Giloy (Guduchi): what it does and what to watch
Also known as: Giloy, Guduchi, Tinospora cordifolia · Herbal supplement (immune-tonic tradition) · Updated 2026-08-20 · Educational — not medical advice
In plain language: This climbing shrub has long been used as a general tonic believed to support the body's natural defenses, and modern interest has focused on compounds that appear to stimulate immune cell activity in laboratory studies. Human clinical evidence remains limited and mostly small in scale. Importantly, the same immune-stimulating action that underlies its traditional reputation is also the reason it carries real caution: stimulating an already overactive immune system is not a neutral effect for everyone, and a number of case reports describe liver injury linked to its use.
What it's used for
- Traditionally taken to support recovery after fever or illness
- Used in traditional practice as a general immune tonic
- Marketed for overall wellness and vitality
Common side effects
- Constipation
- Upset stomach
- Dizziness
- Itching or mild skin irritation
Get medical help if…
Documented case reports of drug-induced liver injury, including jaundice and marked elevation of liver enzymes
Risk of overstimulating the immune system in people with autoimmune conditions, potentially worsening disease activity
Interaction with immunosuppressant medicines, potentially reducing their intended effect
Additive blood-sugar-lowering effect with diabetes medicines
Allergic reactions including rash
Lab values it can move
Few guides tell you this part: medicines show up in blood work. If you take Giloy (Guduchi) and a value below looks off on your report, this may be part of the story — never stop a medicine without your doctor.
Case reports link giloy use to marked liver enzyme elevation, sometimes appearing weeks after starting regular use.
SGPT (ALT)This liver enzyme has also been reported elevated alongside ALT in documented liver injury cases tied to this herb.
SGOT (AST)A blood-sugar-lowering effect has been reported, relevant for people on diabetes medicine tracking fasting glucose.
Fasting GlucoseGood to know
- People with autoimmune conditions such as lupus or rheumatoid arthritis should avoid this herb or use it only under close medical supervision, since it may stimulate immune activity
- Anyone taking immunosuppressant medicines should discuss this herb with their doctor, since it may work against the intended effect of the medicine
- Watch for and report symptoms such as yellowing skin or eyes, dark urine, unusual fatigue, or abdominal pain, which can signal liver injury
- People on diabetes medicine should monitor for low blood sugar symptoms
- Supplement quality and purity vary between products since these are not regulated with the same rigor as medicines
Questions people ask
Why is giloy linked to liver problems?
Several published case reports describe people developing liver injury, including jaundice and elevated liver enzymes, after taking giloy or guduchi supplements, with improvement after stopping. The exact reason isn't fully settled, but it appears in a minority of users rather than everyone, which is why symptoms like yellowing skin, dark urine, or unusual fatigue should prompt stopping the supplement and seeking medical advice.
Should someone with an autoimmune condition avoid this herb?
Generally, yes, without medical guidance. Giloy is believed to stimulate immune system activity, which is part of its traditional reputation as an immune tonic, but in someone whose immune system is already overactive, such as in lupus or rheumatoid arthritis, this stimulation could potentially worsen disease activity. A doctor familiar with the underlying condition should weigh in before use.
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