Chinese Association of Idaho State University (CAISU)
People juice for a number of different reasons to increase their fruit and veggie intake, alleviate various ailments or to use as a detox. When it comes to weight gain, you might not think of juicing as an option. But juice is a concentrated source of calories, and can help you gain if it increases your overall caloric intake. However, juice is a concentrated source of sugar and has negligible protein, so it should not be your only means of helping you gain weight. Consult your doctor before making changes to your diet.