Isolation of allithiamine from Hungarian red sweet pepper seed ( Capsicum annuum L. ).
Level 5 - mechanism / opinion, no new human data
Preclinical laboratory phytochemistry and animal model study
PubMed 30582034 · doi:10.1016/j.heliyon.2018.e00997
What was done
Researchers developed extraction (96% ethanol solid-liquid extraction followed by C18 solid-phase extraction) and chemical synthesis methods to obtain allithiamine from Hungarian red sweet pepper (*Capsicum annuum*) seeds. The compound structure was verified using reverse-phase HPLC, HPLC-MS, MALDI-TOF MS, and NMR. The functional effect of allithiamine on neuropathic pain was then evaluated in streptozotocin-induced diabetic mice, using benfothiamine as a comparator.
What was found
Allithiamine was confirmed as a constituent of sweet pepper seeds. In diabetic neuropathic mice, treatment with allithiamine improved neuropathic pain sensation with an efficacy reported as similar to benfothiamine. The abstract reports no numerical values, dosages, or statistical effect sizes.
Why it matters
This identifies sweet pepper seeds as the first non-*Allium* natural source of allithiamine and demonstrates preclinical proof-of-concept for its potential utility in diabetic neuropathy.
Limits
Findings are limited to animal and laboratory models and cannot establish clinical efficacy or safety in humans. The abstract does not state the number of animals tested, the treatment doses, or the specific quantitative outcomes of the pain assays.
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