The Study
Effects of a low carbohydrate diet on heart failure symptoms and quality of life in patients with diabetic cardiomyopathy: A randomised controlled trial pilot study.
This study tried to see if eating fewer carbs helps people with a specific heart problem feel better. It gave some people a low-carb diet and others their normal diet, then checked how they felt after 16 weeks. It found that those on low-carb lost weight, but didn't clearly feel better in other ways. So we can say low-carb might help with weight, but we can't say for sure it fixes heart symptoms.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
People with heart trouble and diabetes tried eating fewer carbs for 4 months to see if it helped their heart and how they felt.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 572 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Losing over 10 kg is a big deal for someone with heart failure — it likely helps the heart work easier.
- 2But feeling better or less thirsty didn't improve, so the diet didn't fix the main symptoms.
- 3Those on low-carb lost 10.9 kg on average, while the other group gained 0.4 kg.
- 4Blood pressure dropped a lot in the low-carb group, but not enough to be sure it wasn't by chance.
- 5Feeling better or less thirsty didn't improve significantly.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Nutrition, metabolism, and cardiovascular diseases : NMCD
Year
2023
Authors
Sabine Kleissl-Muir, A. Owen, B. Rasmussen, C. Zinn, A. Driscoll
Related Content
Claims (5)
In patients with diabetic cardiomyopathy, a low-carbohydrate diet was linked to a large average reduction in systolic blood pressure compared to usual care, but the difference was not statistically significant.
Among patients with diabetic cardiomyopathy, a 16-week low-carbohydrate diet did not produce measurable improvements in heart failure symptoms, quality of life, or thirst distress compared to standard care.
After 16 weeks on a low-carbohydrate diet, patients with diabetic cardiomyopathy had a 1.2 mmol/L drop in fasting blood glucose, while those on usual care had a 2.0 mmol/L drop. The difference between the two groups was not statistically significant.
Patients with diabetic cardiomyopathy who ate a low-carbohydrate diet (50–130 grams of carbs per day) for 16 weeks lost an average of 10.9 kilograms, while those who ate as usual gained 0.4 kilograms.
In patients with diabetic cardiomyopathy, a low-carbohydrate diet for 16 weeks did not result in a measurable improvement in heart failure severity as assessed by the NYHA functional class compared to standard care.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.