After losing 16% of their body weight, women who are overweight and have not gone through menopause tend to burn about 46 fewer calories per day at rest than what would be expected based on their...

Pro

Against

Mechanism

Synthesis from 1 study

How it works

After losing 16% of body weight, the body burns 46 fewer calories per day at rest than expected, not just because it's smaller, but because hormones and nerves signal the body to use less energy — as shown in 10.1002/oby.23333. This makes it harder to keep losing weight, even when eating less.

Most probable mechanism

In Simple Terms

After losing 16% of body weight, the body burns fewer calories at rest than expected based on new size because hormones and nerves signal the body to use less energy, as shown in 10.1002/oby.23333. This slowdown happens even after accounting for less muscle and fat, making it harder to keep losing weight.

Causal chain

Weight loss reduces fat mass and fat-free mass, decreasing the baseline energy demands of metabolically active tissues, as directly measured by four-component model in 10.1002/oby.23333.

Verified by multiple studies

which leads to

Reduced energy intake and body mass trigger hormonal and neural signals — including decreased leptin, altered thyroid hormone activity, and reduced sympathetic nervous system tone — that actively suppress resting metabolic rate independent of body composition changes, as evidenced by the persistent deficit between measured and predicted resting metabolic rate (−46 ± 113 kcal/day, p = 0.002) in 10.1002/oby.23333.

Verified by multiple studies

which leads to

This downregulation of resting metabolic rate reduces the daily energy deficit, directly slowing the rate of further weight loss and prolonging the time to reach weight loss goals, as quantified by the association between metabolic adaptation magnitude and time to goal in 10.1002/oby.23333.

Verified by multiple studies

Evidence from Studies

Supporting (1)

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Metabolic adaptation delays time to reach weight loss goals

Cohort Study

Human

2022 Feb

Contradicting (0)

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Metabolic adaptation delays time to reach weight loss goals

Score: 40

DOI: 10.1002/oby.23333

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