The milk won't slow absorbtion too much. At least, I don't think so. If it slows at all, it's going to be pretty insignificant, that it won't matter.
I like my milk, I'm keeping it. I hate when people focus on the small details. Don't worry about it man. I understand if you're curious, but because you hear milk slows the absorbtion, well... don't take that to heart.
By the way, I used to have tuna with flax before bad. That should slow the absorbtion nicely.