I've read numerous articles over the years about how good and bad bacteria affects your health. 

https://getpocket.com/explore/item/gut-bacteria-change-as-you-get-older-and-may-accelerate-aging?utm_source=pocket-newtab-en-us

It is not crystal clear how changes to the microbiome might drive aging, or if they really do. Research in rodents has shown that disruptions to gut bacteria can make it harder for intestinal stem cells to regenerate. This could affect metabolism as well as the overall health of the intestinal barrier; problems with that barrier have been tied to aging and age-related conditions such as liver disease, metabolic diseases, inflammatory bowel diseases, and lung and brain problems. The microbial changes that occur later in life may also create a more inflammatory environment in the gut, helping to drive the aging process. When researchers transplanted gut microbes from older mice into younger germ-free mice in a 2017 study, the young mice developed inflammation that is indicative of aging.

I'm going to dive into this information because inflammation is a big deal coming from different conditions and diseases.  If we can change our gut biome and decelerate aging, then this is worth some more personal research.