"The second thing that happens is, when you do things like physical activity, you also induce changes in your genes, in your actual genes. It's a new science called epigenetics," she continued. "So what happens is if you actually have genes that-- place you at higher vulnerability for obesity, diabetes, heart disease, cancer. When you do physical activity, you dampen down that. You deactivate a certain percentage of those genes."
Tara Costa is in what Peeke calls "master recovery." Costa recently did something beyond her wildest imaginings -- she finished an ironman triathlon in Kona, Hawaii.
"No dream is impossible," she said. "Every day when I wake up I know that I'm going to be doing something that's going to build a bigger brain, going to run or ride a bike."
Costa said she will be a recovering food addict for the rest of her life, and while it is an uphill battle, just accepting her addiction is a victory.
"I wish I could be normal with it," she said. "I wish I could have one bite and be satisfied and that be it, but you know what, I have hope, I have hope that it will be OK."