Now it appears that our diets and lifestyles can change the expression of our genes. How? By influencing a network of chemical switches within our cells collectively known as the epigenome. - NOVA’s Ghost in Your Genes, PBS Did you know that genes control everything in our bodies, including our health? Dr. Tracy Gapin explains that for decades the science and medical community assumed that genes predetermine our health, disease, aging, longevity, and even our natural lifespan. …