The systems and methods of the disclosure provide inter alia cosmetic products e.g. finished cosmetic products that may be considered to be biome friendly or biome compatible. The systems and methods of the disclosure may provide for use of cosmetic products e.g . finished cosmetic products that may be used in combination with bacteria e.g. non pathogenic bacteria e.g. ammonia oxidizing bacteria which may be used in the form of a preparation or composition to be applied to a subject.