Many of the herbs and spices can be used in more than one way. For example:
Curry can clear out the digestive system, create heat in cold weather and can kill of bacteria or viruses which might threaten people's health.
Mint, basil and many of these have properties which can aid in other matters. Corriander seeds and cinnamon can help induce and protect love, for example - in addition to being excellent flavor with brown sugar and butter on toast or other pastries, as well as being nice to sprinkle into coffee for a splash of super flavor.
I'm still not sure what mistletoe really does, but hopefully I'll find out eventually.