Life can be pretty awesome, and there’s nothing more frustrating than having to miss out on the fun because you’re feeling under the weather. Everyone’s off an adventure, and you’re stuck inside nursing a cold or other illness. While there’s no way (yet) to avoid getting sick entirely, there are ways you can reduce the number of times you fall ill, and that’s by boosting your immune system. You don’t have to settle for whatever illness-busting system you were born with; you can strengthen it, and, what’s more, is that you can do in natural ways. We take a look at four ways below.