The Maya added Mexican marigold as a flavorant to tobacco.
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Mexican marigold is classed as a culinary herb, and is non-toxic to humans.
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Scientists identify contents of ancient Maya drug containers
Scientists have identified the presence of a non-tobacco plant in ancient Maya drug containers for the first time.
Mexican marigold is classed as a culinary herb, and is non-toxic to humans.
Is Mexican marigold poisonous?
A little-known fact about marigolds is that they are poisonous. Their flowering head, stem, leaves and roots contain phototoxic thiophene derivatives. However, this poison actually has very little effect on humans.

