[Jed]: You know, when I give lectures to students, I frequently make, point out to them how they're
doing this glucoraphanin into sulforaphane conversion, so I will do it for this webinar.
When you chew on a red radish, you're familiar with the fact that the first sensation is
cool and crunchy and then within 20, 30 seconds, you develop heat, you start tearing, your
nose starts running, has a lachrymating effect.
So what you are doing is you're acting like that insect that I told you lands on a leaf
of a broccoli plant.
You're breaking the plant cells by crunching on the radish, you're releasing a compound
that's very, very similar to glucoraphanin.
It's actually called glucoraphenin in radishes.
It happens to be more of a lachrymator.
It's got a more mucus-inducing effect in people.
And you're letting myrosinase in those radish tissues act on glucoraphenin and form sulforaphene
and some other related isothiocyanates.
That's the broad name for that category.
So it happens that fast when you chew on fresh vegetables that contain this system.
[Rhonda]: Does sulforaphene also activate Nrf2?
[Jed]: It does, but to a lesser degree than sulforaphane.
[Rhonda]: So many of these isothiocyanates also activate Nrf2, but not to the same degree
as sulforaphane?
[Jed]: They do.
And just in case you're about to ask me, you find this system, it's been dubbed the mustard
oil bomb by some, 20 or 30 years ago.
You find this system almost exclusively in cruciferous vegetables, or brassica vegetables
or cole crops, they're sometimes called, depending upon where you come from, where you hail from.
In Eastern Europe, they typically call them cole crops.
So this happens to be a very large family of, I don't know, 500 or 600 genera, many,
many thousands of species.
[Rhonda]: Yeah, I know, like, maybe 10 of them.
[Jed]: Well, we know maybe 20, but, I mean, there are very many of them.
And they grow worldwide although the brassica or the cold crops that we're familiar with
in the United States are all temperate climate crops.
They're common to areas where there's a cold winter or a freeze in the winter.
There are some interesting relatives we can talk about later or now if you like which
are tropical.
Moringa is the one which has gotten most attention recently and we've been interested in for
about 20 years.
It's a relative of broccoli, but it's a tropical plant.
It's actually a tree.
And it, too, has this system of glucosinolate, myrosinase, and isothiocyanate.
The former being the storage form in the plant, the latter being the biologically active form.
[Rhonda]: Right, okay.
Yeah, maybe we can get to that little bit later, but talk a little bit more about the
sulforaphane in the broccoli sprouts.
I wanted to ask you something because you mentioned, it really piqued my attention,
as you said that broccoli seeds actually had higher amount of glucoraphanin than the sprout.
If I were to say take those broccolis, because I sprout, If I were to take those broccoli
seeds, add a little water and blend them in a blender, would that activate myrosinase
within the seed, the crushing of the seed?
[Jed]: You bet.
[Rhonda]: So I could actually get a higher, more potent amount of sulforaphane theoretically
if I were to just take the seeds and because...
Man, that would be easier than sprouting in a way.
[Jed]: Yes.
That's true.
So, interestingly when we discovered that, and this was published in 1997, so it's ancient
history.
It's probably before you were born, right?
So when we discovered that broccoli sprouts in seeds were such a potent source of sulforaphane
or its precursor, we weren't aware that anybody had eaten broccoli seeds.
People eat all sorts of seeds, poppy seeds and rapeseed or canola seed, in fact, are
used to express oil and they're a close relative.
But no one had eaten broccoli seeds.
And when we tried them, they're quite bitter.
But interestingly, if you bake them just gently, don't scorch them, if you bake them, they
get their very nutty taste and they're sort of pleasant tasting.
The problem is if you bake them, you kill the enzyme, you kill myrosinase.
Because it's a...
[Rhonda]: Right.
So that's something important, retention.
[Jed]: Yeah.
So there actually have been some epidemiologic studies, and I'm getting off topic a bit,
but some epidemiologic studies suggesting that people who eat certain amounts of cruciferous
vegetables have reduced risks of various cancers.
Breast cancer and lung cancer are high on the list of cancers that have been studied.
Excuse me.
And it turns out that if you eat raw cruciferous vegetables, you're a bit better protected,
again, based on the epidemiology.
This has not been the subject of interventions of randomized clinical trials, for example.
But it looks like the protective effect is greater if you eat raw vegetables.
But now, a lot of people don't like to eat raw cauliflower or broccoli or...well, radishes,
they do.
So at any rate, you asked about the content in broccoli seeds and indeed, they have much
more glucoraphanin and they have plenty of active myrosinase.
But I have a feeling, I've never made a smoothie from raw broccoli seeds.
I have a feeling it would be pretty bitter.
[Rhonda]: I'll let you know, because I'm going to try it.
[Jed]: I thought you might.