 According to some macrobiotic advocates, a majority of the world population in the past ate a diet based primarily on grains, vegetables, and other plants.Because the macrobiotic diet was developed in Japan, Japanese foods that are thought to be beneficial for health are incorporated by most modern macrobiotic eaters.The American Cancer Society recommends "low-fat, high-fiber diets that consist mainly of plant products"; however, they urge people with cancer not to rely on a dietary program as an exclusive or primary means of treatment.