reverse osmosis

Myth : Reverse Osmosis Kit Is The Best Solution For Drinking Water

Drinking water is the foremost in the list of human consumption, whether in cities or in villages, whether young or old, whether vegetarian or not. Urban lives are fraught with the limitations of large-scale municipal water purification that takes place beyond the public gaze. Suburban water sources, mainly rivers and wells are visibly too polluted to consume water directly from them. As in everything else that forms modern-day essentials, drinking water has moved from being an important, but obscure commodity to a branded product, often served with a label. Anything so close to human well-being cannot remain unaffected by business interests that push products through their loud promotions.

RO purifiers have been around the markets, finding widespread acceptance for some time. But more recently, there are theories declaring that completely demineralised RO water is the cause of many diseases and deficiencies. It is time to clear the air over what exactly is clean, healthy drinking water.

What Is RO?

Reverse osmosis is a membrane filtration process that pushes impure or raw water across microscopic pores by applying extreme pressure. The commercial RO unit removes not only the tiniest suspended impurities but also the salts from the input water. This brings the total dissolved salts (TDS) of the output water to nearly zero. If you are consuming water, and only water, where is the problem? You asked for clean pure water, didn’t you?  

Is Drinking Water Totally Devoid Of Salts Good For You?

Ordinary drinking water is expected to bring a large part of necessary calcium and magnesium to the body. WHO recommends that 20mg-30mg of magnesium and about 40mg-80mg of calcium is the optimal amount of minerals that must be a part of everyday drinking water. These minerals play an important role in the efficient functioning of the cardiovascular systems, healthy metabolism and ossification. This implies that any shortfall in consumption of calcium and magnesium will adversely affect health and well-being. Such demineralised water strips food of essential minerals when used for cooking, making drinks, juices and baby formula foods. Totally demineralised water is also known to attack metals in its contact, such as plumbing, utensils, bottles dissolving undesirable metals and other impurities into itself. 

There are widespread reportings of a range of health problems ranging from digestive disorders, CVD and even hair-loss. An unbiased interpretation of WHO findings indicates that long term consumption of demineralized (RO) water is bad for your health. 

We Already Use An RO Unit. What Now?

You don’t need to disconnect your RO system and throw it away. RO systems do a great job of removing impurities and contaminants from raw water. The problem with RO systems is that they cannot differentiate between good minerals and impurities as they simply remove everything. Remineralising such water is necessary once it has passed through the RO membrane. Adding back magnesium and calcium in proper concentrations fixes the problem that untreated harsh RO water poses. It also matters how the process of remineralisation is carried out and whether pure elemental magnesium and eco-safe calcium such as coral calcium is used. It is also important to ensure that your remineralisation cartridge has a slow release property. Ask your vendor all right questions and make an informed choice and ensure remineralisation.


You may read the full W.H.O. document that highlights health-risks of consuming low mineral water.


Author: Ashutosh Pradhan

17th October, 2017


Source:, W.H.O.    


[Disclaimer & Publisher’s Note: This article is a part of an ongoing series clarifying common food-myths. Organic Annadata is a citizen-driven expert-led safe food movement. Links and references are provided wherever appropriate and possible. This movement is vendor-neutral, brand-neutral, ideology-neutral pursuit of a scientific model of modern nutrition. We believe in the concept of food-miles and some of the content may be modelled for certain target audiences, more particularly in the geographic influence zone of Organic Annadata. Like with every advice on food, health and nutrition, we recommend you to take the content as a broad guideline and refer back to us if you believe any of it is inaccurate. Your feedback will be appreciated, referred to the experts on-board and a decision taken regarding contentious content.]

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