Feeling Suddenly Older ? Scientists See Aging‘Waves’ at 44 and 60
Jul 10,2025 | Elfbar

The oldest millennials have entered their 40s and are noticing the effects of aging. It might not be in their heads.
In a study published in the journal Nature Aging in August, a team of Stanford scientists described “waves” of aging, where major biomolecular shifts happen in the body around ages 44 and 60.
“People assume everybody’s kind of aging gradually,” says Michael Snyder, a professor of genetics at Stanford University and senior author of the study. “It turns out that most changes are not linear.”
It is possible that paying special attention to healthy exercise and eating habits ahead of these waves could help lessen their blows, researchers say. In addition, people age differently, so no one number will be representative of how old or young everyone feels.