Guduchi, better known in much of India as giloy, is a climbing vine that Ayurveda treats with great respect. Its Sanskrit name, amrita, means “nectar” or “that which gives immortality”, and its fame grew sharply in recent years when it was promoted as an immune booster. The traditional story is rich. The modern safety story, however, deserves to be read first.
LiverTox, the US National Institutes of Health reference on liver injury from medicines and supplements, rates guduchi at its highest level of certainty as a cause of liver injury. Please read the next section before the rest of the page.
Liver injury: what the reports show
LiverTox, in its monograph on Tinospora (guduchi), reports more than 50 cases of clinically apparent acute liver injury since 2017, many of them during the COVID-19 pandemic, when guduchi was being promoted as a way to boost immunity. Most were from India and Thailand, and there were single cases in Germany, Belgium, France and the United States.
The reported injury was typically hepatocellular, meaning it affected the liver cells themselves. It began from a few weeks to about six months after starting the herb. Autoantibodies were common, and biopsies often showed features of autoimmune liver disease. Several cases were fatal, most often in people who already had liver disease. In most others the liver recovered after the herb was stopped. The mechanism is not known, but it is thought to be immune mediated.
LiverTox gives guduchi a likelihood score of A, which is its category for a well-established cause of clinically apparent liver injury. That is the strongest rating the scheme has.
What this means in practice:
- Guduchi is not a harmless tonic. The reports involve capsules, tablets, juices and decoctions marketed for health.
- People with existing liver disease are the group at greatest risk of a bad outcome, and should avoid it unless a hepatologist agrees.
- Tiredness, nausea, poor appetite, dark urine or yellowing of the skin or eyes while using guduchi are reasons to stop and seek medical care promptly. These are the usual warning signs of liver trouble in general.
- Tell your doctor if you have used guduchi when you are given liver tests, since it may explain unexpected results.
What it is
Guduchi is Tinospora cordifolia, a climbing plant with heart-shaped leaves and a fleshy green stem that twines up trees. In Sanskrit it is guduchi, amrita and also chinnodbhava, in Hindi it is giloy, and in English it is heart-leaved moonseed or Indian tinospora. The part used is chiefly the stem, with the root and leaves used less often.
LiverTox also mentions a mislabelling problem. A related species, Tinospora crispa, is sometimes confused with it in products, so a label that says only “Tinospora” or “giloy” does not tell you exactly what is inside.
The traditional view
Later materia medica such as the Bhavaprakasha describes guduchi in detail, and the Charaka Samhita and other classical works use the plant in many formulas. The commonly taught profile is bitter and astringent in taste, sweet in post-digestive effect (vipaka) and heating in potency (virya). Here the sources do differ: some teachers call its potency heating, others treat the whole plant as balancing, so you will find both statements.
On the doshas, guduchi is usually called tridoshic, a plant said to calm all three, with its strongest reputation being the soothing of pitta. Our pages on pitta, vata and kapha explain the three principles.
Tradition describes guduchi as a rasayana, a substance for long-term nourishment of the tissues, and links it with the digestive fire (see our page on agni) and with a general sense of resilience. Those are traditional descriptions. They are not claims that guduchi treats or prevents any illness, and the safety record above is a good reason to read them with caution.
How it is traditionally prepared
Guduchi is not a culinary herb. Traditional forms include a cold infusion of the stem, a decoction, a starch-like extract called guduchi satva and various medicated formulas. We are not giving instructions or amounts. The recent injury reports involve exactly the kind of home and market preparations that people try on their own, and any use should come from a registered practitioner who can assess the person’s liver health first. Our method page explains why this site draws a hard line around preparations.
What research says
According to LiverTox, guduchi has been used in Ayurveda for many conditions, but the activities seen in animal studies have not been shown in humans. We are not going to repeat claims of immune boosting or of other benefits, because we found no support for them in the sources we checked. NCCIH has no page on guduchi, and describes research on Ayurvedic treatments generally as limited, with small and sometimes poorly designed trials.
Side effects listed as uncommon by LiverTox include headache, dizziness, nausea, abdominal discomfort, diarrhoea and rash.
Safety and interactions
- Liver. Well established cause of liver injury, with fatal cases. See the first section. Avoid with existing liver disease.
- Pregnancy and breastfeeding. The sources we checked do not cover this, so we cannot confirm safety. Given the liver reports, please speak to a doctor before using any guduchi product at all.
- Children. Not covered by our sources. Ask a paediatrician, and do not give guduchi products to a child on your own judgement.
- Autoimmune conditions. LiverTox describes autoimmune features in the injury cases and an immune-mediated mechanism. We found no source that covers guduchi for people with autoimmune disease, so those people should ask their specialist before any use.
- Medicines. NCCIH notes that most herb-drug interactions in current sources are hypothetical and that narrow-margin medicines such as warfarin, digoxin and chemotherapy call for the most care. It does not name guduchi. Any medicine that itself affects the liver is a reason to ask a doctor or pharmacist before adding guduchi.
- Surgery. Tell your surgical team about any herbal product before an operation.
- Kidney and allergies. No source we checked covers these. Please ask a doctor if either applies.
- Contamination and labelling. NCCIH warns that some Ayurvedic preparations may contain lead, mercury or arsenic at toxic levels. Combined with the Tinospora mislabelling noted above, a product may not contain what it says.
Guduchi and neem are often sold together as “immunity” products. For neem, see our neem page, where the oil carries its own serious warning.
This page is education, not medical advice. Please read our medical disclaimer, see a doctor for any health concern, especially yellowing of the skin or dark urine, and a registered Ayurvedic practitioner (BAMS in India) for any Ayurvedic treatment.
Frequently asked questions
↳ Can giloy damage the liver?
Yes, there are reports of it. LiverTox describes more than 50 cases of clinically apparent acute liver injury since 2017, including several fatal ones, and scores guduchi A, meaning a well-established cause. Most people recovered after stopping.
↳ Is guduchi the same as giloy?
Yes. Guduchi is the Sanskrit name and giloy is the Hindi name for Tinospora cordifolia. A related plant, Tinospora crispa, is sometimes mixed up with it in products, so labels matter.
↳ Does giloy boost immunity?
Tradition calls it a rasayana, but LiverTox states that the activities seen in animal studies have not been shown in humans. Its promotion as an immune booster during the pandemic coincided with many of the liver injury reports.
↳ What are the warning signs of liver trouble?
Tiredness, nausea, poor appetite, dark urine and yellowing of the skin or eyes are the usual general signs of liver trouble. If any appear while using a herbal product, stop it and see a doctor promptly.
↳ Is guduchi safe for people with liver disease?
LiverTox notes that the fatal cases were most often in people who already had liver disease. Anyone with a liver condition should avoid guduchi unless their specialist has agreed.
Sources: LiverTox: Tinospora (guduchi), NCCIH: Ayurvedic medicine in depth, NCCIH: Herb-drug interactions.