Lowering Carbohydrate Intake Helps Type 2 Diabetics' to Keep Blood Sugar Under Control

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Highlights:

• Low carbohydrate diet, with high protein content and slightly increased fat content can reduce sugar blood levels in people with type 2 diabetes
• Cutting down carbs in the diet may also help type 2 diabetics to get rid of liver fat content

Reducing carbohydrates in the diet by increasing the share of protein and fat can help patients with type 2 diabetes to be in control of their blood sugar levels.

Patients with type 2 diabetes improve their ability to regulate blood sugar levels if they eat food with reduced carbohydrate content and an increased share of protein and fat. This is shown by a recent study conducted at Bispebjerg Hospital in collaboration with, among other partners, Aarhus University and the Department of Nutrition, Exercise, and Sports at the University of Copenhagen. The findings are contrary to the conventional dietary recommendations for type 2 diabetics.

‘Reduction of carbohydrates in the diet and increasing the share of protein and fat, can treat both high blood sugar and reduce liver fat content.� ’

Nutritional therapy is important to treat the type 2 diabetes optimally, but the recommendations are unclear. According to the Danish Health Authority, up to 85% of newly diagnosed patients with type 2 diabetes are overweight, and they are typically advised to follow a diet focused on weight loss: containing less calories than they burn, low-fat content and a high content of carbohydrates with a low 'glycaemic index' (which indicates how quickly a food affects blood sugar levels).

Reduced carbohydrate content - increase in protein and fat

A central aspect in the treatment of type 2 diabetes is the patient's ability to regulate their blood sugar levels, and new research now indicates that a diet with a reduced carbohydrate content and an increased share of protein and fat improves the patient's ability to regulate his or her blood sugar levels compared with the conventional dietary recommendations. In addition, it reduces liver fat content and also has a beneficial effect on fat metabolism in type 2 diabetics.

"The purpose of our study was to investigate the effects of the diet without 'interference' from a weight loss. For that reason, the patients were asked to maintain their weight. Our study confirms the assumption that a diet with a reduced carbohydrate content can improve patients' ability to regulate their blood sugar levels - without the patients concurrently losing weight," explains Senior Consultant, DMSc Thure Krarup, MD, from the Department of Endocrinology at Bispebjerg Hospital. He continues: "Our findings are important because we've removed weight loss from the equation. Previous studies have provided contradictory conclusions, and weight loss has complicated interpretations in a number of these studies."

New dietary recommendations for type 2 diabetics in future

Based on the growing body of evidence, we might rethink the dietary recommendations for patients with type 2 diabetes, stresses Thure Krarup:

"The study shows that by reducing the share of carbohydrates in the diet and increasing the share of protein and fat, you can both treat high blood sugar and reduce liver fat content. Further intensive research is needed in order to optimize our dietary recommendations for patients with type 2 diabetes," says Thure Krarup, stressing that the findings should be confirmed in large-scale, long-term controlled trials.

The findings of the study have been published in the article "A carbohydrate-reduced high-protein diet improves HbA1c and liver fat content in stable weight subjects with type 2 diabetes: a randomized controlled trial" in the renowned scientific journal 'Diabetologia.'

Summary: What did the study show?

• A diet with a reduced carbohydrate content, high protein content and moderately increased fat content improves glycaemic control (the ability to regulate blood sugar) by reducing blood sugar after meals and 'long-term blood sugar' (measured by 'HbA1c', which is a blood test used to measure the average blood sugar level over approximately the past two months).
• A diet with reduced carbohydrate content, high protein content, and moderately increased fat content reduce liver fat content.
• A diet with reduced carbohydrate content may be beneficial to patients with type 2 diabetes - even if it does not lead to weight loss.

About the study

The study forms part of CutDM, which - supported by a grant of DKK 4 million from Arla Food for Health - examines whether a diet with reduced carbohydrate content and increased protein and fat content improve type 2 patients' blood sugar regulation. Twenty-eight patients with type 2 diabetes participated in the study over a total period of 12 weeks. For six weeks, the patients were given a conventional diabetes diet with high carbohydrate content, and, for the other six weeks, they were given a diet with reduced carbohydrate content, high protein content and moderately increased fat content. The patients were given the diet types in random order.

Source: Eurekalert

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