Table 5.

Biologically active constituents of fenugreek and their classifications.

Chemical Group	Compounds	References
Alkaloids	Trigonelline, choline, carpaine	Lee et al. (2005) Kaviarasan et al. (2007) Rababah et al. (2011)
Amino Acids	Lysine, histidine, 4-hydroxyisoleucine, tryptophan, tyrosine, cystine, arginine	Gupta et al. (2001) Ruby et al. (2005) El Nasri and El Tinay (2007)
Coumarins	Methyl coumarin, trigocumarin, trimethyl coumarin	Raju et al. (2001)
Flavonoids	Naringenin, lilyn, kaempferol, vecenin-1, tricin 7-O-D glucopyranoside, saponaretin, isovitexin, isoorientin. Orientin, vitexin, luteolin, quercetin	Blumenthal et al. (2000) Sauvare et al. (2000) Meghwal and Goswami (2012)
Saponins	Fenugrin, foenugracin, glycoside, yamogenin, trigonoesides, smilagenin, gitogenin, sarsasapogenin, yuccagenin, hederagin, diosgenin, tigonenin, neotigogenin	Gupta et al. (2001)
Others	Vitamin A, folic acid, ascorbic acid, thiamin, riboflavin, biotin, nicotinic acid, gum	Hamden et al. (2010) Chatterjee et al. (2010)