What's Happening to Your Body Right Now?
Enter your current age and discover decade-by-decade facts about how the human body ages — from metabolism changes to hair graying timelines, vision shifts, and more.
The Science of Aging
Aging is a natural biological process that affects every organ system. After age 30, muscle mass decreases by about 3-8% per decade. Metabolism slows roughly 1-2% per decade. Bone density peaks around 30 and gradually declines. These are averages — lifestyle choices like exercise, diet, and sleep can significantly slow many of these changes.
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Frequently Asked Questions
At what age does the body start aging?
Biological aging begins in your mid-20s, but most noticeable changes start after 30. Collagen production drops ~1% per year starting around 25, and muscle mass begins declining around 30.
Can I slow down aging?
Yes! Regular exercise, a healthy diet, quality sleep, stress management, and sun protection are all scientifically proven to slow many aspects of biological aging.
Why does metabolism slow with age?
Primarily due to loss of muscle mass (which burns more calories at rest) and hormonal changes. Strength training can help maintain muscle mass and metabolic rate.