Table 2.

Fasting bile acid concentrations, µmol l⁻¹, mean (s.d.)

	Lean	Obese pre-RYGB	P-valuea	40 weeks post-RYGB	P-valueb
Total bile acids	2.3 (1.7)	1.1 (0.66)	0.14	1.9 (1.5)	0.31
Conjugated bile acids	1.4 (1.1)	0.56 (0.35)	0.14	1.4 (1.5)	0.33
Glycine-conjugated bile acids	1.3 (1.1)	0.52 (0.34)	0.16	1.3 (1.4)	0.32
Taurine-conjugated bile acids	0.11 (0.07)	0.04 (0.02)	<0.05	0.08 (0.11)	0.48
Unconjugated bile acids	0.93 (0.59)	0.50 (0.34)	0.17	0.52 (0.33)	0.75

^aLean vs obese.

^bPre-RYGB vs post-RYGB.