Does Diet Matter Here?
Reviewed by CDE Mehandi Sharma · Updated
The honest answer is that it depends on your subtype, and this is the category where generic diabetic-diet advice does the most harm.
In GCK-MODY, diet has limited effect on your glucose, for the same reason medication does. Your body regulates glucose accurately around a higher set point, and food choices do not move that set point much. People with GCK-MODY frequently arrive having spent years on a restricted diet, having been told their numbers were their fault.
That does not mean eat anything. It means ordinary healthy eating for general health, rather than a diabetic diet aimed at glucose you cannot change.
In HNF1A and HNF4A-MODY, diet matters considerably more. These subtypes are characterised by a large rise in glucose after meals, so what and how much you eat at a sitting has a direct and visible effect. Portion and pairing genuinely help here.
On a sulfonylurea, meal regularity becomes important for a different reason — skipping meals can cause lows.
So the useful question for your appointment is specific: given my gene and my treatment, what should I actually change about how I eat?
Asking it saves some people years of unnecessary restriction, and gives others a lever they did not know they had.