Table 1.

Phylogenetic and Functional Variation Between the Three Suggested Human Enterotypes

	Phylogenetic variation		Functional variation
	Main contributors	Co-occurring genus	Energy generation	Overrepresented vitamin
Enterotype 1	Bacteroides	Parabacteroides	Fermentation of carbohydrates and proteins	Biotin (vitamin B7)
Enterotype 2	Prevotella	Desulfovibrio	Degradation of mucin glycoproteins in mucosal layer	Thiamine (vitamin B1)
Enterotype 3	Ruminococcus (Sanger sequencing-based metagenomics) Clostridiales (Illumina sequencing-based metagenomics)	Akkermansia	Degradation of mucin	Heme (involved in vitamin B12 biosynthesis)

From: Arumugam et al., 2011.