The longer your body remains inflamed, the greater your risk of developing these diseases.
So what causes low grade inflammation? Stress is definitely a factor. You should do all you can to reduce or eliminate your stress. Great ways to do this are to exercise, meditate, get plenty of rest, and avoid difficult situations whenever possible.
Diet is another extremely important factor and is the main cause of low grade inflammation. Certain foods will increase the acidity of your blood, making your body work harder. These foods include soda, artificial sweeteners, processed foods, fast foods, meat, and dairy products. If most of your diet consists of these items then you probably have low grade inflammation.
Now I know what you're thinking. How on earth can you cut these food items out? They are the mainstay of the American diet. The good news is you don't have to. Instead, you just need to eat plenty of fresh fruits and vegetables along with these items. Fruits and vegetables are very alkaline and will neutralize the acid in your blood. That is why our government is pushing at least 5 servings a day (and ultimately 9) for good health.
If you're not a fruit and veggie eater you can start out slowly. Have a salad with a meal or make a fresh juice to sip with that cheese and cracker plate. Eventually increase your servings of the healthy stuff. You will find that you get full quicker due to the fiber content of fruits and vegetables. You will also likely lose some weight. Best of all, you will go a long way in preventing disease.