High-protein diets shorten lifespan, two studies say

High-protein diets shorten lifespan, two studies say

And so the pendulum swings yet again about nutrition, and protein specifically, this time towards the establishment; other posts indicate a differing trend.

There are two anomalies – at least – here. The first is that the study extrapolates data from mice, who are not quite human; and the second is that other factors in modern protein production, such as chemical and hormone usage, has probably not been taken into consideration.

At least the discussion is now getting away from a focus exclusively on carbohydrates – sugars – and exploring the other main dietary components – protein and fats. Our contention is that the jury is still out with respect to protein, and we have yet to fully appreciate proteins and their building blocks – amino acids – from a medicinal perspective.

The pendulum will probably continue to swing until we recognise that the balance that hunter-gatherers knew and experienced – cycles of feasting and fasting – are an integral part of our physiological make-up!

The jury is still out…

 

Source: AAP

 

PEOPLE on high-protein diets are likely to lose years of life along with the weight they shed, according to two studies.

It’s nearly as bad as smoking, says Dr Valter Longo, co-author of a study in the journal Cell Metabolism.

The most healthy mix is high-carbohydrate, low protein diet, say Australian scientists who have published a study in the same journal.

This leads to increased body fat, but a longer lifespan, say the scientists from the University of Sydney’s Charles Perkins Centre. They tested 25 different diet combinations on 900 mice to see what happened to their appetite, metabolic health, ageing and lifespan.

Calories aren’t all the same, says Professor Steve Simpson, academic director at the centre.

“We need to look at where the calories come from and how they interact.” Although the mice on a high-protein diet ate less and were slimmer, they also had a reduced lifespan and poor heart and overall health.

Those on a high-carbohydrate, low-protein diet ate more and got fat, but lived longest.

The mice that ate a high-fat, low-protein diet died quickest. “It is an enormous leap in our understanding of the impact of diet quality and diet balance on food intake, health, ageing and longevity,” Prof Simpson says.

Co-author Professor David Le Couteur says the study is an important step towards understanding what constitutes a healthy balanced diet.

It indicates it might be beneficial for people to eat the right diet in the right proportions and let the body dictate the correct amount of food.

“If people want to live long, healthy lives they can look at their diet and exercise. That will do more good than taking all the pills in the world.” He says the healthiest mice had the lowest levels of the branched-chain amino acids derived from animal protein and often used by body builders The results are entirely parallel with the US study.

They found meat, fish and dairy products are probably causing harm.

“We provide convincing evidence that a high-protein diet, particularly if the proteins are derived from animals, is nearly as bad as smoking,” says the University of Southern California’s Dr Longo.

His study analysed the diet of 6831 middle-aged and older adults.

Those who derived more than 20 per cent of their calories from protein were four times more likely to die of cancer or diabetes than other people.

And so the pendulum swings yet again about nutrition, and protein specifically, this time towards the establishment; other posts indicate a differing trend.

There are two anomalies – at least – here. The first is that the study extrapolates data from mice, who are not quite human; and the second is that other factors in modern protein production, such as chemical and hormone usage, has probably not been taken into consideration.

At least the discussion is now getting away from a focus exclusively on carbohydrates – sugars – and exploring the other main dietary components – protein and fats. Our contention is that the jury is still out with respect to protein, and we have yet to fully appreciate proteins and their building blocks – amino acids – from a medicinal perspective.

The pendulum will probably continue to swing until we recognise that the balance that hunter-gatherers knew and experienced – cycles of feasting and fasting – are an integral part of our physiological make-up!

The jury is still out…

 

Source: AAP

 

PEOPLE on high-protein diets are likely to lose years of life along with the weight they shed, according to two studies.

It’s nearly as bad as smoking, says Dr Valter Longo, co-author of a study in the journal Cell Metabolism.

The most healthy mix is high-carbohydrate, low protein diet, say Australian scientists who have published a study in the same journal.

This leads to increased body fat, but a longer lifespan, say the scientists from the University of Sydney’s Charles Perkins Centre. They tested 25 different diet combinations on 900 mice to see what happened to their appetite, metabolic health, ageing and lifespan.

Calories aren’t all the same, says Professor Steve Simpson, academic director at the centre.

“We need to look at where the calories come from and how they interact.” Although the mice on a high-protein diet ate less and were slimmer, they also had a reduced lifespan and poor heart and overall health.

Those on a high-carbohydrate, low-protein diet ate more and got fat, but lived longest.

The mice that ate a high-fat, low-protein diet died quickest. “It is an enormous leap in our understanding of the impact of diet quality and diet balance on food intake, health, ageing and longevity,” Prof Simpson says.

Co-author Professor David Le Couteur says the study is an important step towards understanding what constitutes a healthy balanced diet.

It indicates it might be beneficial for people to eat the right diet in the right proportions and let the body dictate the correct amount of food.

“If people want to live long, healthy lives they can look at their diet and exercise. That will do more good than taking all the pills in the world.” He says the healthiest mice had the lowest levels of the branched-chain amino acids derived from animal protein and often used by body builders The results are entirely parallel with the US study.

They found meat, fish and dairy products are probably causing harm.

“We provide convincing evidence that a high-protein diet, particularly if the proteins are derived from animals, is nearly as bad as smoking,” says the University of Southern California’s Dr Longo.

His study analysed the diet of 6831 middle-aged and older adults.

Those who derived more than 20 per cent of their calories from protein were four times more likely to die of cancer or diabetes than other people.