Langahna is a form of ayurvedic therapy and is defined as whatever produces lightness in the body. It can also be known as “reducing therapy”. According to the principles of Ayurveda, substances possessing light, hot, sharp, non-slimy, rough, minute, coarse, unstable and hard properties have the best reducing effect. According to the principles of Ayurveda, substances possessing light, hot, sharp, non-slimy, rough, minute, coarse, unstable and hard properties have the best reducing effect. Vagbhata also uses the word langhana as a synonym of upavasa or fasting. Another definition of langhana is the consumption of easily digestible food. According to Vagbhata, apatarpana, or the consumption of less quantity of food, is also langhana. According to Charaka, langhana is of 10 types – vamana, virecana, nasya, raktamokshana, thirst, exposure to wind, exposure to sun, digestive measure, fasting and physical exercise. Some experts add appetite stimulation to this list. Those who