Research finds association between plasma metabolites and COVID-19 antibody levels in recovered patients

A study led by Hong Kong Baptist University (HKBU) has revealed the association between rapidly fading antibody levels in some recovered COVID-19 patients and a high plasma concentration of a metabolite called glycylproline (gly-pro) and its producing enzyme.

source https://medicalxpress.com/news/2022-10-association-plasma-metabolites-covid-antibody.html