Reverse Osmosis: healthy or harmful?

We all want to drink the cleanest possible water so many of us turn to water filtration systems to do the job. Reverse Osmosis (RO) systems are well known to excel at removing unhealthy contaminants from tap water. A good RO system can remove contaminants such as arsenic, nitrates, sodium, copper and lead, some organic chemicals and fluoride. But in our great enthusiasm to clear out impurities from our tap water, are we also removing the beneficial minerals from the water in the same process?

According to a study by the World Health Organization (WHO) the answer is yes! RO removes 92-99 per cent of beneficial calcium and magnesium from the water leaving the water demineralized. Removing these vital minerals from the water has been identified as a health risk by the WHO study which cites increased risks in conditions such as gastrointestinal problems, bone density issues, joint conditions and cardiovascular disease.

And not only is demineralized water possibly a health risk, it also leaves the water tasteless and flat rendering it unappealing to the palate. If it doesn’t taste good it’s very likely that you will not be motivated to drink enough water to keep properly hydrated. That can compound other health problems. Dehydration slows your metabolism down as well as the natural healing process of the body. Chronic dehydration can lead to fatigue, constipation, high blood pressure, digestive disorders, respiratory issues, weight gain, skin disorders, joint pain and premature aging.

But it gets even worse. Because RO water doesn’t have enough minerals, when it is consumed it actually leaches minerals from the body.

One of the primary reasons that RO water is unhealthy is that by removing the minerals the water becomes acidic (often well below 7.0pH) which does not help maintain a healthy pH balance in the blood, which should be slightly alkaline. Acidosis has been identified as being a major cause of most degenerative diseases.

While reverse osmosis is effective for removing a variety of contaminants, most systems do not remove volatile organic chemicals, chlorine and chloramines, pharmaceuticals and a host of other synthetic chemicals found in municipal water.

If you currently have an RO system and are not yet ready to give it up try getting a remineralisation cartridge or add on to your system.

There are a number of excellent water filtration systems that remove harmful contaminants from the water without demineralizing it. For more information:

WHO Study: Health risks from drinking demineralised water:

One thought on “Reverse Osmosis: healthy or harmful?

  1. Actually, any discussion of the pH of demineralized water is nonsence. Water requires the presence of ions for there to be a pH and since RO removes all of the ions then there is no pH to even talk about. The measurment of acid pH with RO is only because it will immediatly begin to absorb ions and the easiest ions to absorb is CO2 whic is the source of the acid reading but it is such a small amount of ions that it will easily swing to alkaline with the smallest addition of alkaline ions.

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