We all had this so thankfully it’s not permanent, I don’t remember what cured my low frames per second vision but most of the immediate PFS crash cognitive symptoms are caused by the suddenly ruined digestion and brain chemistry. It’s important to only eat safe foods like celery and steamed carrots and steamed cabbage for a few days in a row when you first get very sick to stabilize your mental health and rule out food allergy factors. Remember to help your body out and chew thoroughly, of course fasting also helps. If you need more calories you can add something like steamed broccoli or steamed potatoes or sorghum!
Keep track of what you eat because if you eat something and you notice strange symptoms like your mental state changing in the next 1-2 hours then you know it’s giving you problems.
When I took probiotics I improved from pfs about 20% within a week, my brainfog was greatly reduced. And a few amino acids like 5htp, Glutathione I improved another 20% within 2-3 weeks, my anxiety was lower and was able to sleep again.
The more you rebuild your digestion the more foods you can eat. Especially stay away from anything artificial like food coloring, sugar substitutes or preservatives. And due to adrenal fatigue stay away from fast food or candy, any stimulants or anything hard to break down.