DunedinPACE measures biological aging more precisely than PhenoAge or GrimAge when people reduce their calorie intake for two years.
See the scientific wording
The DunedinPACE DNA methylation biomarker demonstrates greater sensitivity than PhenoAge and GrimAge in detecting changes in biological aging resulting from caloric restriction over a two-year period in healthy adults.
Very strong evidence
Randomized trialsOne good-quality study supports this claim.
What the research says
1 study reviewedSupporting (1)
Randomized Controlled TrialHuman2023
Scientists found that eating fewer calories slowed down a specific biological aging clock called DunedinPACE, but didn't change two other popular aging clocks. This means DunedinPACE is better at noticing small, early changes in aging from diet.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
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Eating fewer calories changes how chemical tags attach to DNA in blood cells, especially at sites linked to metabolism and inflammation. These changes make the body's aging process slower, and this slowdown is detected by the DunedinPACE biomarker because it is built from those specific DNA tags. Other aging biomarkers do not detect this change because they use different DNA sites that are not affected by calorie reduction.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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DunedinPACE measures biological aging more precisely than PhenoAge or GrimAge when people reduce their calorie intake for two years.
Mechanism
1 studyEating less food changes chemical marks on DNA in blood cells at specific spots tied to how fast the body ages. DunedinPACE detects these changes because it was built using those exact spots. Other aging tests use different spots that don't change much with less food, so they miss the effect.
Eating fewer calories changes how chemical tags attach to DNA in blood cells, especially at sites linked to metabolism and inflammation. These changes make the body's aging process slower, and this slowdown is detected by the DunedinPACE biomarker because it is built from those specific DNA tags. Other aging biomarkers do not detect this change because they use different DNA sites that are not affected by calorie reduction.
Reduced caloric intake lowers insulin and IGF-1 signaling and increases NAD+ availability in metabolic tissues
Altered metabolic signaling modulates the activity of enzymes that add or remove methyl groups from DNA at specific CpG sites in blood leukocytes
DNA methylation changes occur preferentially at CpG sites associated with physiological decline in metabolism, inflammation, and cellular repair
The pattern of methylation changes at these sites reduces the calculated pace of biological aging as defined by the DunedinPACE algorithm
The DunedinPACE algorithm captures this reduction because it is trained on CpG sites that respond to multi-system physiological decline, while PhenoAge and GrimAge use CpG sites less responsive to short-term metabolic shifts
Evidence from Studies
Supporting (1)
Community contributions welcome
Effect of long-term caloric restriction on DNA methylation measures of biological aging in healthy adults from the CALERIE trial
Scientists found that eating fewer calories slowed down a specific biological aging clock called DunedinPACE, but didn't change two other popular aging clocks. This means DunedinPACE is better at noticing small, early changes in aging from diet.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review Comparing DunedinPACE, PhenoAge, and GrimAge Sensitivity to Caloric Restriction in Healthy Adults
Population: Healthy adults undergoing controlled caloric restriction; Intervention: Caloric restriction for two years; Comparator: DunedinPACE, PhenoAge, and GrimAge biomarkers; Outcome: Change in biological aging score; Duration: Two years.
Randomized Controlled Trial of Caloric Restriction Comparing DunedinPACE, PhenoAge, and GrimAge Sensitivity in Healthy Adults
Population: Healthy adults aged 30–65; Intervention: 20–30% caloric restriction; Comparator: Ad libitum diet; Outcome: Change in DunedinPACE, PhenoAge, and GrimAge scores over two years; Duration: Two years.
Prospective Cohort Study of Caloric Restriction and Biological Aging Biomarkers in Healthy Adults
Population: Healthy adults enrolled in a long-term dietary intervention cohort; Intervention: Self-reported or monitored caloric restriction; Comparator: Non-restricted participants; Outcome: Longitudinal changes in biomarker scores over two years; Duration: Two years.
Cross-Sectional Comparison of DunedinPACE, PhenoAge, and GrimAge in Adults Following Long-Term Caloric Restriction
Population: Healthy adults with documented two-year caloric restriction history vs. controls; Intervention: Historical caloric restriction; Comparator: No restriction; Outcome: Current DunedinPACE, PhenoAge, and GrimAge scores; Duration: Single time point.
Case Report of DunedinPACE Sensitivity to Caloric Restriction in a Single Healthy Adult
Population: One healthy adult undergoing caloric restriction; Intervention: Two-year caloric restriction; Comparator: None; Outcome: Serial measurements of DunedinPACE, PhenoAge, and GrimAge; Duration: Two years.