The Claim
A 1-month very-low-calorie ketogenic diet (700-800 kcal/day, 11% carbohydrates, 46% fat, 43% protein) in 17 women with obesity (mean BMI 37.5 kg/m²) is associated with a 7% reduction in body weight, an 8.8% loss in fat mass, and a 5.6% loss in lean soft tissue.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In 17 women with obesity, a one-month very-low-calorie ketogenic diet resulted in a 7% drop in total body weight, with 8.8% of that loss coming from fat mass and 5.6% from lean soft tissue.
See the scientific wording
A 1-month very-low-calorie ketogenic diet (700-800 kcal/day, 11% carbohydrates, 46% fat, 43% protein) in 17 women with obesity (mean BMI 37.5 kg/m²) is associated with a 7% reduction in body weight, driven by an 8.8% loss in fat mass and a 5.6% loss in lean soft tissue, indicating that substantial weight loss occurs alongside significant muscle tissue reduction.
When the body gets almost no carbs and very few calories, it runs out of stored sugar and starts breaking down muscle to make glucose for essential functions. At the same time, the thyroid hormone that controls how fast the body burns energy drops, slowing down metabolism. This combination causes the body to lose muscle along with fat, even though it's burning fat for fuel.
What the research says
1 studyThe study found that when women with obesity followed this strict low-calorie keto diet for a month, they lost 7% of their body weight — and about 40% of that loss came from muscle, not just fat. This matches exactly what the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.