Mediterranean ketogenic eating matched VLCKD for weight loss over 3 months
Last updated May 27, 2026
Key finding
In adults with obesity, a whole-food Mediterranean ketogenic diet achieved about 15% weight loss in 3 months, similar to a very-low-calorie ketogenic diet, with comparable metabolic improvements and no severe adverse events.
This real-world 3-month study compared two ketogenic strategies in adults with obesity: a meal-replacement very-low-calorie ketogenic diet and a whole-food Mediterranean ketogenic diet. Both groups lost about 15% of body weight and improved waist measures and insulin resistance. The Mediterranean ketogenic approach performed similarly overall and may offer a more flexible option for personalized care.
Quick read
Study at a glance
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EvidenceScore™
Moderate
Study type
non-randomized clinical trial (non-RCT or NRCT)
Follow-up
Short-Term (≤3 mo)
Risk of bias
Some Concerns
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Plain-language summary
What this paper says
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Study focus
In adults with obesity, a whole-food Mediterranean ketogenic diet achieved about 15% weight loss in 3 months, similar to a very-low-calorie ketogenic diet, with comparable metabolic improvements and no severe adverse events.
Published in
Journal Reference
Publication details and source links for this paper.
Masi D, Spizzichini ML, Colonnello E, et al. Personalizing Obesity Treatment: Real-World Comparison of a Very-Low-Calorie Ketogenic Diet Versus a Whole-Food Mediterranean Ketogenic Diet. Metabolites. 2026;16(4):248. doi:10.3390/metabo16040248
Main Effects
↓ Body weight by about 15% in both diet groups
↓ Waist circumference and waist-to-height ratio in both groups
↓ Insulin resistance (HOMA-IR) in both groups; larger drop in MedKD
≈ Similar lipid profile changes between VLCKD and MedKD
Evidence Suggest
- A whole-food Mediterranean ketogenic approach can deliver short-term weight loss similar to VLCKD in clinical practice
- Both ketogenic strategies improved central adiposity and insulin resistance over 3 months
- Preference-based personalized diet selection may be feasible while maintaining substantial metabolic benefit
Who this applies to
Adults with obesity in a supervised clinical nutrition setting
Keep in Mind
Results come from real-world care, not randomized assignment
Between the Lines
- Non-randomized, preference-based allocation introduces selection bias
- Baseline imbalances existed, including higher diabetes prevalence and HOMA-IR in MedKD
- Short 3-month follow-up limits long-term durability conclusions
- No quantitative food intake tracking or standardized adherence score
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