Can you drink distilled water
Last updated: April 1, 2026
Key Facts
- Distilled water is purified through distillation—boiling water and collecting condensed steam—removing minerals, salts, and impurities
- Drinking distilled water occasionally is safe, but long-term regular consumption may lead to mineral deficiencies since the body doesn't obtain minerals from water
- Medical and laboratory settings use distilled water because its purity prevents interference with precise measurements and processes
- Distilled water lacks essential minerals like calcium and magnesium that contribute to bone health and various body functions
- For regular hydration, mineral water, tap water, or spring water is generally recommended by health professionals over distilled water
What Is Distilled Water?
Distilled water is produced through distillation, a purification process where water is boiled and converted to steam, then condensed back into liquid form. This process removes dissolved minerals, salts, chemicals, and other impurities, leaving nearly pure H2O. The resulting water is often used in scientific laboratories, medical equipment, and industrial applications where purity is critical. Distilled water is commonly available in supermarkets and is inexpensive to produce.
Safety of Drinking Distilled Water
Distilled water is safe to drink and poses no immediate health risk. It contains no bacteria, viruses, or harmful chemicals that could cause acute illness. People have consumed distilled water without serious adverse effects in the short term. However, the absence of all minerals and electrolytes raises questions about long-term consumption patterns. Most health concerns relate to regular, prolonged use rather than occasional drinking.
Mineral Deficiency Concerns
The primary concern with long-term distilled water consumption is mineral deficiency. Humans obtain minerals like calcium, magnesium, and potassium not only from food but also from drinking water. Distilled water provides zero minerals, meaning your body cannot obtain these essential nutrients from your hydration source. Over extended periods, regular exclusive consumption of distilled water might contribute to mineral depletion, though diet typically compensates for this loss.
Medical and Laboratory Use
The medical and laboratory fields rely on distilled water precisely because it lacks minerals and contaminants. Distilled water won't interfere with chemical reactions, medical equipment calibration, or drug formulations. Hospitals, clinics, and research facilities use distilled water for cleaning equipment, preparing medications, and conducting experiments where any mineral presence would compromise results.
Recommendations for Daily Hydration
Health professionals generally recommend mineral water, tap water, or spring water for regular hydration. These sources provide necessary minerals while remaining safe and affordable. If you prefer distilled water for specific purposes, supplement it with mineral-rich foods like dairy products, leafy greens, and nuts. For most people, distilled water is acceptable for occasional use but shouldn't be your primary hydration source indefinitely.
Related Questions
What's the difference between distilled and spring water?
Spring water comes naturally from underground sources and contains minerals. Distilled water is purified through boiling and condensation, removing all minerals and impurities.
Can you use distilled water in a CPAP machine?
Yes, distilled water is recommended for CPAP humidifiers because its purity prevents mineral buildup in the machine. Using tap water can damage the equipment over time.
Is tap water safer than distilled water for drinking?
Tap water is generally safer for long-term consumption because it contains minerals your body needs. Both are safe, but tap water offers nutritional benefits distilled water lacks.
Sources
- Wikipedia - Distilled Water CC-BY-SA-4.0
- Mayo Clinic - Water: How much should you drink every day? Fair Use