...depression, skin conditions, Ulcerative Colitis, Chron's Disease, immune system boost, digestion & nutrient absorption, cholesterol levels, bowel health, yeast infections. Your gut bacteria affect your digestion, nervous system & brain, your digestion & absorption of nutrients, modulation of brain chemicals, your immune system. You have more microorganisms living in your gut than you do cells in your body. These microorganisms affect just about every system in your body, starting at the cellular & tissue levels; some even create vitamins. That bacteria in your gut can affect your brain function is, by itself, a big deal. That it can help regulate cholesterol levels & help prevent heart attacks is also not a small thing. That bacteria in your gut can alleviate anxiety disorders is another major consideration. A lot of promising research & results in many interesting fields. So maybe do yourself a favor & eat some yogurt, take a probiotic. Prebiotic foods like garlic, onion, fermented foods like pickles, sauerkraut are great to feed the probiotic organisms. A simple google search will produce thousands of articles.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5031164/
https://my.clevelandclinic.org/health/articles/14598-probiotics