Intermittent fasting (IF) matches traditional calorie-restricted dieting for weight loss and metabolic improvements like better insulin sensitivity, but may preserve muscle better and suit some lifestyles due to simpler structure. Meta-analyses show similar 3-5% body weight reductions over 3-12 months, with IF edging on waist circumference and fat mass without lean loss.
Weight and Body Composition
IF and traditional diets both cut 1.7-2.5kg more than no intervention, with negligible differences (0.33% body weight). IF reduces fat mass more effectively (WMD=0.74kg) while sparing fat-free mass, unlike some calorie cuts risking muscle. Alternate-day IF yields greater adherence in some trials, leading to 7.6% vs 5% loss at one year.
Metabolic Health
Both improve insulin resistance (HOMA-IR drops), triglycerides, and cholesterol, but IF shows slight edges in blood pressure and lipids vs no diet. No superiority in glucose or long-term risks; benefits like autophagy from IF lack strong human evidence vs dieting.
Comparison Table
IF shines for simplicity in busy routines like India's urban schedules.
Long-Term Considerations
Neither sustains beyond 12 months without habits; IF may boost compliance but lacks diversity in studies (mostly high-income). Consult doctors for personalized use, especially diabetics—both beat inaction but pair best with exercise.
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