Gentian

Gentiana lutea · Gentian root

Snapshot

Indications	Contraindications
Loss of appetite¹ Mild dyspeptic disorders¹ Satiety and weight management² Daily energy intake³ Topical skin inflammation⁴	Hypersensitivity to gentian¹ Pregnancy or nursing⁵ Gastric or duodenal ulcers⁵

Gentian (Gentiana lutea) root is a bitter herb whose compounds act on bitter taste receptors in the gastrointestinal tract. The European Medicines Agency's herbal committee recognizes traditional use for temporary loss of appetite and mild dyspeptic disorders, based on long-standing use rather than trials¹. More recent work covers energy intake and weight control and topical skin inflammation.

A 2016 crossover study of a microencapsulated root extract in healthy adults found lower energy intake later in the day, without changes in appetite ratings³. A 2024 randomized trial of a gentian, chicory, and cinchona combination found greater weight loss and satiety than placebo in adults with overweight or obesity. Gentian violet, a synthetic dye unrelated to the root, shares the name in the literature; a 2021 computational network analysis proposed it as an Alzheimer's disease candidate, with no human trial⁶. Products listing gentian, 581 in US labels, are mostly liquid extracts with some capsules; see Form comparison.

The most consequential caution is misidentification: a 2008 case report described severe bradycardia and hypotension after a yellow gentian beverage found to contain Veratrum alkaloids⁷. Health Canada lists consulting a practitioner if symptoms persist or worsen⁸ and headache as a known reaction⁸.

Last updated October 16, 2026. Read how we make monographs.

In the full monograph

22 sources, 20 studies

When to useThe situations practitioners use it for, each with the reason and the study behind it.
SafetyWho should avoid it, who needs extra care, and the side effects reported in studies.
Protocol notesThe doses used in studies, how and when they were taken, and how the forms on the market compare.
How it worksWhat it is and how it works in the body, in plain terms.
Published studiesThe studies behind each use, popular claims checked against them, and trials still under way.
Word of mouthWhat patients and practitioners report online, kept separate from the clinical evidence.
Clinical perspectiveA closing read of where the evidence is solid, where it is thin, and what has not been studied.

Snapshot

In the full monograph

Sources