Structured population data were available for 3 of 3 supporting studies. 3 studies described participants with type 2 diabetes. 3 studies described adult participants.

1 supporting study does not have a displayable topic-matched quantitative effect.

Evidence uses heterogeneous comparison contexts: active_comparator, usual_care.

Available source content was suppressed because validation identified a conflict.

Isocaloric conventional diabetes diet (CD)

Core clinician-reference fields are available or not applicable.

Participants received a carbohydrate-reduced high-protein diet consisting of 30% energy from carbohydrates, 30% from proteins, and 40% from fats.

Carbohydrate-reduced high-protein diet (CRHP)

Participants were randomly assigned in a 1:1 ratio to 6 weeks of a fully provided hypocaloric CD or CRHP diet consisting of 50 and 30% of total energy (E%) from carbohydrates, 17 and 30 E% from proteins, and 33 and 40 E% from fats, respectively.

Participants received an isocaloric conventional diabetes diet consisting of 50% energy from carbohydrates, 17% from proteins, and 33% from fats.

Authoritative quality diagnostic: invalid or missing unit.

Authoritative quality diagnostic: invalid or missing value.

Carbohydrate restriction lowers HbA1c but not β-cell function in T2D

Traditional Diabetic Diet (TDD)

Patients received a daily carbohydrate intake limited to less than 90 g without a restriction of total energy.

Low-Carbohydrate Diet (LCD)

Forty-four older patients with type 2 diabetes and HbA1c ≥ 7.5% were randomly assigned to a 90 g/day LCD or traditional diabetic diet (TDD).

Patients followed a traditional diabetic diet with calorie intake stratified by individual BMI.

Patients were randomly assigned to a 90 g/day LCD or traditional diabetic diet (TDD).

Low-Carbohydrate Diet Improves Glycemic Control in Older Adults

Patients received a daily carbohydrate intake limited to less than 90 g without any restriction to the total energy.

The LCD group consumed 88.0±29.9 g of carbohydrates at the end of the study.

Patients followed a traditional diabetic diet with a target total calorie intake calculated based on ideal weight.

The TDD group consumed 151.1±29.8 g of carbohydrates at the end of the study.

Low-carbohydrate diet × 2-hour plasma glucose

Available supporting studies

Carbohydrate restriction lowers HbA1c but not β-cell function in T2D

Low-Carbohydrate Diet Improves Glycemic Control in Older Adults

Moderate low-carb diet improves diabetes control.