Found this recommended check list for assessing whether a diet was a fad and considered it could equally apply to diets promoted to help fight or cure cancer:
"Each year, new weight loss diets appear that promise to reveal the ultimate secret of success – if only you buy the book, pills or potions.
When assessing whether a diet is a fad, ask yourself, does the diet:
- contradict advice from qualified health professionals?
- promote or ban specific foods or whole food groups?
- promote a one-size-fits-all strategy?
- promise quick, dramatic or miraculous results with minimal effort?
- focus only on short-term results?
- promote “miracle” pills, supplements or products touted to “burn fat”?
- make claims based on personal testimonials or one random study?
If the answer to two or more of these questions is “yes”, it’s probably a fad. "
Full article is from the University of Newcastle, Australia academics Clare Collins, Professor in Nutrition and Dietetics, Postdoctoral research fellow Lee Ashton plus Postdoctoral Researcher Rebecca Williams: theconversation.com/blood-t...
The article looks specifically at the Blood type, Pioppi, Gluten-free and Mediterranean diets and concludes with the advice "If you need help or to check whether you are meeting your nutrient needs, consult your GP or a dietitian." Conveniently, there's a link to finding an Accredited Practising Dietitian in Australia and I'd hope that other countries have similar lists to accredited diet specialists.