Research
Mixed
The renal safety of long-term low-carbohydrate diets in obese individuals remains undetermined due to insufficient reporting of renal function data in clinical trials.
Do not start a low-carb diet if you have existing kidney disease. For healthy obese individuals, current data does not show harm, but long-term safety is not proven because most studies don't track kidney function. Monitor your health with a doctor.
LimitedQualifiesLOW confidence
Because only four trials reported data on renal function and psychological variables, renal safety and impact on well-being could not be assessed.
Why this rating
Low quality evidence due to lack of data (GRADE: low for renal function).
Source
Effectiveness of low‐carbohydrate diets for long‐term weight loss in obese individuals: A meta‐analysis of randomized controlled trials
Giovanni Antonio Silverii et al. · Diabetes Obesity and Metabolism · 2022
DOI 10.1111/dom.14709
Meta-analysis · 25 studiesCited 36×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Low-carbohydrate diets produce significantly greater short-term weight loss (3-8 months) in obese individuals compared to non-carbohydrate-restricted diets, but this advantage disappears in the long term (10-30 months).Good
- Low-carbohydrate diets improve long-term cardiovascular risk factors (specifically triglycerides and HDL cholesterol) compared to balanced diets, despite no long-term difference in weight loss.Moderate
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
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