Table 2 The internal standard used in this study

Free fatty acid

FFA

FFA(18:2)-d11

0.2

Acylcarnitine

CAR

CAR(16:0)-d3

0.2

Eicosanoids

Eicosanoid

5S-HETE-d8

0.04

Cholesterol

Cho

Cho-d7

5

Cholesteryl ester

CE

CE(18:1)-d7

2

Bile Acid

BA

GCDCA-d4

0.04

Sphingosine

SPH

SPH(18:1)-d7

0.04

Ceramide

Cer

Cer(d18:1(d7)/18:0)

0.2

Ceramide 1-phosphates

CerP

CerP(d18:1/8:0)

0.4

Hexosylceramide

HexCer

HexCer(d18:1(d5)/18:0)

0.4

Sphingomyelin

SM

SM(d18:1(d9)/15:0)

0.2

Diacylglycerol

DG

DG(17:0/17:0)_d5

0.2

Triacylglycerol

TG

TG(17:0/17:1/17:0)_d5

0.2

Lysophophatidylcholine

LPC

LPC(16:0)-d31

0.2

alkyl-Lysophophatidylcholine

LPC-O

LPC(16:0)-d31

0.2

Lysophosphatidylethanolamine

LPE

LPE(14:0)

0.2

alkenyl-Lysophosphatidylethanolamine

LPE-P

LPE(14:0)

0.2

Lysophosphatidylglycerol

LPG

LPG(14:0)

0.2

Lysophosphatidylinositol

LPI

LPI(17:1)

0.2

Lysophosphatidylserine

LPS

LPS(17:1)

0.2

Phosphatidylcholine

PC

PC(16:0(d31)/18:1)

0.2

alkyl-glycerophosphocholines

PC-O

PC(16:0(d31)/18:1)

0.2

Phosphatidylethanolamine

PE

PE(16:0(d31)/18:1)

0.2

alkenyl-glycerophosphoethanolamines

PE-P

PE(16:0(d31)/18:1)

0.2

Phosphatidylglycerol

PG

PG(16:0(d31)/18:1)

0.4

Phosphatidylinositol

PI

PI(16:0(d31)/18:1)

0.2

Phosphatidylserine

PS

PS(16:0(d31)/18:1)

0.4

Coenzyme Q

CoQ

CoQ10-d9

0.4