(U)HPLC, (ultra) high performance liquid chromatography; 1-AG, 1-arachidonoyl glycerol; 2-AG, 2-arachidonoyl glycerol; 2-Arachidonoyl glycerol; AEA, arachidonoyl ethanolamide; Anandamide; BMI, body mass index; Blood sampling; CBR, cannabinoid receptor; EC-like, endocannabinoid-like; ECS, endocannabinoid system; ECs, endocannabinoids; EDTA, ethylenediaminetetraacetic acid; Endocannabinoid; FAAH, fatty acid amide hydrolase; FT, freezing temperature; FTC, freeze­thaw cycles; HDL, high density lipo protein; KSCN, potassium thiocyanate; LLE, liquid­liquid extraction; MAGL, monoacylglycerol lipase; MS/MS, tandem mass spectrometry; O-AEA, virodhamine; OEA, oleoyl ethanolamide; PAF, platelet-activating factor; PEA, palmitoyl ethanolamide; PMSF, phenylmethylsulfonyl fluoride; Pre-analytics; RT, room temperature; SPE, solid-phase extraction; WB, whole blood