grammatical number - Correct way?: most abundant 10 african and 10 european ingredients

Lets say I want to talk about the 10 ingredients most frequently found in each continent, while being as concise as possible. I have the choice to say 10 most abundant ingredients in african and european continents, but then it becomes unclear whether the 10 are the sum of both, or 10 in each, and how they are split. How would you say this?