Mint is an important source of monoterpenoids. These chemicals are responsible for the “minty” taste and aroma associated with mint plants. A number of varieties of mint contain varying levels of terpenoids including spearmint (Mentha spicata), peppermint (Mentha x piperita), apple mint (Mentha suaveolens), watermint (Mentha aquatica) and horsemint (Mentha longifolia). The monoterpenoid levels of the different mint plants vary because the pathway that synthesises them in the plants varies between the varieties of mint slightly. This means that the pathway produces varying amounts of intermediate metabolites and final products, depending on the genetic make-up of the plant in question. While all mint plants have a similar taste, subtle differences exist in the phytochemistry between the plants. Whether this would have an effect on the health of the individual consuming the plants is difficult to predict, but it is likely that all mint plants confer similar health effects to the consumer.
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