Our brains contain one hundred billion nerve cells (neurons). Each neuron makes links with ten thousand other neurons to form an incredible three dimensional grid. This grid therefore contains a thousand trillion connections - that's 1,000,000,000,000,000 (a quadrillion). It's hard to imagine this, so let's visualise each connection as a disc that's 1mm thick. Stack up the quadrillion discs on top of each other and they will reach the sun (which is ninety-three million miles from the earth) and back, three times over.

This exciting new field of epigenetics--meaning literally "around" the gene--allows us to see how environmental factors alter our gene expression in a specific place within each cell. As a result, we now know that when we take active control of these factors, we can literally help control our health and genetic destiny.