Alkaline Water Health Benefits: What the Evidence Actually Says

Alkaline water is one of the most discussed topics in the water filtration space. Here’s an honest, evidence-grounded look at what it is, what the research supports, and what to be sceptical of.

Browse our 8-stage KDF filter range (which produces mildly alkaline water) or see our Benchtop Water Filters Guide.

What Is Alkaline Water?

Water with a pH above 7 is alkaline. Most Australian tap water sits between pH 6.5 and 8.5. Our 8-stage KDF filter systems include mineral stone stages that release calcium, magnesium, and trace minerals, raising the water’s pH to approximately 8–9 naturally — without electricity or ionisation.

What the Evidence Supports

Mineral content: Alkaline water produced through natural mineral filtration contains calcium and magnesium, which contribute to daily mineral intake and support bone health. This is well-established.

Acid reflux: One small study found that alkaline water (pH 8.8) may help inactivate pepsin, a digestive enzyme linked to acid reflux symptoms. Evidence is preliminary but plausible.

Hydration: Better-tasting water means people drink more of it. This is the most consistent and practical benefit — adequate hydration supports energy, concentration, digestion, and kidney function.

Chlorine and contaminant removal: The filtration stages in our 8-stage systems remove chlorine, heavy metals, sediment, and bacteria — these are the most evidence-based benefits of our filter systems.

What to Be Sceptical Of

Claims around anti-ageing, cancer prevention, immune system enhancement, and “cellular absorption” are widely cited but not supported by robust clinical evidence. Your body tightly regulates blood pH regardless of what you drink — the kidneys and lungs maintain blood pH within a very narrow range (7.35–7.45). We don’t make these claims, and we’d encourage scepticism of any brand that does.

Frequently Asked Questions