What happens to mitochondria as we age? When we are young and healthy our mitochondria are working at 100%, delivering all the energy our cells need. We are growing, full of energy, we bounce back from illness and injury quickly, we sleep well and—for the most part—we are free from any serious health conditions.
As we get older our mitochondria naturally start to decline in function. They are thought to decline at around 10% per decade from our thirties and beyond. We don’t notice it immediately, but we start to have less energy, we don’t recover from illness or injury as quickly, and our immune systems decline, increasing the risk of serious health issues. Our organs age.
We start to look older as our skin cells no longer have the energy to produce as much collagen and elastin. Less visible changes happen inside us as well. We may start to notice small things like mental fogginess or heart health problems, for example, as our brain and circulatory system lose energy. We get by because our cells are incredibly clever at re-organizing their activity so that the main jobs get done.
But their lack of energy means some other important but non-urgent jobs don’t get done—like processing and removing waste or repairing cellular components. Over time we experience a slow breakdown of our cellular machinery. This starts to impact on how well our cells function and on our overall energy, health and wellbeing. What we are experiencing is the aging process
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