Would almond milk or almond extract ruin head retention?

[dnr]

I'm looking at making a darker beer with some rich flavors and I like almonds...
Does the nut beverage or extract ruin beer? I'm thinking cashew, almond, etc...
I know people often use PB2 or the like to get peanut butter flavor because the oil is stripped out.
Any ideas or knowledge?

 

[brownni5]

There is fat in almond milk (potentially affecting head retention), but I don't see why almond extract shouldn't work.