I had chronic constipation for 3 years. I read about bad gut biome in longcovid people. I ordered a GI Map test (stool sample at home and send back)
My results showed sepsis! Candida and various other bacteria in my gut. Had to take Doxycycline to heal the sepsis and probiotics (similase, berberine and Akkermansia) That regulated my gut and alleviated my constipation!