great post. sugar negatively affects your gene expression, promotes the wrong type of bacteria populations in your gut, speeds aging, and increases chances of cognitive and neurological disorders. In fact, dementia is now being called type 3 diabetes. I have an article I've posted on how bad sugar is.

For more resources, here's a post on my blog regarding Sugar and how it effects Genetics
http://www.forever29nutrition.com/ignite-sweet-16-gene/