@ful - No one is debating that weight and overall health don't have inter-related factors. The debate is causation versus correlation and, in fact, evidence shows that diabetes is a genetic condition often *triggered* by weight, but more often *triggered* by diet, even weight control diets.
And as far as weight loss programs go. Many, many people have glandular issues (like my hypothyroidism) that damn near make losing weight impossible. For me, 245-255 seems to be where my body hovers. When I went to Canada I hardly ate. Almost no fats and carbs/sugars were virtually none. I was eating some scrambled eggs and a piece of sausage with a whole wheat english muffin for breakfast. A grilled chicken and spinach salad (or equivalent) for lunch. And skipping dinner altogether. In one weeks time, I managed to lose 6 pounds. Same regimen the second week, but no weight loss. I tried for three more weeks after the trip eating very similar and still no additional weightloss.
I know I am anecdotal evidence, but I'm not unique. Hypothyroidism is a major factor in weight gain. And many "overwieght" diabetics suffer from it because it wasn't even tested regularly for many years. People just said "oh he's a fat slob" (doctor's included) instead of looking at the cause of the weight gain. It took going to an endocrinologist to discover my real problem and I promptly fired my doctor for never mentioning this to me as something to have looked at. In fact, it was my attempts to *lose* weight that triggered my diabetes. I was doing the citrus (especially grapefruit) diet and the excessive carbs triggered my diabetes. Notice, I said triggered, not caused. Diabetics are born with the gene. This is undeniable. Whether it is triggered or not is the question. I can almost guarantee that Halle Barry's was triggered by some kind of carb-based diet to maintain her awesome figure.
Not enough is known about the genetics of diabetes at this point to help wanr people who are at risk before they start showing signs, and fad diets like the grapefruit diet are actually horrid for diabetics.
Even Adkins is crap. If you look at how that system counts carbs, it isn't realistic. Realistically, one should only deduct half of the carbs in fiber or sugar alcohols as some of these still get converted to glucose inthe end. And one needs to look at the Glycemic Index and Glycemic Load of foods to truly decide what is and isn't safe to eat. For instance white bread is bad, whole wheat is OK, whole multi grain is good.