Alkaline water doesn't expire in the same way food does by becoming unsafe to drink, but its beneficial alkaline properties do diminish over time. This means that while the water itself may remain potable, it will gradually lose the elevated pH level that gives it its "alkaline" characteristic.
According to the provided reference, alkaline ionized water is best consumed fresh. The alkaline properties are strongest within the first 3 days. While the properties will be retained for 1-2 weeks when stored properly, they weaken beyond this period.
Understanding Alkaline Water Shelf Life
The "expiration" of alkaline water is primarily about the loss of its alkalinity, not spoilage. This typically happens as the water interacts with carbon dioxide in the air, which can lower its pH.
Key points regarding its shelf life:
- Loss of pH: The main change is a reduction in the water's pH level back towards neutral.
- Diminished Benefits: As the pH drops, the potential health benefits associated with higher alkalinity may decrease.
- Safety: The water itself usually remains safe to drink unless contaminated externally, but it simply becomes regular water.
Optimal Storage for Alkaline Water
To maximize the retention of alkaline properties, proper storage is crucial. Follow these guidelines:
- Container Choice:
- Use airtight glass or stainless steel containers. These materials help prevent interaction with air and other substances that can alter pH.
- Avoid storing ionized water in aluminum containers.
- Temperature: Store in a cool place or refrigerate. Lower temperatures can help slow down the process of the pH decreasing.
- Keep it Sealed: Ensure the container is airtight to minimize exposure to carbon dioxide in the atmosphere.
Storage Comparison
| Container Type | Best for Alkaline Water? | Notes |
|---|---|---|
| Airtight Glass | Yes | Excellent for retaining properties |
| Airtight Stainless Steel | Yes | Durable and good for retaining pH |
| Aluminum | No | Avoid |
| Open Container | No | Allows rapid loss of alkalinity |
By following these storage tips, you can help preserve the alkaline properties of your water for the stated 1-2 weeks, ensuring you get the most benefit from it, especially within the first few days.
