If time is relative, could two people age at drastically different rates just by living in different places on Earth?

Time isn’t as fixed as we think — it actually slows down or speeds up depending on how fast you’re moving or how strong gravity is where you are. So, could two people living in different parts of Earth really age at noticeably different rates? Like, could someone at the top of a mountain age a bit faster than someone at sea level? It’s wild to think about how relativity might be quietly messing with our clocks every day.