I know that this is an old post, but here's it goes anyway.. It seems to happen a lot - there's loads of people believing that the pharma / drug / cancer industry actually has cheap cures for deadly diseases but keeps them secret so that they can profit. And then you get articles like this that mix up half truths with exaggerations and misinformation to try to convince you of one or another conspiracy. And, yes, it's true that there's lots of bad behavior and bed people in pretty much any industry. But there is no conspiracy.

In this case, the topic on diets and cancer is really an interesting one. So thanks for the snap. But please don't read this article, I am sure there are better and more balanced reads out there. Or, if you are really scientifically minded you can read actual published research on the topic. Like the review I've added as a related link (hint: jump to the discussion section, this will be more easy to read). Yes, it's published, anyone - scientists, doctors and you can access it and there's no conspiracy that has silenced this research. And research shows that there might be a benefit of some diets when it comes to curing cancer. Here's few interesting quotes from the review, with my comments in brackets:

Our research indicates that CR [caloric restriction] is preventive on cancers as about 91% of relevant studies support the conclusion and the result of meta-analysis [analysis where you compare what conclusions of other studies] is significant. Our findings also indicate that KD [ketogenic diet] can prevent cancer although there are no convincing pooled data. However, no enough evidence indicates the preventive effect of IF [intermittent fasting] on cancers.

Though CR [caloric restriction] was strongly associated with reduced cancer risk in animal models, the effect in human is still unknown. It is almost impossible to assess the long-term cancer incidence of healthy people with CR [caloric restriction] diet. The existing clinical trials were most conducted in obese cancer patients, with biomarkers as the most detected index. However, conclusions of these clinical trials were not always the same.

The role of dietary restriction regimens against cancers in animal models has been studied extensively, but the achievements have not been verified in humans. Therefore, more clinical experiments are needed. Regarding the difficulty in applying these dietary restrictions into humans, more tolerable regimens should be developed. Since conditions differ among cancer patients, individualized treatment plan is necessary, so that each patient can achieve the best therapeutic effect. The incidence of malnutrition is high in cancer patients, and some patients even suffer from cachexia [This is loss of weight, muscle atrophy, fatigue, weakness, and significant loss of appetite]. Consequently, dietary restriction therapy might be a problem for these patients as nutritional support is necessary. There should be a balance between dietary restriction and nutritional support.