How to live longer is a question many people wish they knew the answer to.
Many people know that quitting smoking can cut your risk of dying from cancer related to smoking and slash your risk of stroke.
Another key to longevity is exercise and eating a healthy, balanced diet, according to the NHS.
One drink recommended by medical consultant Dr Sarah Brewer and dietitian Juliette Kellow is coffee.
When it comes to fluid intake and living longer, almost all fluids count, say the pair. The only exception is alcohol, which promotes dehydration.
One of the keys to longevity is exercise and eating a healthy, balanced diet
But how much coffee should you drink a day to reap the benefits?
In their book titled ‘Eat Better Live Longer’, Dr Brewer and Ms Kellow say moderate amounts of coffee (four cups a day) may confer some health gains.
They write: “Coffee has beneficial antioxidants and may reduce the risk of Alzheimer’s disease.
“Research links a higher intake of caffeine (present in tea and coffee) to a lower risk of dementia.
“One study found that women with high caffeine intakes had less cognitive decline over four years than those consuming low amounts.”
How to live longer: Drinking a certain amount of coffee a day can offer health benefits
How to live longer: Exercise and eating a healthy, balanced diet is one of the keys to longevity
One food recommended to increase life expectancy is the banana.
The pair say whether you like bananas slightly green or freckly, they all come with high levels of mood-boosting powers. They are also good sources of carbohydrates (fuel for the brain and muscle), and of tryptophan and vitamin B6 (both of which are needed for production of feel-good chemicals).
Dr Brewer and Ms Kellow add that bananas improve digestion and may help regulate blood pressure.
So how often should you eat them?
In their book titled ‘Eat Better Live Longer’, the duo recommend eating three to four bananas a week.
How to live longer: Four cups of coffee a day to reduce your risk of Alzheimer’s disease
But they do write: “However you like to eat your bananas is a personal preference, but their benefits do vary with their ripeness.”
The duo go on to list bananas’ numerous health benefits.
Reduce the risk of kidney cancer
The women cite a 13-year study of Swedish women where higher stakes of all fruits reduced the risk of renal cancer, but bananas seemed to offer the best protection.
They add: “An earlier study also found eating at least four bananas a week (rather than less than three a month) resulted in a 50 per cent reduction in the risk of kidney cancer.”
Blood pressure help
Studies confirm that increasing your potassium intake (by eating bananas) while reducing your sodium intake can help maintain a healthy blood pressure.
Dr Brewer and Ms Kellow write: “This is important because the World Health Organization estimates high blood pressure causes around 51 per cent of deaths from stroke.”