Enhansing nutrient density through the removal of fiber raises nutrient absorbtion dramaticaly.Some substances such as grass juics are diffcult to obtain without a juicer.It all depends on what you want to do and where you are at relavant to health and vitality.I was under the impression you had researched such concepts as enzyme replacement thearapy.You will find these therapies used at healing retreats such as hippocrates institutes,tree of life,an many others as well.Juice fasting is about letting the digestive track rest by not eating solid food.Conserving the energy for other uses such as rebuilding, detoxifying,and basic rejuvination.There is a good book by Steve Meyerowitz called Juice Fasting and Detoxification.First off you have a centrifical juicer,mastiction is far better.Second soft fruit juices poorly,low yield and quality.Hard veggies work best for centrifcals,but greens the true powerhouses of vegetation dont.If the focus of food is sweetness not nutrient density then you are wasting your time.When you said you liked tomato juice did you mean somthing like v8 juice?But alas juiceing and blending is not for everyone.Learning to use these tools is part of the culinary arts.Some will take theme to new heights,and some to a yard sale.Be wise be green be healthy,and happy new year!!