Thomas et al. 2024 — Lead poisoning from Ayurvedic herbal diabetes capsule, Kerala
This case report describes a 58-year-old female who presented with generalized tiredness, decreased food intake, and abdominal pain. Peripheral blood smear showed basophilic stippling and ring sideroblasts, leading to investigation for heavy metal exposure. Blood lead was 121.20 µg/dL (reference: <25 µg/dL) and random urine lead was 400.2 µg/dL (reference: <80 µg/dL). The patient had been taking Sheopal’s Herbal Diabetes Care Capsule — an Ayurvedic supplement purchased via the internet — for 1.5 months prior to presentation. The capsule was submitted for analysis, revealing lead content of 40,657 ppm (40,657 µg/g), compared to the permissible limit of 10 ppm per the Ayurvedic Pharmacopoeia of India. The patient was treated with BAL followed by d-penicillamine oral chelation for 6 weeks, with normalization of blood and urine lead levels.
Key numbers
- Blood lead on admission: 121.20 µg/dL (reference <25 µg/dL)
- Random urine lead: 400.2 µg/dL (reference <80 µg/dL)
- Lead concentration in herbal capsule: 40,657 ppm (40,657 µg/g)
- Permissible limit per API (Ayurvedic Pharmacopoeia of India): 10 ppm
- Exposure factor: capsule Pb approximately 4,066× above permissible API limit
- Duration of exposure: approximately 1.5 months of daily supplement use
- Treatment: BAL (dimercaprol) then d-penicillamine oral chelation × 6 weeks; Hb improved to 10.1 g/dL at discharge
Methods (brief)
Clinical case report. Blood and urine lead measured by standard clinical laboratory methods. Herbal capsule sample submitted to the state drug analyst for lead determination. ICP or AAS method for capsule analysis not specified in the text.
Limitation: Evidence tier B (single case report; n=1). No ICP-MS speciation; total Pb only. Supplement was procured from an unregulated internet marketplace. Capsule identity not independently verified beyond patient report. Case from a single tertiary care center in Kerala, India.
Implications
Certification: Direct evidence that unregulated Ayurvedic dietary supplements can contain lead at levels thousands of times above permissible limits. Supports the case for heavy metal testing requirements for dietary supplements, herbal extracts, and traditional medicine products. The 40,657 ppm finding (4,066× API limit) illustrates that the risk is not marginal but catastrophic in the absence of testing.
Courses: Strong pedagogical case for why dietary supplement heavy metal testing matters. The patient believed herbal remedies were “safe” and “natural” — a documented false-belief pattern that led to clinical lead poisoning. The supplement was freely available online without prescription.
App: Limited direct data for app ingredient profiles (no population-level concentration statistics). Provides rationale for elevated Pb risk flag on Ayurvedic supplement ingredient types.