Researchers reported measurable reductions in biological age among older adults following plant-focused, carbohydrate-rich diets during a four-week clinical trial.
By yourNEWS Media Newsroom
A newly published study in the journal Aging Cell found that older adults who adopted diets emphasizing complex carbohydrates and plant-based foods experienced measurable reductions in biological age within just four weeks, adding to growing research examining the relationship between nutrition and cellular aging.
The study, conducted by researchers at the University of Sydney, followed 104 adults between the ages of 65 and 75 who had no major underlying health conditions. Scientists evaluated how different dietary patterns influenced biological age, which is determined through biomarkers associated with cellular and molecular aging processes rather than chronological years.
Participants were divided into four dietary groups: omnivorous high-fat, omnivorous high-carbohydrate, semi-vegetarian high-fat, and semi-vegetarian high-carbohydrate. Researchers found that individuals consuming the omnivorous high-carbohydrate diet demonstrated the largest average reduction in biological age, measured at 4.1 years. Participants in the semi-vegetarian high-fat group showed a 3.2-year reduction, while those in the semi-vegetarian high-carbohydrate group recorded a 2.9-year decrease. The omnivorous high-fat group showed no significant biological age change during the study period.
Researchers said the findings build upon earlier evidence linking dietary quality with epigenetic aging markers. According to a report from NaturalNews.com, prior studies have shown that Mediterranean-style dietary patterns have been associated with reductions in epigenetic age ranging from 0.58 to 1.5 years.
At the beginning of the trial, all participants were non-smokers and none identified as vegetarians. Their body mass indexes ranged between 20 and 35. Omnivorous meal plans consisted of equal portions of plant and animal protein sources, while semi-vegetarian diets contained approximately 70 percent plant-based foods and 30 percent animal-derived foods.
Scientists monitored 20 health biomarkers before and after the intervention, including cholesterol, triglycerides, insulin levels, blood pressure, body mass index, and waist circumference. Laboratory analysis was then used to calculate changes in biological age.
The omnivorous high-carbohydrate group consumed diets in which approximately 53 percent of energy came from complex carbohydrates, while protein accounted for 14 percent and fat represented about 28 to 29 percent of caloric intake. Foods emphasized in the plan included legumes, whole grains, and starchy vegetables.
Researchers suggested that fiber-rich foods and complex carbohydrates may contribute to reduced inflammation and improved cholesterol levels, potentially lowering risk factors associated with chronic illnesses such as cardiovascular disease.
The study’s findings were also consistent with broader research supporting whole-food, plant-focused diets. Shireen Kassam and Zahra Kassam have previously argued that patients “should be encouraged to eat a diet composed of fruit, vegetables, whole grains, legumes, nuts and seeds due to consistent long-term benefits for health.” Research by T. Colin Campbell similarly promotes whole-food, plant-based nutrition as a strategy for addressing chronic disease through dietary intervention.
Lead author Dr. Caitlin Andrews of the University of Sydney’s School of Life and Environmental Sciences cautioned against drawing sweeping conclusions from the short-term study.
“It’s too soon to say definitively that specific changes to diet will extend your life,” Andrews said. “But this research offers an early indication of the potential benefits of dietary changes later in life.”
Study co-author Dr. Alistair Senior, an associate professor affiliated with both the School of Life and Environmental Sciences and the Charles Perkins Centre, also stressed the need for additional research.
“Longer term dietary changes are needed to assess whether dietary changes alter the risk of age-related diseases,” Senior said.
Researchers acknowledged several limitations in the trial, including the relatively small participant pool and the brief four-week duration. While the results demonstrated short-term improvements in biomarkers associated with aging, scientists said further investigation is needed to determine whether these changes produce lasting reductions in diseases such as diabetes, heart disease, or cognitive decline.
The study adds to ongoing research exploring how nutrition may influence epigenetic processes tied to aging. Separate investigations have examined dietary strategies involving compounds known as “methyl adaptogens,” which some researchers believe may influence methylation pathways associated with biological aging.
Although researchers cautioned that broader conclusions cannot yet be made, the findings suggest that dietary interventions later in life may still influence biological processes associated with aging and long-term health outcomes.
Source: Natural News
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