It was once assumed that environmental factors took generations to affect a gene change, but research is now finding that a bad enough toxin or environmental stress can alter genes in a single generation. While genes can pre-dispose us to disease, the disease will only present itself in the presence of factors like toxins, poor diet or stress. A predisposition to diabetes, for instance, might be activated from toxins in foods, pesticides, herbicides, chemicals, or from a poor diet, especially when any of the above factors are also present.

To help you avoid or limit fast food, Chong recommends planning ahead by packing healthy meals or snacks. Diabetes-friendly snack ideas include a piece of fruit, a handful of nuts, and yogurt. Also, if you absolutely must stop at a fast-food restaurant, steer clear of anything that’s deep-fried — such as french fries, chicken nuggets, and breaded fish or chicken, Chong says.
Normally, blood glucose levels are tightly controlled by insulin, a hormone produced by the pancreas. Insulin lowers the blood glucose level. When the blood glucose elevates (for example, after eating food), insulin is released from the pancreas. This release of insulin promotes the uptake of glucose into body cells. In patients with diabetes, the absence of insufficient production of or lack of response to insulin causes hyperglycemia. Diabetes is a chronic medical condition, meaning that although it can be controlled, it lasts a lifetime.