From Wikipedia, the free encyclopedia. A macrobiotic diet (or macrobiotics), is a dietary regimen which involves eating grains as a staple food, supplemented with other foods such as local vegetables, and avoiding the use of highly processed or refined foods and most animal products. macrobiotic diet includes many of the same foods as vegetarian diets, but in macrobiotics some types of fish and other animal products are often included according to individual needs, although it is recommended that people on the diet avoid milk and other dairy products.