Are you talking about cooked greens or raw greens? I believe the general consensus is that cooked greens are easier to digest then raw. I recently had a stint with my digestion where even the cooked greens were giving me trouble and needed to back off on them temporarily and take HCL to get my gastric juices flowing. I thought "what kind of hell is this that I can't eat broccoli? Nnnnooooo!". I stuck with the easiest to digest veggies (summer squashes, sweet potatoes, beet greens, carrots, radish, zucchini, etc.) for a couple weeks and slowly added the greens back in. I still am not eating, say, raw kale avocado salad, but kale chips and boiled greens are all good now. HTH.