Never heard that one before, and honestly it doesn't make much sense.

I've had my script filled with pharmacutical (Cytex, Canada) Test cypionate in EO, mind you it's only 100mg/ml, but it has all the same properties, active and half lives as any other test cypionate.

I'm beginning to think this is a home brewers myth...I'll try to get some answers out of the people who are claiming this on another board.

...ok update on this. Aparently, there is a study on carrier absorption rates that shows EO has a noticeable slower rate compared to other carriers. I'm searching around trying to find it so we can look it over.

The delay caused by the esters supposedly has to do with the ratio of oil to water solubility or some shit like that.

It makes sense to me that a different solubility of the depot would affect absorption, but in practice, I haven't heard anyone make such a claim.

Last clarification: I miss-read a previous post on this matter and aparently there is no study, just a bunch of conjecture. Bottom line is, I don't think this will impact our use of EO to any degree in homebrewing.