Table 2.

Effects of protein on gut microbiota

	Microbial diversity	Bifidobacteria	Lactobacilli	Bacteroides	Alistipes	Bilophila	Clostridia	Roseburia	Eubacterium Rectale	References
Animal protein	↑	↑↓		↑↓	↑	↑	↑	↓	↑↓	[13, 29–35, 38–40]
Whey protein extract	↑	↑	↑	↓			↓			[32, 33]
Pea protein extract	↑	↑	↑							[31]

Arrow thickness corresponds to relative number of studies supporting the relationship