Edison Area Health Food
I think there's a health food store in Colonia, it's in the Walgreen's plaza that's across from the supermarket and close to St. John Vianney's. I think they had some health food there.
I will say that Whole Earth center has a great selection. It's a little overpriced in my opinion. but I guess that's because of the selection and being in Princeton.
There are a couple of modest health food stores in Edison. One is at the Inman Grove shopping center at the corner of Inman and Grove Avenues and the other is in the town of Metuchen.
However...if you're a fan of health food stores, you should really make the trip down to the Whole Earth Center in Princeton. It's one of the best in the universe.