To get the full effect of Ionized Water, it should be consumed fresh right out of the ionizer. We recommend use within 18 hours of electrolysis. Water directly from the ionizer is loaded with hydroxyl ions will have thousands of tiny bubbles in it. These ions (shown by -ORP) provide the antioxidant benefits from drinking ionized water. Research has found that newly ionized water is more powerful than refrigerated or stored ionized water. ORP values are more negative and the molecular cluster structure of the water is optimal if consumed fresh. The ionized water's ability to remove free radicals also diminishes with time. While the freshness and effects of ionized water may decrease over time, it is still beneficial for human health.