The Claim

In healthy non-obese adults, two years of sustained moderate caloric restriction slows the pace of biological aging as measured by the DunedinPACE DNA methylation algorithm, with a standardized effect size of -0.25 to -0.29, corresponding to a 2–3% reduction in the rate of biological aging, and this effect is statistically significant (P < 0.003).

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

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
65score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

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.

See the scientific wording

Two years of caloric restriction in healthy non-obese adults slows the pace of biological aging as measured by the DunedinPACE DNA methylation algorithm, with a standardized effect size of -0.25 to -0.29, corresponding to a 2–3% reduction in the rate of biological aging. This effect was maintained over 24 months and was statistically significant (P < 0.003), indicating that sustained moderate caloric restriction can modify a molecular biomarker of aging dynamics in humans.

Why this might work

Eating fewer calories for two years changes chemical tags on DNA in blood cells, which turns down genes that drive inflammation and metabolic stress. This causes the body's systems—like the heart, kidneys, and immune system—to break down more slowly over time, which is measured as a slower aging rate.

Verified mechanismbased on 1 study

What the research says

1 study

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

    This study found that adults who ate fewer calories for two years without getting malnourished had a slower rate of cellular aging, as measured by a special DNA test called DunedinPACE. So yes, cutting back a bit on food might help your body age more slowly at the molecular level.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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