Peel 2-4 Karela using a knife. 2. Slice the peeled Karela through the center. 3. Spoon out the seeds and the white flesh of the Karela. 4. Cut Karela into small pieces. 5. Soak the pieces in cold water for about 15-20 minutes. 6. Add the pieces in a juicer along with ½ teaspoon of salt and lemon juice. 7. Make a blend of the ingredients. 8. Drink this freshly prepared Karela juice once a day to effectively manage weight.