That's exactly what happened to me. I was always slender and fit, and I ate what I thought was a healthy low-fat diet. Unfortunately for me, I love veggies and salad but I also love the starchy foods like bread and pasta and I had NO idea that my middle-age weight gain was due to eating too many carbs until it was too late. I now have Type 2, which is kept in check by eating low carb but it's hard as crap to eat this way 24/7 because my body hasn't lost the cravings. Also, low carb food isn't easily available especially when traveling.

If I had only known twenty years ago that moderating my carbs and adding some fat would have avoided this permanent damage to my metabolism. As a tragic aside, my poor mother died of a heart attack at age 59 because of undiagnosed Type 2. She kept eating lower and lower and lower fat, and continued to gain weight and have terrible cholesterol numbers. Doctors were stumped---why did she have high cholesterol and high blood pressure when she didn't eat fat or excess salt? Now we know that had absolutely nothing to do with it.