Below is one of my biggest reasons for juicing IMO. I juice with the goal of understanding what it does to my body and the benefits of said juice. Here are a few examples of what my research has found as opposed to just having a spinach or kale smoothie I've sought to add the benefits of the juice you drink and what combinations you can use. If you know what the solution is for you problem then you are way ahead of the game.

ACNE
Impurities in the body are trying to be eliminated through the skin. One of the manifestations of acidosis. Refrain from using salves and ointments, drugs of any kind, and X-ray, using instead natural methods to remove the cause.
Juice (Carrot 8oz; Lettuce 5oz; Spinach 3 oz)

FATIGUE
An indication that the cells of the body are not getting sufficient live atoms in the food to furnish the constant flow of new energy needed. Fatigue is one of the precursors of disease. The cumulative effect is the destruction of tissue cells and the consequent accumulation of waste in the body; if not removed, this will be scavenged by germs and bacteria. Rest, sleep, cleansing of the colon, and plenty of juices have been found to be the best method to overcome fatigue.
Juice (Carrot 9oz; Beet 3oz; Cucumber 3oz)

HEADACHES
Any one of more than 200 manifestations that the body is overloaded with waste matter. Nature's warning to give the body a thorough cleansing, thus reestablishing the equilibrium of the blood and releasing its excessive pressure in the regions of the head.
Juice (Carrot 7oz; Celery 4oz; Parsley 2oz; Spinach 3oz)

BLOOD PRESSURE, HIGH:
The result of impurities in the blood vessels. The only way impurities can get into the blood stream is (1) by hypodermic injections and drugs, whether taken as medicine or otherwise; (2) by deposits in the blood stream of inorganic atoms accumulating from cooked and processed foods, particularly the concentrated starches and sugars; and (3) by retention of waste in the eliminative organs and channels. The recurrence of high blood pressure within families is not due to heredity, as erroneously supposed by some, unless we consider the degenerated condition of the mother's blood stream (due to eating inorganic foods) as her hereditary gift
to her child. The only hereditary trait is the kind and quality of the food the family as a whole habitually indulges in; if this contains an excessive proportion of cooked foods and concentrated carbohydrates, it is only natural that a nutritional deficiency should manifest in most, if not in all its members.
Juice (Carrot 7oz; Celery 4oz; Parsley 2oz; Spinach 3oz)

ECZEMA:
Inflammatory condition of the skin due to excessive acidity of the lymph glands. Also, the elimination through the pores of the skin of waste matter which should really pass out through the
kidneys and the bowels. Remedy (Juice....Carrot 7 oz; Celery 4 oz; Parsley 2oz; Spinach 3 oz) or (Carrot 10oz; Beet 3oz; Cucumber 3oz).

INSOMNIA: Inability to sleep as a result of nervous tension or excessive acidity in the system.
Juice (Carrot 9oz; Celery 4oz; Spinach 3oz)