American researchers concluded that human aging progresses not uniformly, but in two distinct phases—around ages 44 and 60. Experiments revealed that significant alterations occur in both appearance and internal systems during these age periods. The study’s author, Stanford University genetics professor Michael Snyder, notes that sharp age-related shifts impact crucial biological processes. Over 100 volunteers aged 25 to 75 participated in the work. Over one to seven years, participants regularly provided blood and stool samples, as well as swabs from their skin, mouth, and nose. Analysis demonstrated that the greatest changes in molecular composition occurred between ages 40 and 60. The initial “surge” of age-related changes affected molecules linked to cardiovascular ailments, and the metabolism of caffeine and alcohol. The second stage involved the immune system, carbohydrate processing, and kidney function. However, modifications affecting the condition of skin and muscles were registered at both 44 and 60 years old.
About the Author
