Based on the available information, it appears that "Biome" is a legitimate entity. It's important to note that there are multiple entities with the name "Biome". For instance, Bioma.Health has received positive reviews on Trustpilot. Another entity, LeanBiome, is a weight reduction product that claims to help users lose weight healthily. However, as with any product or service, it's always a good idea to conduct thorough research and consult with a trusted professional before making a decision.