Benefits
Liver function markers (bilirubin and liver enzymes)
In a single trial, 33 people with acute viral hepatitis took 375 mg of kutki root powder three times a day or placebo for 2 weeks. Bilirubin and liver enzyme changes differed significantly, and bilirubin fell to 2.5 mg% in about 27 days on kutki versus about 76 days on placebo. It is small, old and done in people with a diagnosed infection, who need medical care.
Liver fat in animal studies
No controlled human trial has tested kutki alone for liver fat. In rats with chemically injured livers, kutki lowered liver fat and liver enzymes, and in mice on a high-fat diet an extract lowered cholesterol, triglycerides, liver weight and liver enzymes. A review proposes testing kutki for fatty liver in people; that work has not yet been reported.
Immune response markers
In rats and mice, kutki extracts raised antibody responses and the activity of immune cells that engulf germs. In a trial of a proprietary kutki extract, AEV01, given with standard care to 70 adults over 50 with mild COVID-19, recovery was faster and markers such as TNF-alpha, IL-6 and CD4 counts improved. It does not show that kutki prevents or treats any infection.
Inflammation signaling in laboratory studies
In immune cells grown in the lab, kutki extract blocked NF-kB activation and lowered COX-2 and iNOS, and in rats it reduced paw swelling and inflammatory cytokines such as IL-1 beta, IL-6 and TNF-alpha. No trial has tested whether kutki itself reduces inflammation in people.
Bile flow
Kutki is traditionally used as a bitter for digestion and bile flow. Picroliv increased bile flow in rats and countered drug-induced bile stasis in rats, guinea pigs and cats. None of the cited studies measured bile flow in people. What people most often notice is the gut effect: traditional preparations can loosen stools.
Mechanism of action
Liver cell protection in animal models
In rodents given galactosamine, paracetamol, thioacetamide or carbon tetrachloride, picroliv protected the liver about as well as silymarin from milk thistle. This is animal work and has not been shown in people.
Antioxidant enzymes
In animal studies, kutki extracts restored antioxidant enzymes such as catalase, glutathione peroxidase and superoxide dismutase after chemical injury. These measurements come from animal tissue, not from people.
Bile flow
Picroliv increased bile flow in rats and reduced drug-induced bile stasis in several animal species. Whether this affects cholesterol or anything else in humans has not been tested in the studies cited here.
NF-κB and inflammatory pathway inhibition
In cultured immune cells, kutki extract blocked NF-kB activation by inhibiting IkB kinase phosphorylation and lowered COX-2 and iNOS. In rats it lowered IL-1 beta, IL-6 and TNF-alpha. These effects have not been confirmed in people.
Clinical trials
Randomized, double-blind, placebo-controlled trial: 375 mg kutki root powder (standardized for picrosides) three times a day or placebo for 2 weeks; the paper also reports a rat liver-injury experiment (Vaidya et al. 1996, Journal of Postgraduate Medicine)
33 patients with acute viral hepatitis who were negative for hepatitis B surface antigen (15 kutki, 18 placebo).
Bilirubin, SGOT and SGPT changes differed significantly between groups. Bilirubin took about 27 days to fall to 2.5 mg% on kutki versus about 76 days on placebo. Small, single trial in people with a diagnosed liver infection.
Randomized, double-blind, placebo-controlled, multicenter phase 3 trial: AEV01, a patented kutki extract, 100 mg three times a day or placebo for 30 days, both added to standard care (Balan et al. 2024, Journal of Ayurveda and Integrative Medicine)
70 adults over 50 with mild COVID-19.
Time to recovery was 4.5 days on AEV01 versus 9.1 days on placebo, with improvements in oxygen saturation, cough and markers such as ESR, LDH, ferritin, TNF-alpha, IL-6 and CD4 counts. One proprietary extract in patients who also received medical treatment; two of the seven authors are from Astrel Genome Ltd.