Juicing has never made much sense to me, and it makes even less sense since I've been into Paleo/low carb eating. The first book I read on this topic was
The Saccharine Disease which is a little dated but a good free intro.
Consider this:
The overconsumption, as stated, stems from the concentration present in refined carbohydrates, which concentration not only deceives the taste buds in the tongue, so that they cannot signal accurately
enough when to stop eating these foods, but also interferes with the normal distension of the stomach and hence with the feeling of satiety. This is all easily perceived if eating a small quantity of sugar, say roughly a teaspoonful, is contrasted with eating the same quantity of sugar in a natural form, such as exists in an ordinary apple. A person can take down teaspoonfuls of sugar fast enough, whether in tea or any other vehicle, but he will soon slow up on the equivalent number of apples. No deception takes place with these. The argument can be extended to contrasting the 5oz. of sugar consumed, on the average, per head per day in these islands with up to a score of average-sized apples, or with a large sugar beet weighing some 2-1/2 lb., in which this quantity of sugar approximately is present. Who would consume that quantity daily of the natural food? Or if he did,what else would he be eating?
Juicing is a processed food after all. Carrot juice is better for you then, say, Coke, but why would it be better than carrots?
Steve Jobs ate only fruit for a number of years and I can't help but wonder if it affected his body (pancreas in particular) negatively.
...we look back at Steve Jobs’ crazy dietary beliefs that he followed for the better part of his life and was greatly influenced by a book written by German author Arnold Ehret entitled The Mucusless Diet Healing System.
Ashton Kutcher followed the diet to get into the mood for the role and ended up in the emergency room for his efforts as his insulin levels fluctuated out of control. The actor lost 18 pounds to look the part of the thin Jobs and actually criticised the diet. ‘[The book] talked about the value of grape sugar and that was probably the only pure sugar you could have in your body,’ Kutcher told reporters during a Jobs press conference in New York City. ‘I think the guy who wrote that book was pretty misinformed. My insulin levels got pretty messed up and my pancreas kind of went into some crazy, the levels were really off and it was painful. I didn’t know what was wrong.’
full article