Plastic surgeons often have to explain to patients the pre-disposition of their body to hold weight and other characteristics, are genetic. Can your DNA be altered? Yes it can. Your life story depends upon a combination of the DNA you’re stuck with plus your environment, including all the little choices and events that happen over that lifetime. But in recent years, researchers have discovered that, while DNA lays out the options, many of those life experiences — the foods you eat, the stresses you endure, the toxins you’re exposed to — physically affect the DNA and tell it more precisely what to do. The cause: a kind of secondary code carried along with the DNA. Called the “epigenome,” this code is a set of chemical marks, attached to genes, that act like DNA referees. They turn off some genes and let others do their thing. And although the epigenome is pretty stable, it can change — meaning lifestyle choices such as diet and drug use could have lasting effects on how the body works.