Carlson’s independently sourced account, verified against the raw fetched text of the HistoryNet article, records that LeBlanc “also published testimonials from folks who claimed the stuff had cured arthritis, cancer, and beriberi” (Carlson 2018). As with the broader disease-cure claim logged separately in this bundle, no clinical study of Hadacol supporting any of these three specific claims appears in any source here; the claim rests entirely on unsolicited testimonial and is logged as testimonial-grade and refuted, consistent with the FTC’s contemporaneous characterization of Hadacol’s marketing generally as “false, misleading and deceptive” (Time 1951).