A sedentary adult should drink 1.5 liters of water per day, said a study published in late September in the journal Les Cahiers de nutrition and dietetics. Each adult loses on average between 2 and 3 liters of water daily through urine and perspiration, among others, and must maintain its water balance balanced to avoid such a decrease vigilance. The risk of dehydration are mainly infants and elderly.

The authors of the study, Florence Constant, head of clinical research at Nestlé Waters France, and Eric Jequier, professor of physiology and nutrition expert, remember that dehydration results in adults decreases with concentration, alertness, performance, as well as fatigue and headache.

The sensation of thirst occurs when dehydration is already installed: the study authors therefore recommend drinking before feeling thirsty.

The healthy adults, weighing up to 60% water, precisely regulate their water balance, the number of liters of water present in the body. But infants and the elderly are the major risk of dehydration.

Even if parents know the severity of dehydration, two thirds barely can identify signs of dehydration observed in their infants, hence the importance of consulting health professionals.

Older people also more risk of dehydration than adults because they receive less water and lose more than adults.

Water supplies come from three sources: water beverage, food and water that produced by metabolism.

The authors had presented the initial findings of the study June 10 at the symposium “Water, hydration, sports.

Popcorn, and all foods from cereals such as those for breakfast, is rich in antioxidants, especially polyphenols. The study presented at the 238th National Meeting of the American Chemical Society, the United States, including the antioxidant reduced the risk of heart disease and cancer.

Not only is popcorn high in fiber, but also a level of antioxidants, and particularly the polyphenol, per gram equivalent to fruits and vegetables, says Dr. Joe Vinson, a chemist at the University of Scranton ( USA) and lead author of the study.

The products of wheat, corn, oats and rice have more antioxidants, “says Dr. Joe Vinson. And the popcorn had the highest percentage of antioxidants, compared to traditional snacks and snacks from cereals.

Polyphenols are major action on the body eliminate free radicals, causing damage to cells and tissues.

The 238th National Meeting of the American Chemical Society held from August 16 to 20 in Washington, the United States.

78% of towns are using products from organic farming in the menus of school meals, according to a survey conducted by the Federation of Mayors of towns (FMVM) and released September 2. Of these towns, 68% use less than 10% bio for these meals.

14% of these towns are using between 10% and 20% bio, and 8% over 20% bio at those meals served in schools. The bio is mostly used for vegetables, fruit and bread, but rarely for meat and starches.

On average 25 schools per city used 350,000 meals per year, or about 2,000 meals per day and per school. The average price of a meal was 6.50 euros, covers the purchase of food (32%), personnel costs (50%) and other costs (18%).

This survey was conducted in June and July in 87 towns of France, whose population is between 20,000 and 100,000.

It was performed including the full set up of the Grenelle Environment Forum, which provides that 20% of the food served in catering, including school canteens and catering operations, will be from agriculture organic in 2020.