Anyway, my advice for your husband is to just tell him to stop eating foods that make him feel bloated, uncomfortable, tired, etc; Those are signs of inflammation in the gut, which is leading to serotonin build-up.
Also, make him a carrot salad, and eat it yourself, too! Carrots are cheap.
grated carrots, coconut oil, vinegar, and salt. Eat it daily, you'll probably notice various improvements quickly.
Time is passing so quickly. Right now, I feel like complaining to Einstein. Whether time is slow or fast depends on perception. Relativity theory is so romantic. And so sad.