Table 1.

Metabolites tested to for their support of L. rhamnosus growth in KBM.

Compound name	Experimental concentration	Company
Citric acid	5 mM	Roth
Carnitine	5 mM	Sigma
Gamma-glutamyl-alanine	5 mM	Sigma
Xanthine	0.05 mM	Sigma
3-methyl-2-oxovalerate	5 mM	Sigma
3-methyl-2-oxobutyrate	5 mM	Sigma
Non-Essential Amino Acids + L-Glutamine	1 mM	Gibco
Fructose	1 mM	Sigma
Nicotinamide	0.001 mM	Fluka
N-acetyl-glucosamine	1 mM	Sigma
Carnosine	5 mM	Sigma