You might be surprised to learn that drinking purified water isn’t necessarily "not supposed to," but rather, there are specific reasons why some people choose to avoid it or supplement it. The primary concerns revolve around the removal of beneficial minerals and potential acidity.
Is Purified Water Bad for You? Understanding the Nuances
The question of whether we are "not supposed to drink purified water" is a common one, often stemming from a misunderstanding of what purification processes do. While purified water is safe to drink and free from contaminants, the purification process itself can strip away naturally occurring minerals that are beneficial for our health. This doesn’t mean it’s inherently harmful, but it does mean it lacks the mineral content found in other water sources.
What Exactly is Purified Water?
Purified water is essentially water that has had virtually all impurities removed. This includes dissolved salts, organic matter, and other microscopic particles. Common purification methods include:
- Distillation: Heating water to steam and then condensing it back into liquid, leaving impurities behind.
- Reverse Osmosis (RO): Forcing water through a semi-permeable membrane that blocks contaminants.
- Deionization: Using ion exchange resins to remove dissolved ions (salts).
- Ultraviolet (UV) Treatment: Using UV light to kill microorganisms.
These methods produce water that is exceptionally clean, making it ideal for industrial processes and laboratory use. For drinking, it means a lack of taste and, critically, a lack of minerals.
Why the Concern About Mineral Depletion?
Our bodies need minerals like calcium, magnesium, and potassium for various functions, from bone health to nerve signaling. While we get most of our minerals from food, water can be a significant source. When you drink water that has had these minerals removed, you miss out on this potential contribution.
Long-term consumption of demineralized water might be a concern for individuals who already have low mineral intake from their diet. Some studies suggest that drinking demineralized water could lead to:
- Increased excretion of minerals from the body.
- A potential impact on electrolyte balance.
- A less satisfying taste, which can affect hydration habits.
It’s important to note that the scientific community is still researching the long-term effects of drinking only purified water. However, the general consensus is that while safe, it’s not necessarily optimal for everyone.
Does Purified Water Affect Your Body’s pH Balance?
Another point of discussion is the pH level of purified water. Because most minerals act as buffers, their removal can sometimes result in purified water having a slightly acidic pH (below 7.0). While the human body has robust systems to maintain its own pH balance, some argue that consistently consuming acidic water could add a slight burden to these systems.
However, the impact of water’s pH on the body’s overall pH is often overstated. Your digestive system and other biological processes are highly effective at regulating pH. The food you eat has a far greater impact on your body’s pH than the water you drink.
The Benefits of Purified Water (and How to Mitigate Drawbacks)
Despite the concerns, purified water does offer significant advantages, especially for those with contaminated water sources. The key is to understand these benefits and how to compensate for any perceived drawbacks.
Safety and Purity
The most significant benefit of purified water is its safety. It is free from:
- Bacteria and viruses
- Heavy metals (like lead and mercury)
- Pesticides and herbicides
- Chlorine and other chemicals
For individuals living in areas with poor water quality, a purification system like reverse osmosis can be a lifesaver, ensuring access to clean, safe drinking water.
Improved Taste and Odor
Many people find that purified water has a cleaner, more neutral taste and odor compared to tap water, which can sometimes have a metallic or chemical smell due to treatment processes. This improved taste can encourage greater water consumption, leading to better hydration.
How to Re-mineralize Your Purified Water
If you’re concerned about the lack of minerals in purified water, there are simple solutions:
- Add Mineral Drops: You can purchase specially formulated mineral drops containing essential electrolytes.
- Use a Re-mineralization Filter: Some advanced water filter systems include a post-filter that adds beneficial minerals back into the water.
- Consume Mineral-Rich Foods: Ensure your diet is rich in fruits, vegetables, and other foods that provide essential minerals.
- Consider Blending Sources: If you have access to both purified and mineral-rich water (like spring water), you can blend them.
Comparing Water Types
To better understand the differences, let’s look at a comparison of common water types:
| Water Type | Mineral Content | Typical pH | Purification Method | Key Benefit | Potential Drawback |
|---|---|---|---|---|---|
| Tap Water | Varies | 6.5-8.5 | Chlorination, filtration | Accessible, often contains beneficial minerals | Can contain contaminants, taste/odor issues |
| Purified Water | Very Low | 5.5-7.0 | RO, Distillation, Deionization | High purity, free from contaminants | Lacks beneficial minerals, potentially acidic |
| Spring Water | Moderate to High | 7.0-8.5 | Natural filtration through rocks and soil | Natural mineral source, good taste | Can be expensive, source variability |
| Mineral Water | High | 7.0-8.5 | Sourced from mineral springs, bottled at source | Rich in essential minerals | Can be expensive, high sodium content in some |
| Filtered Water | Varies | Varies | Activated carbon, sediment filters | Removes some contaminants and improves taste | Mineral content depends on filter type |
Expert Opinions and Recommendations
Many health professionals agree that while purified water is safe for consumption, it’s not necessarily the most beneficial choice for daily hydration if it’s the only source. They often recommend:
- Using purified water for specific needs (e.g., cooking, baby formula) if your tap water is questionable.
- Ensuring your overall diet is mineral-rich.
- Considering filtered tap water or blended sources for regular drinking.
- Consulting with a healthcare provider for personalized advice, especially if you have specific health conditions.
Frequently Asked Questions About Purified Water
Here are some common questions people ask about drinking purified water:
### Can drinking purified water cause health problems?
Generally, drinking purified water is not considered to cause direct health problems for most people. The primary concern is the lack of essential minerals, which could be an issue for individuals with very low dietary mineral intake over the long term. However, your body has robust