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Effects on humans and other mammalsGlucosinolates are well known for their toxic effects (mainly as goitrogens) in both humans and animals at high doses. In contrast, at subtoxic doses, their hydrolytic and metabolic products act as chemoprotective agents against chemically-induced carcinogens by blocking the initiation of tumors in a variety of rodent tissues, such as the liver, colon, mammary gland, pancreas, etc. They exhibit their effect by inducing Phase I and Phase II enzymes, inhibiting the enzyme activation, modifying the steroid hormone metabolism and protecting against oxidative damages. In particular, the chemopreventive effects of the glucosinolates present in cruciferous vegetables are related to their activity as Histone deacetylase inhibitors.
It is sufficient that lots of them are still here in a way that they wouldn't be if they had fried their chips in nicotine.
", but how about you drink a couple of litres of pure, non-toxic Canola?"Over the years, I almost certainly have- many times.
You say "We know that many pesticides, herbicides, fungicides etc are also toxic to humans."How do we know that?Well, we sometimes know it from acute exposure- accidents or suicides etc.But more often we know it from epidemiological studies.
Now, just as soon as you show me the study (a real one which stands up to scrutiny- not a rant from some pressure group) you will have a point.
Until then you need to be careful who you describe as "less scientific then they need to be"
Unfortunately, I find your arguments less scientific, and far less convincing than I think they need to be.