Pumpkin juice is one of the healthy juices you can have. Its composition is so good that there are like a lot of nutrients presents in it, including vitamins and minerals. But I must tell you it wont make much of a difference to your weight loss programe as it does not affect in both ways. Although it would definitely help you as far are cholesterol management is concerned. Other than that for weight loss it does not help much, but it does have its own unique medicinal qualities in it and scientifically it is use to cure a lot of illness which are generally very hard to cure.