A growing share of the drug-induced liver injuries treated at hospitals in the United States is being traced not to prescription medications but to herbal and dietary supplements marketed as natural alternatives. Researchers tracking these cases say the shift reflects both the popularity of supplements sold for weight loss, energy, muscle building and joint pain, and the absence of the premarket safety testing that prescription drugs must clear before ever reaching a shelf.
How supplement-related cases are showing up in injury registries
Networks that track drug-induced liver injury in the United States have recorded a parallel rise in cases tied to herbal and dietary products alongside the broader trend in medication-related liver harm, according to case-report literature on the subject. Unlike a prescription drug, where a suspected reaction can usually be traced to a single known active ingredient, a supplement implicated in liver injury often turns out to contain several botanical extracts at once, sometimes at concentrations that vary from bottle to bottle, which makes pinpointing the exact culprit substantially harder for clinicians reviewing a case after the fact.
Which ingredients draw the most scrutiny
Case reports and injury registries have repeatedly flagged a recurring set of ingredients in liver-related hospitalizations, including green tea extract, turmeric and curcumin formulations, garcinia cambogia, and ashwagandha, all of which are widely sold as joint, weight-loss, or stress-relief aids. Their presence in case reports does not mean every user faces a high risk, since liver injury from these products appears to affect a small subset of people, but it does mean physicians increasingly ask about supplement use when a patient presents with unexplained liver enzyme abnormalities, jaundice, or fatigue that does not fit an obvious cause. Several of these ingredients are sold under dozens of different brand names and in combination products, which can make it difficult for a patient to even recognize that two different supplements sitting in a medicine cabinet share the same underlying active compound. A case series published in PMC describes exactly this pattern, documenting a hospitalization in which an over-the-counter supplement, rather than any prescription drug the patient was taking, emerged as the leading suspect once other causes had been ruled out.
Why herbal doesn’t mean automatically safe
A product’s origin as a plant extract carries no guarantee of a benign safety profile, since concentrated extracts can deliver doses of active compounds far higher than what a person would consume by eating the plant itself. Contamination and inconsistent labeling compound the problem: independent testing of herbal products has repeatedly found ingredients not listed on the label, concentrations that differ sharply from what the packaging claims, and, in some cases, contamination with heavy metals or undisclosed pharmaceutical compounds picked up somewhere along an unregulated supply chain, a dynamic reporting on the underlying gastroenterology research has tied directly to the rise in supplement-linked liver failure cases.
The regulatory gap that lets these products reach shelves
Under the federal framework governing dietary supplements, manufacturers do not need Food and Drug Administration approval before selling a product, and the agency’s authority to intervene generally only kicks in after a supplement is already linked to reported harm. That after-the-fact structure means a product can remain on store shelves and e-commerce marketplaces for months or years while evidence of liver toxicity accumulates in case reports, and removal typically depends on voluntary recalls or FDA warning letters rather than the rigorous premarket trials that prescription and over-the-counter drugs undergo before they are ever sold to the public.
Why the injuries are often hard to catch early
Drug-induced liver injury from a supplement frequently develops slowly and without dramatic early symptoms, which means many patients keep taking the product for weeks after subtle liver damage has already begun. Because supplements are often perceived as low-risk, patients may not report them to a doctor at all during a routine visit, and clinicians reviewing a new liver-enzyme abnormality may not think to ask about weight-loss powders, energy blends, or joint supplements unless the case specifically prompts that line of questioning. That gap between exposure and detection is one reason researchers describe supplement-related liver injury as likely undercounted relative to the true number of cases occurring nationwide, since a case that resolves after a patient quietly stops a supplement on their own initiative may never be formally logged as a drug-induced liver injury at all.
Symptoms that signal a liver problem, not just fatigue
Yellowing of the skin or eyes, dark urine, pale stools, unusual fatigue, loss of appetite, and pain in the upper right abdomen are among the signs clinicians associate with drug-induced liver injury, whether the cause turns out to be a prescription medication or a supplement. Because many people do not think to mention over-the-counter products when a doctor asks about medications, physicians increasingly recommend that patients list every supplement they take, including ones bought online or recommended informally, so that a liver problem can be traced back to its source rather than dismissed as unrelated to anything the patient is taking.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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