Absolute Vegetarian Diet Slows Biological Aging in the Short Term

A new study from Stanford University shows that an absolute vegetarian diet can slow the aging process at the molecular level in a short period, such as eight weeks. This research, published in the journal BMC Medicine, is part of a project called the Stanford Twins Study, which is also the subject of a new Netflix documentary series titled 'You Are What You Eat: A Twin Experiment.' The study involved 22 pairs of identical twins who were randomly divided into two different groups. Half of the participants were assigned to a healthy absolute vegetarian diet, while the other half followed a healthy omnivorous diet. During the first four weeks, meals were prepared by a food delivery company, and in the second half, participants were responsible for their own meal preparation. Dr. Christopher Gardner, a professor of medicine and nutrition scientist at Stanford University and the lead author of the study, stated, 'The terms vegetarian and omnivore are very broad, and you may have poor food choices that align with these dietary patterns.' He added, 'Both groups were instructed to consume high vegetable and fiber diets while minimizing refined grains and sugar.' At the end of the study, results showed that participants on the absolute vegetarian diet consumed fewer calories, lost more weight, and showed significant improvements in bad cholesterol and fasting insulin levels. However, the more interesting point was the improvement in epigenetic markers related to aging in this group. Epigenetic markers act like hidden clocks in human genes that determine our biological age. Accordingly, you may be forty years old, but your biological age can vary based on factors like diet and exercise. Dr. Varun Dwaraka, director of bioinformatics and a lead researcher at TruDiagnostic, commented, 'Epigenetic changes can alter gene expression and make you more or less susceptible to various forms of disease.' This study indicates that even short-term dietary changes can have significant effects on biological aging. However, Dwaraka warns that the results of this study cannot accurately assess the long-term effects of absolute vegetarianism or omnivorism due to the time limitations. He noted, 'We cannot say anything beyond eight weeks because, for instance, an absolute vegetarian diet without vitamin B12 supplementation can have detrimental health effects.' More studies are needed to evaluate the long-term effects of plant-based diets on biological aging and other health indicators. Nevertheless, this study suggests that diet and lifestyle can play an important role in slowing biological aging.