I brought this up a while back when the original prohormone 4-AD was used orally with good results in high enough doses. Because it is a patent application I won't copy and paste from the page but here is the link. Summarized for those the hate reading long stuff, basically it says micronized testosterone base in a fat (solid or liquid) can not only be absorbed in to the blood and reach targets in the body but also it can sustain it's release for up to 12 hours. Actually how much that gets absorbed isn't stated but it looks promising.

http://www.freshpatents.com/Method-o...0080305177.php