Dietary Changes and Biological Aging: A Study from the University of Sydney

Recent research suggests that altering your diet, even in later years, can slow the aging process in as little as one month. Scientists from the University of Sydney conducted a study involving 104 participants aged 65-75, assigning them to one of four dietary plans.

Study Details

Two diets included proteins from both animals and plants, while the other two obtained 70% of protein from plant sources. Among the omnivorous diets, one was high in fat and the other focused on carbohydrates. The semi-vegetarian diets shared this distinction, with all obtaining 14% of energy from protein.

The study measured the impact of diet on ‘biological age,’ which reflects health indicators rather than chronological age.

Researchers evaluated 20 different biomarkers, such as cholesterol and insulin levels, to determine how short-term dietary modifications affect biological aging.

Key Findings

The research indicated that while chronological age increases consistently, biological aging differs among individuals based on health condition and bodily resilience. According to the findings, biomarker profiles can be a better measure of overall health and potential lifespan compared to chronological age.

Participants who consumed diets rich in complex carbohydrates and plant-based foods showed a reduction in their biological age after four weeks. Conversely, those on a high-fat omnivorous diet did not experience meaningful changes in biological age.

Conclusions

The study, published in Aging Cell, highlighted notable improvements in those consuming complex-carbohydrate and plant-based diets. However, the researchers noted that these findings are preliminary and may only reflect short-term effects.

“It’s too soon to confirm that dietary changes will extend lifespan,” stated Caitlin Andrews, who led the study, “but early indications of benefits are evident.”