The chart below shows five very well - studied glucosinolates, the best cruciferous vegetables for obtaining them, and some key isothiocyanates that form after the glucosinolates have been acted upon
by myrosinase enzymes:
In broccoli sprouts, its precursor, glucoraphanin, exists and is converted into sulforaphane
by myrosinase contained in broccoli itself and produced by microbes in the gut.
Not exact matches
Since
myrosinase and glucoraphanin are found in different parts of the plant, this change happens when the plant is damaged (
by chewing, blending, chopping, etc.) allowing the two compounds to mix and react.
By contrast, boiled radish sprout extracts (deactivating ESP) to which
myrosinase was subsequently added, induced similar QR activity to broccoli sprouts.
This process will allow
myrosinase enzymes to go to work prior to their deactivation
by cooking heats.
By the time they reach our bowels, the critters that live there take over for
myrosinase to produce sulforaphane from the more heat - stable glucosinolates.
Freshly harvested cruciferous vegetables not consumed in raw form, but chopped and allowed to sit for several minutes prior to cooking will typically have some of their glucosinolates converted into isothiocyanates
by still active
myrosinase enzymes, and these isothiocyanates will also be available for absorption in the upper digestive tract.
Freshly harvested cruciferous vegetables eaten in raw form will typically have a significant percentage of their glucosinolates converted into isothiocyanates
by still active
myrosinase enzymes and these isothiocyanates will become available in the upper digestive tract (small intestine) for absorption into the bloodstream.
(4, 5]-RRB- When kale is damaged via chopping or chewing, the enzyme
myrosinase helps release isothiocyanates
by interacting with glucosinolates.