why plant based milk can be stored for almost a year but once opened has to be consumed within 7 days?

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why plant based milk can be stored for almost a year but once opened has to be consumed within 7 days?

In: Biology
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In the manufacturing process, it’s heated and sterilised then packaged in a sealed and airtight container.

As soon as you open it, fresh air gets in, which refreshes the oxygen in the container and allows it to start spoiling. Oxygen is the main thing that makes things go bad.

I’ll be honest, if you open it and pour a tiny bit out, it’ll only let a tiny bit of oxygen in – it’ll probably be okay for longer than 7 days. But since at that point the manufacturer cannon ensure that it will be okay after a week, they tell you to use it within that week.

Hope that helped.

This isn’t specific to plant-based milks but all milks (and other foods too) that have been sterilized at high temperatures. Once you open the package it is no longer sterile, and any microorganisms that have gotten in can then start spoiling the product.