Is the Mustard-on-Broccoli Trick Actually Doing Anything for Your Health?
Ground brown mustard seed increased a sulforaphane-related urinary marker after cooked broccoli in a small trial, without proving a health benefit.
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Myrosinase
Myrosinase starts the breakdown of glucosinolates when plant tissue damage brings the enzyme into contact with these compounds.
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Myrosinase is an enzyme that starts the breakdown of glucosinolates, a group of plant compounds involved in chemical defense .1
In intact plant tissue, myrosinase and its substrate are normally kept apart. Tissue damage, such as chewing, brings them into contact. Myrosinase then initiates hydrolysis, a reaction that uses water to break a chemical bond .1
For example, when the substrate is glucoraphanin, myrosinase releases glucose and an unstable intermediate that can rearrange into sulforaphane or other products. Myrosinase, glucoraphanin, and sulforaphane therefore have distinct roles: enzyme, starting compound, and possible final product .1
References
- Yagishita Y, Fahey JW, Dinkova-Kostova AT, Kensler TW Broccoli or Sulforaphane: Is It the Source or Dose That Matters?. Molecules. 2019. About this source DOI
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