Cancer and nutrition

The below is a system based on Yin-Yang approach the same for acupuncture,

the Macrobiotics system which divides all products into Yin and Yang group.

Basics and full list are in books of George Ozawa and the below short list of products is taken
from a book of Kasudzo Nishi.

Yang:

--- rice, millet, wheat, buckwheat, 

--- duck, turkey, pigeon, partrige, pheasant
--- goat's milk, Roquefort and Edam cheese

--- shrimp, lobster, sardines, herring, salmon and other fish with pink flesh; caviar, --- radish, turnip, onion, garlic, parsley, dill, carrots, chestnuts, apples, salt, eggs, strawberry, cherry.

Especially strong Yang products: backwheet, carrot, caviar

Yin:
corn (not American word for wheat!) , rye, barley, oats, oysters, carp, eel, trout,
pike, tuna, flounder, eggplant, tomatoes, potatoes,
beans, cucumbers, zucchini, mushrooms, beets, garlic,
cabbage, pork, beef, veal, lamb, chicken, kefir, yogurt,
sour cream, cottage cheese, butter, milk, cheese,
pineapple, orange, mandarin, banana, lemon, pear,
grapes, nuts, watermelon, plum, honey, sugar, zhity,
coffee, wine, beer.
Especially strong Yin of the listed: potatoes, tomatoes, yogurt, eggplants, grape.

One can see 2/3 of products are Yin.
This is very notable regarding to cancer:
--- it's main energy is Cold=Yin
--- energy for spreading i.e. Burn is secondary.
 
Macrobiotics founders directlly pointed on switching to fully Yang diet when battling cancer.
As there are different types of cancers for their location and behavour, this may be as:
--- generally it's adviced to have excesss of Yang meals
--- 100% Yang is difficult to achive as there are valuable products among strong Yin to support digestion 
like yogurt/kefir
--- this may indicate 85% maybe 90% Yang as top value
--- for very aggressive cancer with a lot of Yang energy,  Yang fraction my be reduced
--- anyway the lowest Yang percentage is to be no less 65%.