There is no "one size fits all" when it comes to the microbiome. You could be a vegetarian who eats all those grains and legumes that the Paleo people demonize -- and be extremely healthy. The key is to keep supporting your little friends i.
Kids in Baltimore, MD use "yo" as a gender-neutral pronoun. Click through to read the NPR article. Their intention does not seem to be to correct sexist language, but that is the end result nonetheless.