What distilled water is and who drinks it

Distilled water is water that has been boiled into steam and then cooled back into liquid form. This process removes minerals, salts, and most other substances dissolved in regular tap water. The result is nearly pure H₂O—water with almost nothing else in it.

People drink distilled water for different reasons. Some use it because they live in areas with hard water (water with high mineral content) and want to avoid mineral buildup in their bodies or appliances. Others use it to refill humidifiers, steam irons, or car radiators, where minerals would cause damage. A smaller group drinks it believing the absence of minerals offers health benefits, though that claim is debated among health professionals.

Distilled water is not the same as filtered water, spring water, or purified water—each of those processes removes different things and leaves different substances behind. Distilled water is the most stripped-down option available at most grocery stores.

Key Takeaways

  • Distilled water is created by boiling water into steam and condensing it back to liquid, which removes minerals and dissolved solids.
  • The main practical use is in appliances like humidifiers and car cooling systems, where minerals would cause buildup or damage.
  • Drinking distilled water regularly means your body gets no minerals from that water source, which may matter if your diet is already low in minerals.
  • Distilled water tastes noticeably flat to many people because the minerals that give water flavor are removed.
  • Long-term health effects of drinking only distilled water are not well studied, and most health organizations do not recommend it as your sole water source.

How distillation removes minerals and what stays behind

The distillation process works because water boils at a lower temperature than the minerals and salts dissolved in it. When tap water is heated to 212°F (100°C), it turns to steam while the minerals stay behind in the pot. The steam rises, cools, and condenses back into liquid water—but now without the minerals.

What gets removed depends on what was in the original water. Distillation removes calcium, magnesium, sodium, potassium, and other minerals. It also removes most bacteria, viruses, and chemical contaminants, though not all—some volatile chemicals can evaporate along with the water and end up in the distilled product. For that reason, distilled water is not considered a reliable way to remove all contaminants.

The result is water that is about 99.5% pure. It contains almost no dissolved solids, which is why it looks and tastes different from tap water—flatter, sometimes slightly bitter to people used to mineral-containing water.

Why people use distilled water in appliances instead of drinking it

Distilled water's main job is protecting machines. In humidifiers, minerals from tap water build up as white powder on the heating element and mist outlet, reducing how well the machine works. In car radiators and steam irons, mineral deposits can clog passages and cause overheating or malfunction. Distilled water prevents this buildup because there is nothing to deposit.

This is the reason distilled water is sold in hardware stores and automotive sections alongside appliance supplies. It is not primarily marketed as a drinking water—it is marketed as a maintenance product. Using it in these machines extends their lifespan and keeps them running efficiently.

For drinking, distilled water is less common in daily use. Most people who drink it do so occasionally or mix it with other water sources, rather than relying on it exclusively.

What happens to your body when you drink distilled water

When you drink distilled water, your body does not absorb minerals from that water because there are none. This matters only if you are not getting minerals from food. Most people eat enough calcium, magnesium, and potassium through dairy, vegetables, nuts, and grains that the mineral content of their drinking water makes little difference.

Some people worry that distilled water will "pull" minerals out of their bones or teeth. This is not how the body works. Your body regulates mineral levels through your kidneys and digestive system, not through osmosis with your drinking water. Drinking distilled water does not cause your body to lose minerals it needs.

That said, if distilled water is your only water source and your diet is already low in minerals, you would miss out on a small amount of mineral intake that tap water would have provided. This is a minor concern for most people but worth considering if you have a restricted diet or a condition affecting mineral absorption.

Distilled water compared to other types of drinking water

Different water types remove or keep different things. Filtered water passes through a physical filter that catches particles and sometimes chemicals, but minerals stay in. Spring water comes from underground sources and contains naturally occurring minerals. Purified water can be made through distillation, reverse osmosis, or other methods—the term is broad and does not specify which process was used.

Tap water in most developed countries is regulated and tested for safety, though mineral content varies by location. In areas with very hard water, some people prefer the taste of distilled or filtered water. In areas with soft water, tap water already tastes similar to distilled water.

None of these types is universally "better"—the choice depends on your water source, what you are using the water for, and your personal preference. For drinking, most health organizations recommend tap water or spring water because they contain minerals your body uses. For appliances, distilled water is the standard choice.

Cost and where to find distilled water

Distilled water is inexpensive and widely available. A gallon typically costs between $1 and $3 at grocery stores, drugstores, and hardware stores. Larger quantities cost less per gallon. Some people make their own distilled water at home using a distiller machine, which costs $50 to $200 upfront but saves money if you use large amounts regularly.

Distilled water is usually sold in plastic jugs in the water aisle, near filtered water and spring water. It is also sometimes stocked in the automotive section because of its use in car maintenance. Availability is consistent in most areas, though prices may vary by region and retailer.

Taste and practical considerations for daily use

Distilled water tastes noticeably flat to many people. Without minerals, it lacks the slight mineral taste that makes tap or spring water feel more substantial. Some people describe it as tasting "empty." If you are used to mineral-containing water, the taste difference is usually noticeable in the first few sips.

For cooking, distilled water works fine for most purposes. Some cooks prefer it for boiling pasta or rice because it does not leave mineral deposits on cookware. For tea and coffee, the flat taste is usually masked by the beverage itself, so the difference matters less.

If you are considering drinking distilled water regularly, start by mixing it with tap water or spring water to see how you feel. Many people find a blend more palatable than pure distilled water, and it also means you are getting some minerals from the other water source.

Frequently Asked Questions

Is distilled water safe to drink?

Yes, distilled water is safe to drink. It is not harmful to your body. The main consideration is that it contains no minerals, so if it is your only water source and your diet is low in minerals, you would miss out on a small amount of mineral intake. For most people eating a normal diet, this is not a concern.

Will drinking distilled water remove minerals from my bones?

No. Your body maintains mineral levels through your digestive system and kidneys, not through osmosis with your drinking water. Drinking distilled water does not cause your body to lose minerals from your bones or teeth.

Can I use distilled water in my humidifier?

Yes, and it is the recommended choice. Distilled water prevents mineral buildup inside the humidifier, which keeps it working properly and extends its lifespan. Tap water or mineral-containing water will leave white deposits that reduce performance.

Why does distilled water taste different?

Distilled water tastes flat because the minerals that give water flavor have been removed. Minerals like calcium and magnesium contribute a slight taste that many people associate with "fresh" water. Without them, distilled water can taste empty or slightly bitter to people used to mineral-containing water.

Is distilled water better than tap water for drinking?

Not necessarily. Tap water in most developed countries is regulated and tested for safety, and it contains minerals your body uses. Distilled water is useful for appliances and some people prefer its taste, but most health organizations do not recommend it as your primary drinking water because of the lack of minerals.