I had asked her vis-a-vis my diabetes and protein in my kidneys - and being unable to take the medication for it - what I should do to keep my kidneys healthy. She replied 'lose weight' and I believed her, because she is a doctor.
Yet the real answer would have been to keep a very tight control on my blood-sugar. If I was obese and not diabetic (type 2) they wouldn't even test my kidneys very often. Type 2 diabetes is very different from type 1. Type 2 is insulin resistance and there is some thought that it could be the resistance which helps to pile on the weight rather than the other way around. Type 1s are short of the cells that make insulin, type 2s just don't use it properly and keep firing more and more into the cells, which grabs glucose and turns it to fat.
I could - if I followed a high carbohydrate, low fat diet especially - lose weight and still have high blood-sugar. I've done it before when I calorie counted and lost weight. I've been carefully monitoring my weight going down and up - and finding dieting a real strain. I've been craving sweet stuff - so I bought sugar free biscuits. I stopped checking my blood. I cut my carbs enough to lose odd bits of weight, but not enough to keep my blood-sugar down to non diabetic levels.
So, sod the weight, if I lose some with going back to diabetic level carbs (under 40g per day) that's a bonus. I will look after my kidneys by trying very hard to reverse my diabetes. It is possible.
Dr. Bernstein is a guy I listen to. He's the longest lived person with type 1 diabetes, he has very few 'diabetic' problems. He keeps his sugar at 'normal' levels (if you're non diabetic then your reading will never go above 100 US/5.6 old UK/38 new UK). So that is what he says to aim for - and I'm going to. It's just hard to take being a diabetic and living with it as the most important thing you have to think of.