Overview
A recent review examining decades of research in humans and animals suggests that the long-standing fear regarding 'yo-yo dieting' causing permanent metabolic damage may be overstated. The analysis found a lack of convincing evidence to support the claim that losing and regaining weight leads to persistent detrimental effects on metabolism.
Research Context
The concept of 'yo-yo dieting,' characterized by cycles of weight loss followed by weight regain, has often been associated with the notion of metabolic disruption and long-term harm. This review specifically addresses the prevailing belief that such weight cycling negatively impacts metabolism in a lasting way.
Approach
The researchers conducted a major review that involved analyzing studies conducted over decades. This analysis encompassed research performed on both human subjects and animal models. The objective was to evaluate the existing evidence concerning the metabolic and physiological impacts of weight loss and subsequent weight regain.
Findings
- The review identified little convincing evidence to support the idea that losing weight and then regaining it causes long-term harm.
- While regaining weight can negate some health improvements achieved during the initial weight loss phase, it does not appear to render individuals worse off than their state before the weight loss attempt.