Britons are generally well-versed in the basics of good health. But even those who approach their well-being with the finest intentions make basic mistakes, according to a preventive medicine specialist.
Doctor Dore Jalaei, a health consultant at Reborne Longevity Clinic, explained to GB News that these errors persist not from a lack of knowledge but rather because public discussion around living longer is distracting.
"Most people approaching their health with the best intentions are still making the same fundamental errors," Dr Jalaei said. "Not through ignorance but because the mainstream conversation about longevity has been dominated by noise rather than biology."
One of the most pervasive yet unrecognised issues involves persistent low-level dehydration.
Most people don't realise they're in a state of mild dehydration
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"Most people spend most of their lives mildly dehydrated without registering thirst," Dr Jalaei shared.
And the consequences extend beyond simple discomfort; they affect multiple bodily systems simultaneously. In the long-term, this takes a toll at a fundamental biological level.
"Even mild dehydration impairs cognitive performance, elevates heart rate and places strain on renal function," the consultant warned.
"Over the years, inadequate hydration is increasingly linked to accelerated biological ageing at the cellular level," Dr Jalaei added.
Too often, this damage accumulates silently and goes unnoticed until significant harm has occurred.
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The next most overlooked factor that compromises longevity, according to Dr Jalaei, concerns the body's muscular tissue.
"Skeletal muscle is not just aesthetic," Dr Jalaei declared. "It is the primary site of glucose disposal, a major regulator of metabolic rate and a predictor of all-cause mortality.
"Grip strength alone has been shown to predict cardiovascular outcomes with remarkable accuracy. Most people do not begin serious resistance training until the decline is already underway."
These minor daily decisions, Dr Jalaei cautioned, compound over decades into quantifiable biological deterioration. This includes the consumption of ultra-processed foods - another significant threat to longevity.
"The NOVA classification of ultra-processed foods has reshaped nutritional epidemiology. These foods are designed to be hyperpalatable, calorically dense, and nutritionally hollow," Dr Jalaei stated.
Ultra-processed foods are a threat to longevity
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"Beyond caloric considerations, additives, emulsifiers, and artificial sweeteners in these products appear to directly disrupt gut microbiome composition and drive low-grade systemic inflammation."
Research published in Nature Climate Change last year revealed that repeated heatwave exposure accelerates the ageing process, with harmful effects comparable to smoking and alcohol consumption.
Extreme temperatures strain the cardiovascular and renal systems, while cumulative cellular damage, including DNA deterioration and chronic inflammation, may independently hasten biological decline.
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