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Claim
Strong Support
causal
Analysis v4

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...

65
Pro
0
Against

Mechanism

Synthesis from 1 study

How it works

Eating 25% fewer calories for two years changes how the body marks its DNA, turning down genes that drive inflammation and metabolic decline. These DNA changes slow the rate at which the body's systems deteriorate over time, as measured by a specific biological aging test.

Most probable mechanism

In Simple Terms

When a person eats 25% fewer calories for two years, their body uses less energy and shifts how it processes nutrients. This change reduces signals that promote inflammation and aging, which causes specific marks on DNA to change. These DNA marks control how genes related to metabolism and immune function are turned on or off, leading to a slower decline in the body's systems over time.

Causal chain
1

Reduced energy intake lowers circulating insulin and insulin-like growth factor 1 levels and increases cellular NAD+ availability

Supported by evidence
which leads to
2

Altered metabolic signaling modulates the activity of enzymes that add or remove methyl groups from DNA at specific cytosine-guanine sites

Supported by evidence
which leads to
3

DNA methylation changes occur at CpG sites associated with physiological aging trajectories, particularly in genes regulating inflammation, lipid metabolism, and cellular repair

Verified by multiple studies
which leads to
4

These methylation patterns reduce the rate of multi-system physiological decline, including in metabolic, cardiovascular, and immune functions

Verified by multiple studies

Evidence from Studies

Supporting (1)

65

Community contributions welcome

65

Effect of long-term caloric restriction on DNA methylation measures of biological aging in healthy adults from the CALERIE trial

Randomized Controlled Trial
Human
2023 Mar

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 DNA methylation measures of biological aging in healthy adults from the CALERIE trial

Score: 65
DOI: 10.1038/s43587-022-00357-y

Similar Assertions

Cutting calories a bit for two years might slow how fast your body ages on a cellular level, according to a study on healthy adults who aren’t overweight.

65
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95%

In adults who are not obese, eating 25% fewer calories for two years is linked to a 3% slower rate of biological aging based on a DNA methylation test called DunedinPACE.

65
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94%

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

65
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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.

65
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88%