Gentian

Harvesters dig gentian roots after the plant’s second year, when bitter compounds peak. Workers wash the roots, slice them thin, and air‑dry them in shaded barns to prevent oxidation. Dried material is milled into a fine powder, then immersed in food‑grade ethanol for several weeks. The solvent draws out amarogentin, gentiopicrin, and volatile terpenes. After maceration, the mixture passes through a vacuum filter, and the ethanol evaporates under reduced pressure, leaving a thick, amber‑brown absolute. Some houses apply super‑critical CO₂ at 300 bar to capture a lighter oil that retains fresh green notes while reducing solvent residues. Quality labs run gas‑chromatography to confirm amarogentin levels above 30 % and verify absence of heavy metals. The absolute yields roughly 0.5 % of the dry root weight, making it a premium ingredient. The final product stores in amber glass to shield it from light, preserving its bitter edge for formulation.