Low glycemic diet shows meaningful improvements for people with diabetes. Low glycemic diet can also lower other risk factors such as fasting glucose, LDL cholesterol, body weight, and C-reactive protein, but not blood insulin levels, HDL cholesterol, waist circumference, or blood pressure.
- Low-GI foods show meaningful reductions in blood sugar levels (HbA1c) compared with higher-GI/GL control diets
- Vegetables, most fruits, pulses and wholegrains are some of the low-GI foods
- Consuming a low glycemic diet can also reduce the risk of heart disease in diabetics
A low GI or GL (glycemic load) diet is therefore recommended for people with diabetes by clinical guidelines across the world. However, the last European Association for the Study of Diabetes (EASD) guidelines were published over 15 years ago and several trials have been published since then.
So researchers set out to summaries the effect of low GI/GL dietary patterns on blood sugar control and other known risk factors in diabetes to help inform the update of the EASD guidelines for nutrition treatment.
Their results are based on 27 randomized controlled trials published up to May 2021 investigating the effect of diets with low GI/GL in diabetes for three or more weeks.
The trials involved a total of 1,617 participants with type 1 or 2 diabetes, who were predominantly middle aged, overweight or obese with moderately controlled type 2 diabetes treated with drugs or insulin.
The results show that low-GI/GL dietary patterns were associated with small but clinically meaningful reductions in blood sugar levels (HbA1c) compared with higher-GI/GL control diets.
The certainty of evidence was high for reduction in blood sugar levels and moderate for most other outcomes, suggesting the available evidence provides a good indication of the likely benefit in this population.
The researchers point to some limitations that may have affected their results, such as imprecision in the evidence for the effect of low GI/GL dietary patterns on LDL cholesterol and waist circumference, and the small number of available trial comparisons for blood pressure and inflammatory markers.
However, they say their findings show that low GI/GL dietary patterns “are considered an acceptable and safe dietary strategy that can produce small meaningful reductions in the primary target for glycemic control in diabetes, HbA1c, fasting glucose, and other established cardiometabolic risk factors.”
“Our synthesis supports existing recommendations for the use of low GI/GL dietary patterns in the management of diabetes,” they conclude.
Source-Eurekalert