Leucovorin was originally marketed and the New Drug Application (NDA) is held by the global biopharma company GlaxoSmithKline (GSK). GSK marketed leucovorin under the brand name Wellcovorin from 1983 to 1997 but stopped manufacturing and marketing it since then. Currently, leucovorin is available in the U.S. as a generic drug made by multiple companies, not specifically owned or marketed by GSK anymore. Regarding Dr. Oz, he has financial ties to iHerb, a retailer that sells folinic acid (an ingredient in leucovorin), but he does not own leucovorin. He has stated intentions to divest his shares in iHerb. The FDA approval of leucovorin as a prescription drug is separate from the over-the- counter products sold by retailers like iHerb, so Dr. Oz is not considered an owner or direct beneficiary of leucovorin itself. In summary:
- Leucovorin's NDA holder is GSK, but it is available mostly as generics now.
- Dr. Oz does not own leucovorin but has financial ties to a company selling a folinic acid supplement.
This information is based on recent FDA actions and statements from GSK and the Department of Health and Human Services in 2025.
