Drinking water with low salt content (TDS) of natural origin or obtained from the process of reverse osmosis does not lead to harmful effects in the human body. This is based on the following points: 1) No public health organization in the world has clearly established minimum requirements for the composition of salts in water. 2) The mechanism of homeostasis maintains strict control of the composition of body fluids regardless of the TDS of drinking water in a healthy person under normal conditions. 3) A person receives most of the minerals from food. 4) None of the scientific papers describe the harmful effects on the human body from drinking low salt water (TDS). 5) Millions of people regularly consume water with a low TDS value of natural origin with no recorded signs of deterioration in health.

Thank you Vasilii Kurdiumov for the clear response. However it still needs scientific study.

It is very hard to answer this question since water quality standards basically are based on the maximum level of each component. To answer this question it is good to know about the important quality measures of the water.

Arash Yoosefdoost Yes, I appreciate your concern and therefore would like to know your views specifically on the RO water.

Emmanuel V Murray Yes, there is a need to conduct the clinical studies. I think that naturally we don't get anything in its purest form. Particularly the food we consume or the water we use is full of a range of compounds and minerals.

Drinking RO water maybe a similar scenario of just like inhaling 90 % pure oxygen ?

Vasilii Kurdiumov Yes, your views are clear but still there is a lack of long-term study on the health. If our food, water etc are pure and we are living healthy life then what may be the cause of so many diseases. Usually, medical system place it in lifestyle related category.

Dear Omkar S. Kushwaha, there have been studies which show that some hardness of water is essential for good health. As per the World health Organization "An inverse or protective association of water hardness with cardiovascular mortality was reported in most, but not all, studies. In studies involving very large geographical areas, there was a strong tendency to observe lower cardiovascular mortality with increasing hardness of drinking water sources." You can refer to the link below:

https://www.who.int/water_sanitation_health/dwq/nutrientschap10.pdf

I believe studies have shown that some compounds are more easily taken up from water than from food. Some, like Mg, is usually not enough of in food, so generally mineral water is good for you, although there is a risk you pay too much and you dont get what is promised.

Vijay K. Barwal Thank you for making us aware about the studies on the impact of the hardness of water on the cardiovascular mortality. Indeed, it is an eye opening to one and all, because the there are the increased number of such cases in every corner of this world.

Ketil Haarstad Yes, you are right. It is a known fact that Mg is required in certain quantity to make the function of the muscles and other organs work smoothly. As mentioned by the Vijay, I think you may shed more light on the cardiovascular mortality also.

Drs.Barwal, Kushawa, and Harstad bring up the importance of water type and quality to overall health: another element is access to, and availability of; safe foods. Water bottled in large container types can be the source of microplastics content in excreta - thus to treated wastewater discharges to surface water - where pastice scraps can be at sizes snd weights similar to colloidal particles but also strongly adsorb traces of toxic organic subtance (difficult to settle out and filter using ordinary wastewater treamtent methods).with both plastics and adsorbed toxics resistant to decay in surface waters. Measures of hardness as based on Barwal's statement is most often based on (dissolved) rock salts content of natural, fresh waters. These rock salts represent some of most environmentally-available minerals (eg. Ca CO3) availabile in fresh waters for humand and other animals - suggesting some evolutionary benefit. Dr. Harstad's point re. uptake (and rejection) of substances possibly links to some benefit of naturally occuring salts in waters. In Dr.KUshwaha's mention of studies of large geographic area linking hardnness to better health, other possibilities might attend to that very precise finding, e.g., how does the geo area affect the healh of the dwellers (does it improve the quality of/choices both water and food; and how has tha historically related to migmigration to the area: one might suspect there is some historical link to availability of both water type and food: for instance limited food options and small geo area. The suggestion appears be that as easily as better food and water are understood, what that represents is just one part of a bigger issue.

El agua es muy importante para la vida, pero de hecho se están investigando posibles efectos secundarios. Es cierto que al hervir el agua esta hace una base blanca en el fondo llamada magnesia que es perjudicial para el organismo humano.