A Method For Reducing Biological Age In Four Weeks Has Been Revealed
- 29.09.2026, 9:53
I need to change my diet.
Just four weeks of dietary changes proved sufficient to affect certain indicators of health in older adults. Australian researchers found that, for most participants in the experiment, their estimated biological age was lower after the dietary adjustments than it had been at the start of the study.
This was reported by Science Daily, citing a study by researchers at the University of Sydney.
The research was led by Dr. Caitlin Andrews of the School of Life and Environmental Sciences.
How the Experiment Was Conducted
The study involved 104 Australian residents aged 65 to 75. For one month, the volunteers followed four different dietary plans. The researchers sought to determine how the ratio of key nutrients in the diet affects the body’s biological indicators.
The amount of protein in all diet plans remained constant at 14% of total caloric intake. However, the researchers varied the ratio of plant-based to animal-based protein sources.
In one subset of the groups, the proportions were equal, while in the other, plant-based protein accounted for 70% of the total protein. Additionally, the researchers adjusted the fat and carbohydrate content of the diets.
The study included non-smoking volunteers with a body mass index between 20 and 35. The participants did not follow a vegetarian diet and did not have a number of serious health conditions, including type 2 diabetes, cancer, or severe liver or kidney dysfunction.
How the participants’ biological age was determined
To evaluate the results, the researchers did not rely on external changes or the participants’ subjective feelings. Instead, they used a set of 20 biological indicators to calculate the body’s biological age.
Among the parameters studied were the concentrations of insulin, cholesterol, and C-reactive protein in the blood.
Biological age reflects the body’s functional state and may differ from chronological age—that is, the number of years lived. Even among people of the same age, there can be significant differences in metabolism, cardiovascular function, and the severity of inflammatory processes.
What Changes Occurred Over Four Weeks
At the conclusion of the experiment, the researchers found that in three of the four groups, the combination of indicators studied corresponded to a younger estimated biological age compared to the start of the study.
The exception was the participants who received a diet high in fat and containing equal proportions of plant-based and animal-based protein. No significant changes were observed in this group.
It is noteworthy that this particular diet was the closest to the volunteers’ usual diet prior to the start of the experiment.
Which diet showed the most noticeable results
The researchers observed the most pronounced statistically significant changes in participants who followed an omnivorous diet with a relatively low fat content and a higher proportion of carbohydrates.
In this dietary regimen, carbohydrates accounted for 53% of the total energy content of the foods, fats for 28–29%, and proteins for 14%.
The findings suggest a possible link between dietary composition and changes in biological markers in older adults. However, they do not allow us to conclude that any specific diet is guaranteed to slow down aging.
Can a Change in Diet Be Considered a Way to Extend Life?
Despite the results obtained, scientists are not yet able to determine how long the observed effect lasts. The experiment lasted only four weeks, so it is unknown whether the changes in biological indicators will persist with long-term adherence to the corresponding diet.
Furthermore, the study does not prove that dietary changes can increase life expectancy or prevent diseases whose likelihood of developing increases with age.
Longer-term observations are needed to establish such a connection. The researchers also emphasize the importance of conducting additional experiments involving other groups of people to verify the reproducibility of the results.