MANILA, September 20 — A new study has found that a diet lower in fat and higher in carbohydrates, drawn from both plant and animal foods, was linked to biological-age markers several years lower than a high-fat diet after just four weeks of eating. The research, published in a peer-reviewed journal, compared two groups. One group ate a diet with less fat and more carbohydrates, primarily from whole, minimally processed foods.
The other group ate a high-fat diet. After four weeks, participants in the lower-fat, higher-carbohydrate group showed biological-age scores that were lower than those in the high-fat group, as measured by epigenetic clocks — biomarkers that estimate biological age based on DNA methylation patterns.
The gap was wide enough to be considered clinically meaningful, and the study’s authors say it may correlate with a reduced risk of age-related diseases. The findings add to a growing body of evidence that dietary composition can rapidly influence epigenetic measures of aging.
What the researchers measured
The study’s methodology involved measuring DNA methylation at specific sites to calculate epigenetic age. The biological-age difference was observed after adjusting for baseline age, sex, and other covariates, and the results were consistent across multiple epigenetic clocks, which the authors say strengthens the findings. The carbohydrate sources mattered.
The study’s authors emphasize that the carbohydrates were mainly whole, minimally processed foods — fruits, vegetables, whole grains, and legumes — rather than refined carbohydrates. The diet included both plant and animal foods, indicating that a balanced approach with reduced fat intake may be beneficial.
The study did not specify the exact number of participants or their demographics, but the results were statistically significant. The authors note that the results were surprising given the short duration of the trial.
Limitations and what comes next
The study’s limitations include its small sample size and short follow-up. The authors call for larger, longer-term trials to confirm the findings, and for replication in independent cohorts. They also recommend that individuals consult with their healthcare providers before making significant dietary changes.
The findings have implications for dietary guidelines, which currently emphasize reducing saturated fat and increasing whole grain intake. The results support these recommendations and suggest that the source of carbohydrates matters.
For communities across the region, the takeaway is a familiar one — what goes on the plate can shape health in ways that go beyond weight or energy. The study’s implications for public health are described as significant, since simple dietary changes could be a cost-effective way to promote healthy aging. Watch for larger trials with longer follow-up, and for research into whether these biological-age changes persist and translate into long-term health benefits.
