Until now, scientists believed our gene expression, which has a huge impact on our mental and physical well-being, was set in stone. Now we’re finding out that our gene expression is malleable, influenced by external stressors and lifestyle choices, from running outside to who you have your coffee break with. The way our gene expression interacts with our lifestyle and environment influence is known as the science of epigenetics. Here’s what you need to know about epigenetics and how it can change your future for the better.