If healthy adults eat 20% less food, it might slow down how fast their body ages — and the more they cut calories, the more it slows, according to one study.

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Evidence from Studies

Supporting (1)

59

Community contributions welcome

59

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

The study tested cutting calories by 25% and found it slowed a measure of biological aging called DunedinPACE, which supports the idea that eating less can slow aging. The claim says 20% less food slows aging even more, which is close to what the study found, though the study doesn’t prove the exact amount of benefit claimed.

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

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

Score: 59

DOI: 10.1038/s43587-022-00357-y

Similar Assertions

Cutting calories helps people get healthier, and while a DNA aging test called DunedinPACE shows some of these benefits, it only catches a small part of the full picture.

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73%

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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71%