There could be some issue with the absorption of essential nutrients or the generation of serotonin. And I feel like having whey liquid could accelerate that process and pick me up from the lows like it had in the past. Casein is too slow and hard to digest. Maybe I'm not reacting to casein. Could be that I'm not getting sufficient absorption of serotonin precursors. Just a theory. Oh and once the gut heals due to the gluten free diet, all of this process might improve a lot. Again, just a theory.