Since childhood, we are always advised to drink 8 glasses of water per day. But, who first submitted the recommendation? What is the reason? Is it true that humans need 8 glasses of water per day? What is the size of the glass used? Should the water needs be met only through drinking water? Are there any bad effects if people drink more water than they need? Does this recommendation apply equally to all ages, races, climates, genders, and activities? Is this recommendation “ridden” in the interests of the bottled water supply industry?
On July 12, 2011, dr. Margaret McCartney, a doctor in Glasgow, England, wrote an article published in BMJ medical journals. The article contains the opinion of Dr. McCartney regarding the facts behind the Hydration for Health claim, a professional organization that states that drinking 1.5 to 2 liters of water per day will provide many benefits to human life. According to Dr. McCartney, claims of Hydration for Health that increasing water intake in children will improve academic performance and in adults can reduce the incidence of obesity and chronic kidney failure, not based on valid research. This claim is also considered to be full of the interests of the bottled drinking water supply industry because Hydration for Health was formed and sponsored by the Danone Group, a multinational company that produces various bottled drinking water products, such as Volvic, Evian, Badoit, and Aqua.
Heinz Valtin’s publication in the American Journal of Physiology (2002) states that there is no scientific evidence to support the truth of the suggestion to drink 8 glasses of water per day. Editorial Professor Stanley Goldfarb in the Journal of the American Society of Nephrology (2008) also noted almost the same conclusion, that there is no supporting scientific evidence, both health benefits and dangers obtained through the intake of 8 glasses of water per day. After Prof. Stanley Goldfarb published the article, he was visited by two representatives of the Danone Group who showed a graph of the decline in their product sales figures. Dr. Margaret McCartney, Heinz Valtin, and Professor Stanley Goldfarb have created a polemic among the general public and health professionals regarding the truth of the suggestion to drink 8 glasses of water per day.
Sound grown-ups can give thirst a chance to be their guide since thirst is the living being’s essential criticism instrument for keeping away from parchedness. In any case, this system is debilitated in youngsters and the elderly and can’t be depended upon totally.
Keeping in mind the end goal to remain hydrated, one’s admission of liquids must match their yields. How much that precisely is relies upon your body constitution, age, sex, physical action levels, and furthermore on natural conditions, for example, temperature and stickiness. The sufficient day by day liquid admissions as set by the European Food Safety Authority and by the NHS fluctuate between 1.6-2.5 liter per day. These volumes apply to states of direct ecological temperature and direct physical movement and should be expended for the duration of the day.
The European Food Safety Authority (EFSA) agrees with the Food and Nutrition Board that the amount of water needs cannot be determined precisely because it is related to the amount of calorie consumption, insensible water losses, and the kidney capacity of each individual. EFSA gives general recommendations of how much water should I drink a day chart :
In 2004, the Food and Nutrition Board to revise the recommendations, how much water should you drink every day to be:
- Healthy individuals can meet their daily water needs by following the natural guides his thirst.
- There is no specific value on the amount of water requirements, but general recommendations for women and men 2.7 liters 3.7 liters of water per day.
- These needs can be met from all kinds of food and beverages (including caffeinated beverages) are consumed daily.
- Strenuous physical activity and heat exposure will increase human water needs
For the sole reason for hydration, there is no subjective contrast between plain water and water from nourishments and different refreshments. As per the Annual Review on Nutrition, sustenance and metabolic oxidation can in actuality conceal to 20-40% of the every day liquid admission. However when contrasted with numerous different refreshments, water has the upside of being sans sugar. The Scientific Advisory Committee on Nutrition has as of late prescribed that utilization of sugar-sweetened beverages ought to be limited by the two grown-ups and youngsters.