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Low carb diets have been shown to be effective in diabetic control. The reduction in carbohydrates would result in reduced blood glucose
and reduced stimulation of insulin
Since insulin, in addition to reducing blood sugar, also inhibits fat breakdown and promotes fat storage, reduced insulin would result in loss of fat which would also be beneficial in diabetic control.
Remember if you reduce your carbs you may also have to eventually adjust your diabetic medication.
I hope this helps