Did you know that all those minerals are low in sodium and that nitrates and nitrites can be indicators of pollution? Here's how to read the labels
"Drink so much water". Here we go again with the obvious summer tips. And yet, behind the choice of the right type of water, there is a world of factors to consider. First, the right daily quantity. A variable factor based on sex, age and lifestyles. However, nutritionists agree to indicate, as a minimum, 2.5 liters of water per day for men and 2 for women. And in any case never go below 1.5 liters. In diets, then, drinking lots of water helps counteract water retention. Not only: it also helps intestinal regularity, given the greater amount of fiber deriving from the many vegetables that usually a low-calorie regime prescribes.
Natural or sparkling?
And then, the choice of choices: natural or sparkling? Hands up who has never had a doubt fantozziano in front of large quantities of water with bubbles. In reality, there is no study that does not recommend sparkling water in favor of natural water. I am absolutely equivalent. However, there are gods cases in which it is better not to overdo the sparkling water: i children, for example, already struggling with other fizzy drinks; and those who suffer from gastritis, meteorism and acid reflux.
Eye to the salt
Another highly publicized element, the presence of sodium, which causes an increase in pressure and therefore – among other consequences – a greater demand for water. So it's true, they serve water low in sodium. But all the waters oligominerals they have a very low sodium content: therefore, if due to pressure or other pathologies it is intended to act on nutrition, it is much better to control the use of table salt and above all to reduce the consumption of salty foods.
For newborns for those suffering from osteoporosis
Then there is the whole chapter of the rich waters of football. They are very important for newborns and for those suffering from osteoporosis. In low calorie dietsthen, they help to compensate for the lower intake of calcium due to the reduction of dairy products which they usually involve. But there are also the contraindications: some studies, in particular, advise against them in the event of calculations or kidney problems.
The fixed residue
Well. But ultimately, what are the parameters to be evaluated on the label to choose the right water? A first discriminating factor is constituted by the fixed residue, ie the quantity of salts dissolved in a liter of water. In this sense the waters are distinguished in minimally mineralized if it is less than 50 mg / l (usually people who suffer from kidney stones); oligomineral or slightly mineralized if the fixed residue is between 50 and 500 mg / l (a characteristic that favors diuresis and a decrease in excess sodium); medium mineral if the fixed residue is between 500 and 1000 mg / l; is particularly rich in salts if it is higher than 1000, the latter categories to which calcium-rich waters suitable for infants belong to dilute powdered artificial milk.
Eye also to florurs
Among the minerals listed in the table on the label, attention must be paid above all to the presence of nitrites and nitrates. Two substances that, if present in high quantities, can be synonymous with pollution (deriving above all from fertilizers used in agriculture): for nitrates, in particular, the legal limit is quite high, equal to 45 mg / l. But the best mineral waters available on the market have a much lower level of nitrates: the law itself, if water is used for feeding infants, provides that this value must not exceed 10 mg / l. Therefore, it is better to choose mineral waters that respect this last threshold. The limit for i neighing, potentially toxic substances whose legal limit is 0.02 mg / l (in better waters they are not even present). Eye also to fluorides, which can be harmful beyond a certain limit, given that even here the law allows a maximum value of 5 mg / l for adults and 1.5 for children (better, therefore, to keep to this last limit); and to thearsenic, potentially carcinogenic element admitted up to the threshold – very low – of 10 micrograms per liter.
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