Which salsa ingredient makes it taste like dirt

ingredient-selectionsalsa

I suppose it could also be considered "earthy".

There is an ingredient that is often added to "authentic" salsas that often ends up making it taste too "earthy".

Which ingredient is it?
Is it cilantro?

My partner has a very sensitive "dirt-flavor" sense... One of the ingredients that may be found in salsa that often triggers it for her is cumin.