Effect of Organic Food Intake on Nitrogen Stable Isotopes.

ABSTRACT: Food choices affect the isotopic composition of the body with each food item leaving its distinct isotopic imprint. The common view is that the natural abundance of the stable isotopes of nitrogen (expressed as δ15N) is higher in animals than in plants that constitute our contemporary diets. Higher δ15N is thus increasingly viewed as a biomarker for meat and fish intake. Here we show that organic compared to conventional farming increases plant δ15N to an extent that can appreciably impact the performance of δ15N as a biomarker. The error that can arise when organic plants are consumed was modelled for the entire range of proportions of plant versus animal protein intake, and accounting for various intakes of organic and conventionally grown crops. This mass balance model allows the interp

SUBMITTER: Mantha OL 

PROVIDER: S-EPMC7601395 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature