Here's an example of a YC startup that's exploring this area: https://persephonebiome.com/ https://persephonebiome.com/. They are developing microbiome therapeu

Here's an example of a YC startup that's exploring this area: https://persephonebiome.com/ https://persephonebiome.com/. They are developing microbiome therapeutics that improve the effectiveness of certain classes of cancer drugs. (We're a small investor.)