Calorie restriction is the surest, most potent method of slowing aging extending lifespan in animals - and, presumably, humans.
Why?
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Over 85 years ago, Clive McCay discovered that by feeding his lab rats much less than they would eat on their own, they lived longer - a lot longer. academic.oup.com/jn/article/140…
Since then, calorie restriction (CR) has been repeated thousands of times, and is the only non-genetic method that has extended lifespan in every species tried.
Clearly, CR targets a process or processes fundamental to living things.
The high consumption of seed (vegetable) oils could play a significant role in severe Covid disease, and might even explain between-country variation in mortality.
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Omega-6 fatty acids are abundant in seed oils and their consumption leads to a pro-inflammatory state, in turn leading to a cytokine storm which is associated with Covid mortality.
Excessive consumption of linoleic acid, the most abundant component of seed oils, leads to imbalanced tissue fatty acids.