The two most effective approaches: calorie restriction (a moderate, sustained deficit; it is the real driver of fat loss and the approach with the most accumulated evidence) and the ketogenic diet (very low in carbohydrates; it usually produces faster loss at first, but is harder to maintain). Over the long term, with calories matched, results tend to converge: what matters most is adherence, so choose the one you can sustain.
Prospective study (4,730 women, ~10 years): prolonged fasting periods and weight-loss diets were linked to more hospitalizations for gallstones. Observational: association, causation not proven.
View the study (study) →Diet · Highest evidence: Low-moderate · 1 finding
The two best-supported methods for weight loss are sustained calorie restriction —the calorie deficit is the real driver of fat loss— and the ketogenic diet, which usually produces faster loss at first. Over the long term, with calories matched, results tend to converge: what matters most is being able to maintain the diet over time.
Information, not medical advice. Prescription drugs require a doctor.
Information, not medical advice. Scientific evidence reflects the quality of the studies.