1: http://www.guysandstthomas.nhs.uk/resources/patient-informat...
It's perhaps better to tell patients to "eat balanced and enjoy yourself with a treat from time to time like anyone else" and stamp some medical authority behind it rather than have them obsess over diet to the point where they become hooked by all the predators selling fad diet cures.
These shakes are also low on lactase because depending on the chemo patients can become intollerant to lactase (either through the chemo or antibiotics that are given). They are also low on fibre so its easier to digest.
Good luck eating your veg and protein when you immediately vomit it back up.
Now I enjoy them just fine and cook with them, but every time I see one I still remember throwing up as a child.
I could never eat that again. My brain tied it directly to bad feelings.
I couldn't drink tequila for years after getting so drunk, and so sick from it.
On the other hand, I've read recently that fasting improved chemo tolerance because it puts healthy cells at rest while the cancerous ones are oblivious to the reduced calories intake... Not sure if it is universal. Such an early study was likely targeted a specific kind of cancer.
Also, seem to me the basic complication of dealing with cancers is that anything that will kill a cancer cell is likely to also kill healthy cells. So inversely, whatever you do to keep the patient alive is likely to also exasperate the cancer problem.