why do people age?

People age because our bodies are made up of trillions of cells, and these cells go through changes over time. Imagine cells like little machines that keep our bodies working. With time, these machines don’t work as well as they used to. Here’s why:

Cells divide and grow to replace old ones and repair damages, but each time they divide, a bit of their instructions (DNA) can get worn out or copied wrong. This leads to errors and wear and tear on our body.

Also, cells produce things called free radicals as they work, which can harm cells and their parts. Our body has ways to clean up these free radicals, but over time, they can build up and cause damage.

Our body’s processes also slow down as we get older. For example, we make less collagen, which keeps our skin elastic. Our immune system doesn’t work as strongly to protect us from germs, and our organs might not work as efficiently.

So, aging is a mix of the natural breakdown of our cells, accumulation of small damages, and changes in how our body functions over the years.

Technically, people start to age from the moment they are born. Aging is a continuous process that begins right after conception and goes on throughout our lives. However, the signs of aging that we typically notice, like wrinkles or grey hair, usually begin to show later in life, usually around the mid to late 20s for some subtle signs, and more prominently in the 30s and beyond.

Think of it like a tree growing rings. Each year, the tree adds a new ring, representing its growth. Similarly, our bodies grow and change every day, but the effects of aging that we visually recognize take a bit longer to become noticeable. From a biological standpoint, some aspects of aging begin at a cellular level from the beginning of life.

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