They may even fluctuate depending on season, weather, soil, time of day, etc.
So, it's quite important to know something about the herbs, spices, fruits, berries, etc. that you use to make flavoured schnapps - or put in your food, juice, tea, drink, etc.
Or use for other purposes.
If you are uncertain you may find the answers in herb dictionaries, floras or local field guides, plant encyclopedias or other professional botanical books.
Look it up under the plants' botanical (scientific) names to be sure you find exactly what you are looking for.