Getting older brings many benefits, such as wisdom and cultivating meaningful relationships. These advantages are usually crowded out by fears of mental and physical decline. The harmful effects of ageing are far from inevitable, however.
Research shows you have varying degrees of agency over your health and offers concrete steps to lower your risk of the most ruthless killers – cancer, heart disease and Alzheimer’s.
Research has found regularly taking selenium may reduce your risk of all three.
Selenium is an essential trace mineral that is naturally present in many foods, added to others, and available as a dietary supplement.
Take cancer first. Selenium may help lower the risk of certain cancers – an association that has been attributed to selenium’s ability to reduce DNA damage and oxidative stress, boost your immune system, and destroy cancer cells.
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In an analysis of 25 observational studies, a 50 percent increase in blood selenium levels was associated with a 24 percent reduction in the risk of heart disease.
Selenium may also lower markers of inflammation in your body — one of the main risk factors for heart disease.
For example, a review of 16 controlled studies including over 433,000 people with heart disease showed that taking selenium supplements decreased levels of the inflammatory marker C-reactive protein (CRP).
Additionally, it increased levels of glutathione peroxidase, a powerful antioxidant.
This indicates that selenium may help lower heart disease risk by reducing inflammation and oxidative stress in your body.
A barrier against brain decline
Selenium has also shown promise in reducing risk of Alzheimer’s disease, an irreversible, progressive brain disorder that slowly destroys memory and thinking skills.
Oxidative stress is believed to be involved in both the onset and progression of neurological diseases like Parkinson’s, multiple sclerosis, and Alzheimer’s.
Selenium has shown promise in reducing oxidative stress.
Several studies have also shown that patients with Alzheimer’s disease have lower blood levels of selenium.
Additionally, some studies have found that antioxidants in both foods and supplements may improve memory in patients with Alzheimer’s.
What’s more, one small study found that supplementing with one selenium-rich Brazil nut per day improved verbal fluency and other mental functions in patients with mild cognitive impairment.
What’s more, the Mediterranean diet, which is rich in high-selenium foods like seafood and nuts, has been associated with a lower risk of developing Alzheimer’s disease.
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