Yellow oleander-adulterated weight-loss supplements
Toxins · Botanical adulterant / cardiac glycoside
Critical exposure concern
Bottom line
Read Off Label rates Yellow oleander-adulterated weight-loss supplements a CRITICAL exposure concern (8.6/10) based on strong evidence of high acute hazard where substituted/adulterated harm magnitude and high acute exposure prevalence.
FDA updated the safety alert on March 11, 2026 after adding another product found to contain toxic yellow oleander.
This entry describes an exposure rather than an added intervention.
What the evidence says
FDA updated the safety alert on March 11, 2026 after adding another product found to contain toxic yellow oleander. The issue is substitution/adulteration: products labeled as tejocote root or Brazil seed may actually contain Thevetia peruviana. This is a high-signal toxin row because it sits at the intersection of weight-loss supplements and acute cardiac-glycoside poisoning.
Mechanism
Yellow oleander (Thevetia peruviana) contains cardiac glycosides that can disrupt cardiac conduction and trigger severe GI, neurologic, and cardiovascular toxicity.
Reported exposure / mitigation context
FDA alerts have identified yellow-oleander adulteration in some tejocote or Brazil-seed weight-loss products; ingestion can cause cardiac-glycoside toxicity
Citations
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Common questions
- How harmful is Yellow oleander-adulterated weight-loss supplements?
- Yellow oleander-adulterated weight-loss supplements is rated CRITICAL exposure concern (8.6/10) on the Read Off Label scale, derived from strong evidence of high acute hazard where substituted/adulterated harm magnitude and high acute exposure prevalence.
- How does Yellow oleander-adulterated weight-loss supplements cause harm?
- Yellow oleander (Thevetia peruviana) contains cardiac glycosides that can disrupt cardiac conduction and trigger severe GI, neurologic, and cardiovascular toxicity.
- What exposure context is reported for Yellow oleander-adulterated weight-loss supplements?
- FDA updated the safety alert on March 11, 2026 after adding another product found to contain toxic yellow oleander.
This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.