Studies on the Benefits of Alkaline Water

In recent years, alkaline water has gained popularity due to beliefs about its potential health benefits. However, these claims remain scientifically unproven and require further research. Here are some studies that have explored its effects:

• Bone Health:
  A 2009 study published in Bone journal involved 30 women around age 30. It found that those who drank alkaline mineral water (rich in bicarbonate and calcium) experienced reduced bone resorption compared to those who consumed acidic mineral water. Bone resorption is the process where old bone cells are broken down and replaced. Researchers suggested that alkaline water may support bone strength.
• Acid-Base Balance & Performance:
  A 2018 study in PLoS One involving 16 participants found that those who consumed alkaline water maintained better acid-base balance during intense anaerobic exercise and performed better than those who drank regular tap water.
• Digestive Enzymes & Reflux:
  A lab study published in 2012 in Annals of Otology, Rhinology & Laryngology indicated that alkaline water with a pH of 8.8 could deactivate pepsin—an enzyme that digests proteins in the stomach. This might help manage acid reflux symptoms. However, since the study was done in a lab (not on humans), more clinical trials are needed.
• Blood Pressure, Sugar, and Lipids:
  A preliminary 2001 study in the Shanghai Journal of Preventive Medicine suggested that ionized alkaline water might help regulate blood pressure, blood sugar, and blood lipids. These results are early findings and require more rigorous research.
• Hydration & Blood Viscosity:
  A 2016 study in the Journal of the International Society of Sports Nutrition found that after dehydration due to exercise, alkaline water reduced blood viscosity by 6.3%, compared to 3.36% with regular water. Lower viscosity may enhance circulation.

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Is Alkaline Water Good for Cancer?

Some people claim that alkaline water may lower cancer risk. However, there is no clinical evidence to support this. Drinking alkaline water does not prevent or treat cancer. A healthy lifestyle—rich in plant-based foods, physical activity, proper hydration, and avoiding smoking—remains the most effective way to reduce disease risk.

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What Is Alkaline Water?

Alkaline water has a pH level above 7, while standard drinking water has a neutral pH of 7. It can occur naturally in spring or well water or be produced using machines that raise its pH.

The pH scale affects how water dissolves nutrients and heavy metals. Acidic water (low pH) dissolves metals more easily, increasing their toxicity. In contrast, alkaline water dissolves fewer toxic metals.

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General Benefits of Water

Regardless of its type, water is essential for health. Benefits include:

• Hydration:
  Water helps regulate body temperature, support heart and joint health, flush out toxins, manage blood sugar, ease headaches, and improve skin.
• Brain Function:
  Even mild dehydration (1–3% body fluid loss) can impair memory, concentration, and cause fatigue or anxiety.
• Physical Performance:
  Muscles are ~80% water. Dehydration can reduce stamina, raise body temperature, and lead to fatigue—especially during workouts or outdoor labor.
• Kidney Health:
  Water helps transport waste in and out of cells. Proper hydration is essential to filter and remove toxins like urea through the kidneys.

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Risks & Safety of Alkaline Water

• Is It Safe?
  Alkaline water is generally safe for healthy individuals. However, those with kidney disease should avoid it. There is no established recommended daily intake, and overuse may cause problems.
• WHO Guidelines:
  The World Health Organization recommends drinking water with a pH not exceeding 8 to avoid corrosive properties that can be harmful.
• Possible Side Effects:
  • Skin and Eye Irritation: Alkaline water with a pH over 10 may irritate eyes and skin, as seen in animal studies.
  • Reduced Stomach Acidity: Lower acid levels in the stomach may weaken the body’s ability to kill harmful bacteria.
  • Alkalosis Risk: Excessive intake may disturb the body’s natural pH, leading to a condition called alkalosis. Symptoms include confusion, hand tremors, muscle spasms, nausea, and numbness in the limbs or face.

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Bottom Line

Despite its growing popularity, alkaline water’s health benefits are not backed by strong evidence. For most people, regular water is more than sufficient. The body is fully capable of regulating its internal pH without the need for special water.

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