According to research published last year, having a good BMI may not be a reliable way of judging your health. And according to a recent study from continued research, now there's even more data to support the hazards of being thin but still having an unbalanced amount of body fat. People with normal weight obese (NWO) syndrome usually have higher levels of inflammation-causing proteins, which puts them at risk for developing cardiovascular disease or obesity in the future.

The good news is that if you are "fat on the inside" you're still better off than people who are obese in the more traditional sense. People with NWO syndrome don't usually suffer from the expected side-effects of being overweight like high blood pressure, high blood sugar, and high cholesterol.

So next time you're calculating your BMI to figure your health standing, do your body fat percentage as well.