Using those numbers as reference, we can calculate that if an observer at sea level stayed there for 100 years, someone who would have stayed on the Everest would be older by roughly 0.003 seconds. Technically yes, relative to an observer on Earth, a person at higher altitudes will age faster.

According to Einstein's Theory of General Relativity, you actually age slightly faster at a higher altitude, not less. This phenomenon is known as "Gravitational Time Dilation." Gravity curves spacetime, and the closer you are to a massive body (like Earth), the slower time passes. Therefore, someone living at sea level (where gravity is stronger) ages slightly more slowly than someone living at the top of a mountain or in a high-altitude city like Denver or La Paz. This isn't just a theoretical concept; it has been proven using ultra-precise atomic clocks. For example, over a 70-year lifetime, a person living at high altitude might be a few microseconds older than their sea-level twin. However, the difference is so infinitesimally small that it has no measurable effect on human biology or longevity. Ironically, the increased exposure to UV radiation at higher altitudes can actually lead to faster visible skin aging, which far outweighs the microscopic "time travel" gained from being further from the Earth's core.