we would like to share with you a very recent publication from our group, where we have developed an NMR-based metabolomics tool, that could be very useful for urine studies.
If you want to read the full publication please read:
Deconvoluting interrelationships between concentrations and chemical shifts in urine provides a powerful analysis tool,
Takis, P.G., Schaefer H., Spraul, M., and Luchinat C., Nat. Commun., 8, (2017), doi:10.1038/s41467-017-01587-0.