On the other hand, it has a very good description of "oleander" which is not the usual outdated mainstrea misinformation. I should know - I wrote most of it!
You see, Wikipedia is an open-source directory. ANYONE can post information as well as edit existing information there. Which means that anyone who feels that they have more valid information about a given subject such as Gerson and/or feels that the existing information is erroneous, can log on and change it like I did.