To preserve juice from a juicer, you should store it immediately in an airtight glass container, preferably in the refrigerator. Exposure to air and UV light can cause oxidation, which degrades the quality and taste of the juice. It’s best to consume the juice within 24 hours to maintain its maximum nutritional benefits and freshness. If you need to keep the juice for longer, you can freeze it, but it’s important to leave some headspace at the top of the container to allow for expansion during freezing. Thaw the juice in the refrigerator before consuming it.