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Claim
Strong Support
descriptive
Analysis v4

In non-obese adults, reducing calorie intake for two years does not change biological age as measured by PhenoAge or GrimAge DNA methylation clocks.

65
Pro
0
Against

Mechanism

Synthesis from 1 study

How it works

Eating fewer calories changes specific chemical marks on DNA that track how fast the body ages, but only for some of those markers. Other aging markers stay the same because they measure different biological processes that aren't affected by reduced calorie intake.

Most probable mechanism

In Simple Terms

Eating fewer calories changes how chemical tags attach to DNA in specific locations linked to aging. These changes affect some aging clocks but not others, because each clock tracks different sets of DNA marks tied to distinct biological processes.

Causal chain
1

Reduced energy intake alters activity of nutrient-sensing pathways including mTOR, AMPK, and sirtuins, which regulate cellular metabolism and stress responses

Supported by evidence
which leads to
2

Altered nutrient-sensing signaling modifies the activity of DNA methyltransferases and demethylases, leading to site-specific changes in DNA methylation patterns at CpG sites

Verified by multiple studies
which leads to
3

These methylation changes occur preferentially at CpG sites that are part of the DunedinPACE epigenetic clock, which captures the pace of physiological decline through methylation linked to cellular maintenance and inflammation

Verified by multiple studies
which leads to
4

The same methylation changes do not occur at CpG sites that constitute the PhenoAge and GrimAge clocks, which are anchored to different biological processes including plasma protein levels and immune senescence

Verified by multiple studies
which leads to
5

The differential methylation response results in a measurable slowing of the DunedinPACE clock while leaving PhenoAge and GrimAge unchanged

Verified by multiple studies

Evidence from Studies

Supporting (1)

65

Community contributions welcome

65

EFFECT OF LONG-TERM CALORIC RESTRICTION ON THE PACE OF BIOLOGICAL AGING IN HEALTHY ADULTS FROM THE CALERIE TRIAL

Randomized Controlled Trial
Human

Contradicting (0)

0

Community contributions welcome

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.

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Source Study

EFFECT OF LONG-TERM CALORIC RESTRICTION ON THE PACE OF BIOLOGICAL AGING IN HEALTHY ADULTS FROM THE CALERIE TRIAL

Score: 65
DOI: 10.1093/geroni/igad104.0677

Similar Assertions

Cutting calories doesn’t seem to slow aging in healthy-weight adults when measured with certain DNA tests, and the effect might depend on which test you use.

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In healthy adults, following a reduced-calorie diet for two years does not change estimates of biological age based on PhenoAge or GrimAge DNA methylation markers, even though it slows the rate of aging measured by DunedinPACE.

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Cutting calories for two years doesn’t seem to change certain biological age clocks in healthy adults, even though other signs of aging improved.

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If healthy-weight adults eat 25% less food for two years, it might slow down how fast their body ages—based on a special aging test—though not all aging tests showed a change.

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In healthy adults aged 21 to 50, reducing calorie intake by 25% for two years slows the biological aging process as measured by a DNA methylation test called DunedinPACE, leading to a 2–3% slower aging rate, with stronger effects in those who reduce calories by 20% or more.

65
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90%