In short, Biome-Friendly means that it will keep your skin microbiome intact, and will not harm Ammonia-Oxidizing Bacteria, or drastically alter your skin microbiome.
We use AOB as our core measurement for testing Biome-Friendliness. AOB are one of the most sensitive microorganisms on our skin. Because of this, we believe that testing against AOB is a great measurement for the overall impact on the skin biome. If an ingredient or product is friendly to AOB, then it will also be friendly to the other delicate microorganisms of the biome as well.
All Biome-Friendly products come with a unique label, which verifies that it’s been tested, but also includes important information about the expiration date and the lot number for the product.