Assertion

Rapid weight loss can lead to weight regain and a decrease in metabolism.

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Explained

The text explains that rapid weight loss can lead to weight regain and a decrease in metabolism. This is because rapid weight loss methods, such as crash diets, can lead to a loss of muscle mass and a decrease in metabolism, making it harder to maintain weight loss over time.

Context for Assertion

The context of this assertion is the discussion of weight loss and metabolism, and how rapid weight loss can have negative effects on the body.

Concepts for Assertion

Tags

weight loss
rapid weight loss
weight regain

Evidence for Assertion

Why relevant:
Why true:The study found that rapid weight loss can lead to a decrease in metabolism and weight regain, supporting the assertion.
How it is true:The study provides primary evidence of the negative effects of rapid weight loss on metabolism and weight regain, supporting the assertion.
ELI5
  • The study tested the effect of rapid weight loss on metabolism and weight regain.
  • The participants who underwent rapid weight loss experienced a decrease in metabolism and weight regain.
  • This suggests that rapid weight loss can lead to weight regain and a decrease in metabolism, supporting the assertion.
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Metabolic adaptation persists over time and is likely a proportional, but incomplete, response to contemporaneous efforts to reduce body weight
Study Type:Human Study
DOI:N/a
Experimental Study
Human
n=14
p≤0.05
The Obesity Society
Publication 01/01/2016
Why relevant:
Why true:The study examines how rapid weight loss can cause metabolic changes that may contribute to weight regain.
How it is true:The paper presents primary research on the physiological mechanisms contributing to weight regain after dieting, asserting a clear connection to metabolism.
ELI5
  • The study looked at people who lost weight quickly and how their bodies reacted.
  • It found that quick weight loss caused changes in metabolism that made it easier to gain weight back.
  • This shows that rapid weight loss can lead to gaining weight again faster.
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The Defence of Body Weight: A Physiological Basis for Weight Regain After Weight Loss
Study Type:Human Study
DOI:N/a
Review Article
Human
International Journal of Obesity
Publication 28/08/2012
Why relevant:
Why true:
How it is true:
ELI5
  • The researchers divided participants into two groups: one lost weight quickly and the other more slowly.
  • Both groups lost a similar amount of weight overall.
  • When they regained weight, it was approximately the same for both groups.
  • This shows that how fast you lose weight doesn't necessarily mean you'll gain it back faster.
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The effect of rate of weight loss on long-term weight regain in adults with overweight and obesity
Study Type:Human Study
DOI:N/a
Randomized Controlled Trial
Human
n=57
p≤0.05
Obesity
Publication 27/01/2016
Why relevant:
Why true:The paper discusses how metabolic adaptations—changes in hormones like leptin and ghrelin—occur after rapid weight loss and affect weight regain.
How it is true:This is a primary study that provides evidence for hormonal changes affecting metabolism and weight regain.
ELI5
  • Researchers measured hormones in people who lost weight quickly.
  • They found changes in these hormones that made people more likely to gain weight back.
  • This evidence supports the idea that rapid weight loss can make it easier to gain weight again.
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Weight Regain after a Diet-Induced Loss Is Predicted by Higher Baseline Leptin and Lower Ghrelin Plasma Levels
Study Type:Human Study
DOI:N/a
Experimental Study
Human
n=104
p≤0.05
The Journal of Clinical Endocrinology & Metabolism
Publication 01/11/2010

Assertion from content

The Smartest Way to Lose Belly Fat and Never, Ever Gain it Back
“if you drop your metabolism down too fast you will gain weight back faster and more aggressively than you did before”