If you got his doctor's ok on it, you really should get started on it and get those blood sugars down. As far as I know the biggest causes of kidney damage are diabetes (un or poorly controlled) and high blood pressure (uncontrolled).

The doctor I am sure ran a few tests on him to determine the relative health of his kidneys. Since the doctor didn't send him to a kidney specialist, I would have to believe the doctor that they are going to continue to monitor his kidney function as well as other indicators (like cholesterol) to make sure everything is going well. My GP monitors my kidney function each and every visit with a urinalysis.

It's not very often that the doctor says go for it, especially an endocrinologist with Atkins.

Good luck to you both,

wsgts