Protein intake and phenolic metabolites.

<p>Influence of a high vs. low protein diet on change in plasma level and 24h urinary excretion of phenolic metabolites.</p

Protein intake and urea.

<p>Influence of a high vs. low protein diet on change in plasma urea and 24h urinary excretion of urea.</p

Protein intake and tryptophan metabolites.

<p>Influence of a high vs. low protein diet on change in plasma level and 24h urinary excretion of tryptophan metabolites.</p

UPLC-MS/MS operating conditions.

<p>Abbreviations: UPLC-MS/MS, ultra-performance liquid chromatography—tandem mass spectrometry; m/z, mass-to-charge ratio; CE, collision energy; RF, radiofrequency; BN, basic negative; AN, acidic negative; AP, acidic positive</p><p>UPLC-MS/MS operating conditions.</p

Protein intake and metabolites in mice.

<p>Influence of high protein vs. control diet on plasma level of tryptophan and phenolic metabolites in mice.</p