I'd be interested to know which of these have been clinically reported on in a controlled clinical trial (that all pharmaceuticals have to pass) - just because Holland & Barrett and the like write whatever bollocks comes into their head on the label does not mean it is true
I think you should be aware that supplement manufacturers by law cannot put any claims on their labelling. I think you must also be aware that drug companies don't undertake clinical trials for things they can't patent as there is no mega money in it for them.Vitamin D3, Boron and Selenium are classic examples of mega useful supplements you will never get "on prescription" it doesn't mean they have no efficacy.
Many pharmaceutical drugs are derived from natural sources in the first place
If you are interested then be my guest and do your own research.
But here's a starter. Take the second one as an example, broccomax containing sulforaphane as well as indole-3-carbinol, 3,3’-diindolylmethane, and phenethyl isothiocyanate
External Link/Members Only "There is increasing evidence that isothiocyanates such as sulforaphane play an important role in human health and the prevention of diseases such as cancer, ischemia reperfusion damage and others [5,28,29]. The current study further characterizes the bioavailability and kinetics of ITCs from a whole food source versus a dietary supplement, and have implications regarding consumer choices of how to best incorporate the chemopreventive effects of sulforaphane into their diets."
And some more light reading with references for anyone who is interested;
External Link/Members Only