Key points from article :
Unhealthy food seems to make the body's defences more aggressive in the long term.
Mice consumed a "Western diet": high in fat, sugar and low in fibre.
Increased immune cells such as granulocytes and monocytes in blood by activating genes.
Caused normally hidden pieces of DNA to unwind.
Accelerated the development of vascular diseases and type 2 diabetes.
Study by University of Bonn, published in the journal Cell.