Table 5.

Summary of changes in the fecal SCFA profile in patients after BS

Surgery	Sample (n)	Time post-op (weeks/years)	Changes in SCFAs							Study
			Acetate	Propionate	Butyrate	Isobutyrate	Valerate	Isovalerate	Total SCFA
	26	1w	↓	↔	↔	↔	↔	↔	-	[70]
	26	3w	↓	↔	↔	↑	↔	↑	-	[70]
RYGB	14	4w	↓	↓	↓	-	↓	-	↓	[91]
	73	6w	↓	↓	↓	↑	↔	↑	↓	[74•]
	7	6w	↔	↔	↔	↑	↔	↑	↔	[93]
	9	12w	↔	↔	↔	↑	-	↑	-	[93]
	14	1w	↔	↔	↔	↔	↔	↔	-	[70]
SG	14	3w	↔	↔	↔	↔	↔	↔	-	[70]
	8	4w	↓	↓	↓	-	-	-	↓	[91]
	17	6w	↓	↓	↓	↑	-	↑	↓	[74•]
SG/BDP/bypass	6/2/1	4y	↓	↓	↓	-	-	-	-	[94]

“↑” – higher concentration vs before BS, “↓” – lower concentration vs before BS, “↔“ – no significant changes vs before BS, “-” – no data