Through friends <a href=" http://bergop.info/cyvita-hoax.pdf#consent ">what does cyvita mean</a> &#8220;Unlike many important medical problems — high blood pressure, cancer, diabetes, heart disease — where we know something about the biology, we know almost nothing about TBI,&#8221; Ganetzky says. &#8220;Why does a blow to the head cause epilepsy? Or how does it lead down the road to neurodegeneration? Nobody has answers to those questions — in part, because it&#8217;s really hard to study in humans.&#8221;