Table 3.

Intracellular vitamin concentrations in selected gut microbes.

Vitamin	Organism	Reported value	References
Biotin	E. coli	40 μM	Cicmanec and Lichstein, 1978
Cobalamin	Lactobacillus reuteri CE	50 μg/L	Taranto et al., 2003
Flavin	E. coli	4 μM	Wilson and Pardee, 1962
Folate derivatives	Lactobacillus casei	22 μM	Shane and Stokstad, 1976
Niacin	E. coli	1.12 * 106 molecules in a single cell	McLaren et al., 1973
Pantothenate	E. coli	<1 μM	Jackowski and Alix, 1990
Pyridoxine	E. coli	1.5 * 10−10 mol h−1 mgDW−1	Dempsey, 1971
Thiamine	Lactobacillus fermenti	3 μg/gDW	Sompolinsky and Neujahr, 1971