Freshly squeezed corn juice can be stored overnight, but you need to be careful how you store it. The proper way to store corn juice is to pour it into an airtight container and store it in the refrigerator to slow down its decomposition and ensure its quality and taste.

If corn juice is stored overnight at room temperature or at higher temperatures in the summer, with or without an airtight seal, the potential for spoilage exists and it is usually not recommended. This is because bacterial reproduction is accelerated in warmer temperatures, causing corn juice to go bad. Consumption of spoiled corn juice may trigger abdominal discomfort such as diarrhea, abdominal pain, nausea and vomiting.

Also, for specific groups of people, such as pregnant women, infants and those with weakened immune systems, it is recommended to avoid consuming overnight corn juice to ensure food safety and health. The best practice is to consume corn juice as fresh as possible when making it and avoid keeping it for long periods of time.