By Dr. Sanchari Sinha Dutta, Ph.D. Reviewed by Lauren Hardaker May 14 2026 Just four weeks of switching to diets rich in whole-food complex carbohydrates and plant-based foods shifted aging-related biomarker profiles in older adults. However, scientists say the changes may reflect rapid physiological adaptation rather than true age reversal.  Study: Short-Term Dietary Intervention Alters Physiological Profiles Relevant to Ageing . Image credit: Wuttichok Panichiwarapun/Shutterstock.com Short-