herbal-extracts
Herbal extracts are concentrated preparations derived from plant material through solvents such as ethanol, water, or oil, isolating bioactive compounds like phenolics, flavonoids, and essential oils. In plant science, studying these extracts helps researchers identify and characterize the secondary metabolites that plants produce as part of their defense, signaling, and ecological strategies. Understanding the chemistry of herbal extracts also bridges fundamental plant biology with applications in pharmacology, agriculture, and food science.
open_in_new WikipediaPubMed · 2026-04-30
Researchers compared the chemical profiles of essential oils and hydrosols — the aromatic water left over after steam distillation — from seven common herb species in the mint family. They found that hydrosols are chemically distinct from essential oils, carrying more water-friendly aromatic compounds that make them useful ingredients in their own right.
Hydrosols from all seven herb species showed a higher relative proportion of polar, water-soluble oxygenated compounds (such as alcohols and oxides) compared to their matched essential oils.
Essential oils were dominated by less polar, highly volatile compounds including monoterpene hydrocarbons and certain esters and ketones — categories less prominent in hydrosols.
Across all seven Lamiaceae species tested — including lavender, peppermint, oregano, and three sage varieties — oxygenated monoterpenes were the dominant chemical class in both distillation products.
