which I'm not a big fan. The cypionate ester wouldn't increase the solubility to the degree necessary to improve oral bioavailability signifigantly.