Prediabetes is most often seen in adults in combination with excess body weight and lack of regular exercise.  It would be helpful for you to determine your body mass index to see if this could be a problem in your case.  This can be determined using your height and weight.  You can go to www.cdc.gov/nccdphp/dnpa/bmi/index.htm to determine your BMI online.  The most important things you can do to decrease your risk for becoming diabetic are to assure that your body weight is desirable and to engage in regular exercise for 30 min. or more most days of the week.  This time can be cumulative and can be something as simple as brisk walking.  I would encourage you to do what you can to prevent getting diabetes.

You could go to www.mypyramid.gov and type in your personal information (in my pyramid plan) to get an idea of how many calories you should be eating each day.  You must decrease your intake by at least 500 calories per day to lose 1 lb per week (from dieting alone).  You can also use this website to determine food choices and see what counts as a serving.  Losing 1-2 pounds per week is considered to be safe and effective.  Even losing 10% of your body weight can result in significant health benefits.

Diverticulosis is usually dealt with by increasing fiber intake in your diet.  Recommended intakes for adults should be 25-35 grams per day and you can see fiber content of foods on the nutrition fact food label.   www.fiberseekers.com might give you some ideas as to ways to increase fiber in your diet.  If diverticulosis progresses to diverticulitis (inflammation/infection), fiber may have to be reduced for a period of time to allow the gut to heal.  But increasing fiber in diet is generally recommended to treat diverticulosis.  Foods containing 3-5 grams fiber per serving are good sources of fiber.