In yoga philosophy, all matter including food is organized into three Gunas:
A yogic diet consists of sattvic [pure] foods that calm the mind and sharpen the intellect. These are pure, wholesome, and naturally delicious, without preservatives or artificial flavorings. They include fresh and dried fruits and berries, pure fruit juices, raw or lightly cooked vegetables, salads, grains, legumes, nuts, seeds, whole-grain breads, honey, fresh herbs, and herbal teas. In the book Yoga, Mind and Body it says, "A sattvic diet is easily digested and supplies maximum energy, increasing vitality, strength, and endurance. It will help eliminate fatigue, even for those who undertake strenuous and difficult work. Yogis believe that people’s food preferences reflect their level of mental purity and that these preferences alter as they...