Reducing refined carbs, and adding fiber, nuts, and fish can lead to a drop of around 0.3 to 1.0% in HbA1c levels, as per Doctor Sudhir.
Both low-carbohydrate diets and the Mediterranean diet have strong clinical evidence. These dietary approaches share core features: controlled carbohydrate intake, higher fibre, healthy fats, and reduced refined carbs.
A study titled โthe effects of low-carbohydrate diet on glucose and lipid metabolism in overweight or obese patients with T2DMโ found that in overweight/obese T2DM patients, low-carb diets significantly improved HbA1c: mean difference of around 0.36% vs control.