Ashwagandha toxicity
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Ashwagandha Toxicity: Liver Injury and Safety Concerns
Ashwagandha-Induced Liver Toxicity: Clinical Evidence
Several case reports and clinical series have documented that ashwagandha (Withania somnifera) can cause liver injury, often presenting as cholestatic or mixed hepatitis with symptoms such as jaundice, pruritus (itching), and abdominal pain. These symptoms typically appear 2 to 12 weeks after starting ashwagandha supplements and are characterized by elevated liver enzymes and bilirubin levels. Most cases resolve after stopping ashwagandha, but the recovery can be prolonged, and in rare instances, severe outcomes like acute-on-chronic liver failure and death have been reported, especially in patients with pre-existing liver disease 1356+2 MORE.
Patterns and Severity of Liver Injury
The majority of reported cases show a self-limiting course, with liver function returning to normal after discontinuation of ashwagandha. However, some patients experience prolonged jaundice and, in rare cases, progression to chronic liver injury or acute liver failure. Liver biopsies in these cases often reveal cholestatic hepatitis with hepatocellular necrosis and portal inflammation 1367+1 MORE. Notably, the risk of severe outcomes is higher in individuals with underlying liver conditions .
Mechanisms of Toxicity
Research suggests that withanolides, particularly withanone, are the active compounds in ashwagandha responsible for its medicinal effects and potential toxicity. Withanone can form adducts with DNA, leading to DNA damage, especially when the body’s detoxification capacity (such as glutathione levels) is compromised. This mechanism may explain the observed liver toxicity in some individuals .
Animal Studies on Ashwagandha Safety
Animal studies using ashwagandha root extract in rats have generally shown a high margin of safety, with no observed adverse effects at doses much higher than typical human consumption, even after repeated administration for up to 90 days. No significant changes in clinical signs, blood biochemistry, or organ histology were observed in these studies 24. However, these findings in animals may not fully predict rare toxic reactions in humans.
Other Toxicity Considerations
While ashwagandha has demonstrated protective effects against certain toxic insults, such as lead-induced toxicity in experimental models, these benefits do not negate the potential for rare but serious adverse effects like liver injury in susceptible individuals .
Conclusion
Ashwagandha is widely used and generally considered safe, but there is clear evidence that it can cause liver injury in rare cases, particularly presenting as cholestatic hepatitis with jaundice. Most cases resolve after stopping the supplement, but severe and even fatal outcomes have been reported, especially in those with pre-existing liver disease. The mechanism may involve DNA damage from withanolides. Animal studies suggest a high safety margin, but human case reports highlight the need for caution. Patients and healthcare providers should be aware of the potential for liver toxicity and consider supplement use in the evaluation of unexplained liver injury 1356+3 MORE.
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