Shankha Prakshlana, also known as "Varisara Dhauti" or "Intestinal Cleansing with Saline Water," is an ancient yogic practice designed to cleanse the entire gastrointestinal tract. It involves drinking a large quantity of lukewarm saline water on an empty stomach followed by specific yoga postures and movements to encourage the expulsion of waste material from the colon. This practice is believed to eliminate toxins, improve digestion, and promote overall health and well-being. It's often undertaken as part of a detoxification or purification routine in yoga and Ayurveda traditions.