Children and young teenagers given pure fruit juice have higher intakes of key nutrients compared with those who chose other drinks, a study suggests.
Children aged between two and five who drank 100 per cent fruit juice had significantly higher intakes of vitamin C, potassium, and magnesium and significantly lower intakes of added sugars compared to non-fruit juice consumers.
The researchers, who used the three year National Health and Nutrition Examination Survey to compare the diets, also found a link between juice consumption and eating fruit and whole-grain food.
Researchers at the Louisiana State University Agricultural Center and Baylor College of Medicine said children aged between six and 12 also showed a higher intake of key nutrients, as well as dietary fibres.
By contrast the American scientists found a significantly higher percentage of non-fruit juice drinkers aged from two to 18 failed to meet the recommended levels for several key nutrients, including vitamins A and C and folate.
Dr Carol O’Neil said: “One hundred per cent fruit juice plays an important role in the diets of children and teens, supplying important nutrients during a key period of growth and development.”
The survey comes as other research shows that juice and smoothies can rot teeth and contribute to obesity.
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May 21st, 2010 at 11:05 am
Beetroot juice boosts stamina by making muscles more fuel-efficient, scientists have found.
The same researchers said last year that the red vegetable juice can increase physical endurance.
The study focused on men aged 19 to 38 cycling on exercise bikes.
Drinking half a litre of beetroot juice a day for a week enabled them to cycle 16 per cent longer before getting tired out.
Now the scientists believe they understand how the beetroot boost works.
They found that drinking beetroot juice doubled the amount of nitrate in the blood of volunteers, and reduced the rate at which muscles used their main source of energy.
Beetroot juice helped muscles work more efficiently and lowered their oxygen uptake.
Study leader Professor Andy Jones, from the University of Exeter’s School of Sport and Health Sciences, said: ‘Since our first study came out we have seen growing interest in the benefits of drinking beetroot juice in the world of professional sport.
‘I expect this study to attract even more attention from athletes.’
Drinking beetroot was found to increase blood nitrate levels and reduce muscle usage of adenosine triphosphate, the body’s chief energy source.
Oxygen uptake by muscles was also lowered, said the study published in the Journal of Applied Physiology.
http://www.dailymail.co.uk/health/article-1279703/Beetroot-juice-boosts-stamina-making-muscles-efficient.html