Prebiotics in simple terms, can be classed as a food source that encourages the growth of good bacteria on the skin. The microbiome (the ecosystem of bacteria on the skin) is a relatively new discovery and we are learning that this is linked to many different aspects of our health, mood and appearance. A diverse breadth in the strains of bacteria living on the skin results in a healthy microbiome, and some early research has linked certain imbalances in this microbiome to skin conditions such as acne, ezcema and psoriasis.