I think mushrooms are great medicine and have excellent cancer fighting compounds in them. Something else I really like along these lines is turmeric with its cancer fighting compound curcumin. I believe these are two excellent tools to have in the herbal arsenal for staying healthy and helping stack the deck in favor of avoiding cancer in the first place.
"Study books and observe nature; if they do not agree, throw away the books." ~ William A. Albrecht
Mushrooms are effective for certain types of cancers but they aren't going to win the war that goes on within the body.
Almost all cancers have the ability to cloak their presence from the immune system so the first thing that is needed is a way to shut down that cloaking system so the body can identify the offender and send in the swat team.
At the same time the immune system will custom tailor the killer cells so they can use a direct attack approach instead of a surround and eat away approach.
Some mushroom compounds do help with this but most of the compounds in mushrooms are more effective at providing a foundation for the killer cells the T cells pump out.
As a preventative they are extremely good and being tasty is quite nice as well.
One of the best herbs to incorporate with the mushrooms when trying to keep yourself healthy or trying to get through a cancer illness is sheep sorrel, the roots are the primary part of this plant that has compounds that directly attack the cancer cells, stripping away the rogue cells defenses and thus allowing the bolstered immune system to go on the offensive, attack after attack.
The main problem I see happening with people who wisely decide to use these "alternative" methods is that they incorporate too many items without doing enough research about possibilities of interactions or outright canceling of what ever drugs their doctor is using to battle the cancer.
This is actually dangerous to the point of making the patient doing more harm to themselves than if they had just left it to the doctors judgement call.
However, when one does their research and homework, limiting their own additions to one trial ingredient at a time, taking notes of what their body is telling them and what the test results show, one can speed up the cure of their ailment.
Mushrooms are great for many things but just like all herbal remedies, you have to have the knowledge to be able to use them for best effects.
We are living in very fortunate times, many researchers are focusing on finding cures instead of the usual focusing on treatments that simply treat the symptoms per the AMA directives.
I think these conversations often get bogged down with the idea that one must eschew conventional treatment entirely to benefit from alternative therapies, or that there must be a solution in a single package. I don't agree with this assessment.
I think that a comprehensive, holistic approach is probably best, both in terms of prevention, and in the case that cancer develops. Why would I eat only mushrooms if I could also drink tumeric, kale, and blueberry smoothies? Why wouldn't I do things to boost my body's natural capacity to fend for itself, even as other avenues of treatment are explored?
As prevention, avoiding exposure to carcinogens tops the list, I think, perhaps over any treatment. Then a diet rich in fruits and vegetables, to provide all kinds of phytonutrients and antioxidants, all those good, dark- or bright-colour compounds in our fruits and veggies, everything. I love garlic and onions, to the point where I don't think any parasite could live in my blood, and my touch will wither vampires.
I have heard that encouraging more alkalinity in the body is beneficial to keeping cancer cell counts down, though I know there are differing opinions on how that may be best accomplished.
Also, ensuring the body isn't mineral- or nutrient-deficient is apparently much more of a big deal than many realise. Some focus on the calcium/magnesium ratio, which makes me think of their interaction in soil.
I read a while back in a statistical dietary study in Japan, if I remember correctly, that tracked cancer levels in an area where mushrooms made up a disproportionate amount of the diet, that the cancer rate in older women was a fraction of that in the West, and it was attributed to the mushrooms.
Of the mushrooms I have heard mentioned, Lion's Mane and Turkey Tail are the ones I have most often heard about having anti-cancerous properties.
Personally, I love mushrooms. One of my favourite soups that I have ever made was a Chanterelle soup. I grew up on chanterelle omelettes at the cottage because they symbiose with the stands of jack pine, and are distinctive enough that one isn't likely to be confused about their identity. Oh, and they're fucking delicious.
I think the most proof, though, exists with the studies performed. Those would probably be pharmaceutical in nature. Those, too, are getting better, but I think that if they focused on shutting down that cloaking device that kola Redhawk mentioned, that healthy human bodies would put a swift end to cancer in the body.
I do wish, though, that we could isolate a single plant, fungus, or even animal, that had the capacity to shut down that cloak, so that we could simply eat it prophylactically.
"Oh, and waiter, I will have the Lion's Mane and Turkey Tail mushroom and Sweetbreads Terrine, please."
A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
-Robert A. Heinlein