Estimated maximal percent of daily reference intake (DRI) of B vitamins that could be provided by the gut microbiota

Range Table - link
Organism Human Homo sapiens
Reference Rowland I et al., Gut microbiota functions: metabolism of nutrients and other food components. Eur J Nutr. 2017 Apr 9. doi: 10.1007/s00394-017-1445-8. p.7 table 1PubMed ID28393285
Primary Source [56] Magnúsdóttir S, Ravcheev D, de Crécy-Lagard V, Thiele I (2015) Systematic genome assessment of B-vitamin biosynthesis suggests co-operation among gut microbes. Front Genet 6: 148 doi: 10.3389/fgene.2015.00148.PubMed ID25941533
Method P.7 right column bottom paragraph: "The authors estimated the percentage of human daily reference intake of each vitamin obtained from the gut bacteria [primary source]. Of the eight studied, without considering bacterial utilization, the gut microbiota were estimated to contribute over a quarter of the suggested dietary intake for four vitamins (Table 1, [primary source]). In addition, there is evidence from studies using a various human and animal colon preparations that the colonic epithelium can absorb a range of B vitamins, including folate, riboflavin, biotin, niacin and thiamine, via specific carrier-mediated mechanisms [ref 57]."
Comments P.11 left column 2nd paragraph: "In Table 1, organisms identified as participating in these reactions are shown. It should also be noted that these phenylacetic- and hydroxyphenyl-acetic acids can also be derived from fermentation of aromatic amino acids ([ref 45], see “Protein” section)." See notes beneath table
Entered by Uri M
ID 113402