Epigenetics is the system that determines gene regulation in humans.

Epigenetic science is guiding the development of therapies that counter abnormal gene expression. Everyone has genetic mutations, but the presence of mutations doesn't necessarily mean gene dysfunction or disease. Genes code for the production of certain substances, such as proteins or enzymes, and their respective deficit or abundance can result in certain abnormalities. Fortunately, in many cases, it is possible to adjust the results of those mutations by adjusting our environment, lifestyle, nutrition, and adding certain nutrients or natural substances to our diets.

One of the examples of using epigenetics is Dr. Walsh's approach of targeted individualized nutrient therapy treatment, which is aimed at correcting chemical imbalances and altering the levels of key neurotransmitters in the brain.