Emerging metabolic research highlights a major paradigm shift in longevity medicine: precision nutrition focused on macronutrient quality and specific amino acid profiles is proving safer and more sustainable than chronic calorie restriction. While decades of laboratory studies have shown that eating less extends lifespan in animal models, severe caloric cuts in humans often trigger muscle loss, hormonal disruption, and weakened immunity. New clinical frameworks demonstrate that tailoring protein ratios, micronutrients, and meal timing to individual metabolic biomarkers activates cellular repair pathways without the side effects of undernutrition.
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