White mustard extract

White mustard extract is a complex botanical preparation derived from the seeds of Sinapis alba, a member of the Brassicaceae family. It is not a discrete molecular target such as a receptor or enzyme, but rather a mixture of bioactive compounds, primarily the glucosinolate sinalbin and the enzyme myrosinase (European Medicines Agency). When the seeds are crushed in the presence of water, myrosinase catalyzes the hydrolysis of sinalbin into p-hydroxybenzyl isothiocyanate, which is responsible for the extract's characteristic pungency and its pharmacological effects (PubChem). Historically, the extract has been used topically as a rubefacient to stimulate local blood flow and alleviate musculoskeletal pain, and internally as a digestive aid to treat dyspepsia (American Botanical Council). Modern research has explored its potential in cancer chemoprevention, where its isothiocyanate derivatives may induce protective antioxidant enzymes and inhibit tumor cell proliferation (Phytochemistry Reviews). Because it consists of multiple chemical entities that interact with various biological pathways, it is classified as a therapeutic agent or phytochemical source rather than a specific therapeutic target.

Other names

Sinapis alba extractYellow mustard extractBrassica alba extractSemen erucae

The extract functions through the enzymatic conversion of the glucosinolate sinalbin into p-hydroxybenzyl isothiocyanate by the enzyme myrosinase upon seed maceration (PubChem). This isothiocyanate acts as a mild irritant to mucous membranes and skin, likely through the activation of TRPA1 channels, which induces local vasodilation (rubefacient effect) (Nature Reviews Drug Discovery). Furthermore, the constituent isothiocyanates are known to modulate the Nrf2-Keap1 pathway, leading to the induction of Phase II detoxification enzymes and the inhibition of pro-inflammatory cytokines via the NF-κB pathway (PubMed; Journal of Agricultural and Food Chemistry).