I tried an at-home gut microbiome test kit made by Silicon Valley startup uBiome. Since being founded in 2012, uBiome has raised nearly $110 million and rocketed from a meek citizen science project to a key player on the life science venture scene. Having experienced minor digestive issues for years, I hoped to learn more about the gut bacteria thought to play a role in everything from our mental health to our ability to process fat and gluten. What I learned about my so-called "forgotten organ" truly shocked me.