I had the exact same thing, my knees looked almost identical before I went low-carb and the Primal. I've found that if I start slacking off and over-doing the sugar it starts coming back so it's a really good motivator to keep on track.
Originally Posted by Hezzielee
Acanthosis nigricans is what it's called (AN). It's to do with insulin resistance.... are we surprised??
Acanthosis nigricans. DermNet NZ
I have this problem too, and it is definitely improving with primal eating, although it is not gone yet.
There are so many small issues like this people have that they don't even realise are due to their diets.