Yes, it's a immunity booster, can be consumed by adults and kids, but it has added sweeteners which you should be careful about. Also there many foods like tumeric, ginger and ginger powder whole spices, lemon which are good for immunity. Vit D,E C, zinc, protein, also play an important role so check your levels and supplements for the same.
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Also, look into things that reduce immunity, like lack of sleep, alcohol, smoking, stress, poor nutrition, defecienes,