The immune system is an extremely complicated mix of cells, organs and tissues that interact with each other to expel harmful pathogens and other foreign substances from the body. Therefore, it’s one of the most important parts of the body, and we should do our best to look after it.

There are a number of ways you can protect your immune system, and many of them relate to lifestyle choices. Smoking, excessive drinking and sleep deprivation can all lower our body's defenses so they should be avoided, and we should take steps to avoid infection by sanitizing your hands whenever we touch food or dirty surfaces. This will help ensure that the immune system isn't given extra, unnecessary work to do.

There are, however, a number of foods we can add to our diet which can help boost the immune system's ability to do its job. Here are six of the very best:

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