“John Oliver has a good video on it”
Good video on supplement industry misinformation.
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There's no such thing as an "immune booster". The immune system is incredibly complex and nuanced, and there isn't a knob (or 10) that you can tweak to turn it up or down. It exists in a continuum of largely understood configurations, and it can learn and adapt (not always with good results). If anything, "boosting" it as in turning up immune activity is usually terrible (think auto-immune disorders, inflammation, cancer). The "misinformation" people are battling is about a) unsubstantiated health claims and b) the fact that supplement manufacturers don't need to provide any evidence or follow any regulations regarding what's actually in the supplements. That means they can say they're selling e.g. Vitamin C but it's just sugar. John Oliver has a good video on it: this video
