When I got COVID 6 months back, brain-fog was the only complication I had and it got me really worried as being physically disabled any cognitive impairment wou

When I got COVID 6 months back, brain-fog was the only complication I had and it got me really worried as being physically disabled any cognitive impairment would mean I loose everything. Brain-fog to me was a mix of being dull & delirious. Since oxygen saturation and other vitals were at acceptable limits I was in home quarantine and there was no help(treatment) for brain-fog in specific where I live. Fortunately after two weeks, the signs of normal brain function returned and now I'm confident that my cognitive abilities are back to normal. But since I had COVID, I'm having digestive problems for certain foods(Greens) something which I have been consuming since childhood and abundantly for past several years for health reasons. Now I'm having digestive issues with almost all greens, Some severe(Moringa Oleifera). I heard similar experience about digestive problems to certain food items of a doctor in an Economist podcast about long-COVID.