At every place on the globe the mix of the stable isotopes is different. These isotope patterns can be used to identify the source of products. If the product contains water the geographical isotope pattern of the hydrogen and oxygen will enable the precise identification of the origin of the product. The isotope signatures nitrogen and sulfur reflect the soil where a product was grown. Each region has its own individual isotopic composition — a comparison per database can reveal whether the strawberries in the jam came from Queensland or Korea. Read more.