What Occurs within the Body?
As we age, almost every function in the body slows down. Not all at once and not for everyone in the same way, but the underlying cause is the same throughout the body. Fortunately, humans are adaptable and can adjust to these changes.
Many issues that are often blamed on aging are actually the result of diseases, not aging itself. Some common signs of aging don’t appear in everyone, and while aging can’t be reversed, many diseases can be treated or prevented. That’s why it’s important to distinguish between the two.
Changes in Body Composition
The body gradually loses water, minerals, and collagen, leading to changes in the skin, hair, and nails, as well as in the bones, joints, and blood vessels.
Hormone Production Declines
The glands produce fewer hormones, and tissues become less responsive to them. This affects sleep, immunity, memory, and overall health. Some scientists believe aging itself is a result of hormonal changes. Key hormones involved in aging include estrogen, testosterone, cortisol, growth hormone, melatonin, insulin, and thyroid hormones. Maintaining a healthy balance of these is essential for well-being.
Gut Microbiota Weakens
The variety of beneficial bacteria in the gut decreases with age. The older we get, the more our microbiota is affected by diseases, medications, and diet.
In young people, gut bacteria levels remain relatively stable, but in older adults, the difference can be 100 to 1,000 times greater between individuals. Eating fiber-rich and fermented foods helps support a healthy gut microbiome.
The Body Becomes Weaker
Physical decline begins around age 30—at first slowly, but by 40, both heart and muscle strength decrease, along with movement speed and coordination.
Other common effects include pain from illness, slower healing, reduced senses, lower muscle tone, weaker bones, and declining energy levels. Many people become dependent on medical treatment and medications.
Aging also triggers the diseases that most people eventually die from, including heart disease, cancer, and diabetes.