Our diet has changed dramatically over recent generations and the foods we consume today may be processed and potentially low in nutritional quality, whilst farming methods have become more intensive, leading to a depletion of minerals in the soil, making it difficult to consume a nutritiously dense diet. Evidence suggests that the body requires the correct balance of nutrients to support the health of all the systems of the body (skeletal, muscular, nervous, respiratory, cardiovascular, digestive, excretory, endocrine, immune, reproductive and integumentary), and to carry out many physiological processes such as making hormones, enzymes and neurotransmitters. Without the necessary nutrients, the body may struggle to perform these tasks, which over time may increase the risk of developing certain diseases. Diet has been shown to influences the balance between healthy and disease states, and is influenced by an individual’s genetic make-up. Common dietary chemicals can act on the human genome, either directly or indirectly, to alter gene expression or structure.