Alkaline water and pH – what does research actually say, and who could benefit?

Interest in alkaline water has not arisen by coincidence. In recent years, research has pointed to a specific biological mechanism in which water with a higher pH may affect the enzyme pepsin – an enzyme that plays a central role in reflux and stomach irritation.

Alkaline water is not a miracle solution.
But it is not without scientific relevance either.

This article explores what we know today, what current research suggests, and when an alkaline filter may be a relevant choice.

What is alkaline water?

Alkaline water is water with a pH value above 7. Regular drinking water in Denmark typically ranges between pH 7 and 8, depending on local water quality.

An alkaline filter can further increase the water’s pH value – in some cases by up to approximately +1.5 pH units – depending on the starting composition of the water.

This means that the chemical profile of the water is actively adjusted, not only filtered

Pepsin, pH and reflux – the biological mechanism

The enzyme pepsin is active in the stomach and helps break down proteins. In cases of reflux, pepsin can move up into the esophagus and contribute to irritation.

A laboratory study published via PubMed showed that water with a pH of around 8.8 may inactivate pepsin under controlled conditions.

Source:
Potential benefits of alkaline water in the treatment of reflux disease
https://pubmed.ncbi.nlm.nih.gov/22844861/

The study does not demonstrate that alkaline water is a treatment. However, it documents a measurable biochemical effect, which helps explain why the topic has gained scientific attention

Clinical observations – promising findings

In a later study, a combination of alkaline water and a plant-based diet was compared with conventional medical treatment for reflux. The results showed comparable symptom improvement within the study population.

Source:
A Comparison of Alkaline Water and Mediterranean Diet vs Proton Pump Inhibition
https://pubmed.ncbi.nlm.nih.gov/PMC5710251/

The study was not randomized, and research in this area is still evolving. However, the findings are sufficiently noteworthy that alkalinity in drinking water is now taken seriously within scientific communities

Does alkaline water affect the body’s pH?

The pH of the blood is tightly regulated by the body’s own buffering systems. It does not change as a result of drinking alkaline water.

What may potentially be influenced is the local environment in the stomach and esophagus – as well as the subjective experience of the water itself.

Harvard Health and the Mayo Clinic emphasize that alkaline water does not alter the body’s overall acid–base balance, but may have local and temporary effects.

Sources:
Harvard Health – Is alkaline water better?
https://www.health.harvard.edu/staying-healthy/is-alkaline-water-better

Mayo Clinic – Alkaline water: Better than plain water?
https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/alkaline-water/faq-20058029

Coffee, stomach acid and drinking habits

Coffee can stimulate stomach acid production in sensitive individuals. For those who drink large amounts of coffee or experience a tendency toward reflux, it may be relevant to look at their overall beverage profile – not just the coffee itself.

Alkaline water does not “neutralize” the body systemically. However, for some people, water with a higher pH is perceived as milder and less sharp.

It is individual – but not arbitrary.

When does an alkaline filter make sense?

For most households, a standard filter that reduces chlorine and improves taste will be sufficient.

An alkaline filter is a specialized choice.

It may be relevant for you if you:

– experience a sensitive stomach or a tendency toward reflux
– wish to experiment with the chemical profile of your water
– want to optimize the taste experience in coffee and tea
– are looking for more than classic filtration

At PurelyAqua, we offer the LAICA bi-flux® AlkaWater – a filter designed to increase the water’s pH by up to approximately +1.5 units, depending on the starting composition of the water.

Mål effekten selv

Effekten af et alkalisk filter afhænger af dit lokale vand.

Derfor kan du med fordel måle dit udgangspunkt. Vi tilbyder at sende en pH-målestrimmel med din næste bestilling, så du selv kan følge ændringen.

Det gør beslutningen konkret.

Konklusion

Alkalisk vand er ikke en universalløsning. Men det er et dokumenteret forskningsområde med identificerede biologiske mekanismer.

For nogle husholdninger er et standardfilter tilstrækkeligt.
For andre kan et alkalisk filter være et relevant supplement.

Det handler ikke om hype.
Det handler om at forstå sit vand – og vælge bevidst.