Influence of saponin plants on the volatile fraction of thyme in herbal teas

The volatile fraction and the thymol content of herbal teas prepared from thyme (Thymus vulgaris L., Lamiaceae) mixed with cowslip (Primula veris/P. elatior) and liquorice roots (Glycyrrhiza glabra) were decreased with higher proportions of these saponin plants whereas the relative proportion of monoterpene hydrocarbons increased.