The Collison Newsletter April 2009



Why Juice? 

The rationale for drinking raw, fresh vegetable and fruit juices is set out in detail in Chapter 8 of my book ‘How to Live to 100+ Years Free from Symptoms and Disease’ (see homepage).

“Drinking the freshly extracted juices of vegetables is the fastest way to obtain the nutrients necessary to restore the human body to health.” (Page 75).


It is generally recommended to ‘juice your vegetables and eat your fruit’.


It is suggested that 300ml of fresh vegetable juice should be consumed each day for general health. A basic recipe is: 5 medium carrots (450gm), 1 large apple (200gm) and greens such as celery, spinach, cucumber (100gm). This will produce about 300ml, of which 50% is carrot, and provides about 330calaries / 1380kilojoules.


This newsletter looks at the use of juices for therapeutic purposes and it is suggested that Chapter 8,“Vegetable and Fruit Juices”, be read in conjunction with the following.

Raw Juice Therapy  -  Juice Fasting 

Raw juice therapy is a method of treatment of disease through an exclusive diet of juices of fruits and vegetables. It is also known as ‘juice fasting’. This term is not strictly correct, since ‘fasting’ really refers to no food intake whatever, water only,


Water fasting has a long history as a therapeutic method and although the author has extensive experience in supervising water fasts (one in excess of 240 days), it is ‘juice fasting’ that is now recommended as the best and safest way of bringing about detoxification and facilitating the healing process.


A juice fast is a liquid, nourishing ‘diet’ of juices and water only.


Raw juice therapy, or a juice fast, is the most effective way to restore health and rejuvenate the body. During raw juice therapy, the elimination and cleansing capacity of the organs of elimination, namely the lungs, liver, gastrointestinal tract, kidney and the skin, is greatly increased and metabolic waste and toxins are quickly eliminated. It also affords physiological rest to the digestive and assimilative organs, allowing the energy normally involved in the complex process of digestion to be channelled into the healing process and detoxification.

Juice Fasting rather than Water Fasting 

An exclusive diet of raw juices of fruits and vegetables results in much faster recovery from diseases, and more effective cleansing and regeneration of the tissues, than fasting on pure water. During fasting, the body burns up and excretes huge amounts of accumulated wastes. This cleansing process, and the healing effect of fasting, is helped by drinking alkaline juices instead of water while fasting. All fruit and vegetable juices are alkaline-forming. This means that, after digestion and metabolism, the waste is alkaline (see my September 2005 newsletter ‘Acid/Alkaline Balance – The Ideal Diet’). Elimination of uric acid and other inorganic acids will be accelerated. The natural sugars in the juices supply a limited amount of energy. Although the majority of the energy needed by the body comes from the fat stores during fasting, the small amount of energy supplied by the juices is ‘protein sparing’, meaning that protein (muscle) is not used for energy.


It could be said that juice fasting is safer than water fasting because it supports the body nutritionally while cleansing and probably produces a better detoxification and quicker recovery time. Water fasting is safe, but like juice fasting, any fast longer than three to five days should be supervised by an experienced health professional. 


As mentioned, juice fasting is low in calories/kilojoules. Thus the energy requirements of the body during fasting have to be obtained from the fat stores. Much of the toxins in our body are stored in our body fat. Metabolising the fat forces the toxins into the blood stream where the body processes them to be eliminated. Water fasting would maximise the metabolism of fat and the release of toxins. Very often, however, the amount of toxins freed into he blood stream is so great in water (only) fasting that the ‘detoxification symptoms’ are so severe that the fast has to be broken. Juice fasting is a gentler way of undergoing detoxification and hence is much better tolerated.

What are the Favourable Effects of Raw Juices? 

ź         Raw juices of fruits and vegetables are extremely rich in vitamins, minerals, trace elements, living enzymes, natural sugars, antioxidants and phytochemicals. Especially is this so if the fruits and vegetables are organic, and they should be, if at all possible. See chapter 9 ‘Raw is Better’ in ‘How to Live to 100+ Years Free from Symptoms and Disease’ and my April 2007 newsletter ‘Cooked Food is Poison – Why Raw is Better’. Organic foods have the highest levels of minerals and trace elements which are essential for the body’s own healing activity and cellular regeneration, thereby speeding recovery.

ź         The juices extracted from raw fruits and vegetables require virtually no digestion and almost all their vital nutrients are assimilated directly into the blood stream.

ź         Raw juices are extremely rich in alkaline elements.

ź         The minerals in juices are organic, meaning they are part of the living plant and not inorganic as they are in the soil before being taken up by the plant. Thus they are easily absorbed into the blood stream and so available to help restore the biochemical and mineral balance in the tissues and cells.

ź         Juices from different fruits and vegetables are beneficial in specific conditions. For example, fresh juices of garlic and onions (added to the basic juice as set out above) contain antibiotic substances. Whole books are devoted to the specific juices and their disease applications. For example ‘Fresh Vegetable and Fruit Juices’ by Dr Norman W.Walker (1981). In this definitive book, Dr Walker lists 150 ailments and recommends which juices to use, in what proportions. A more recent (and briefer) book is ‘Raw Juice Therapy’ by Dr N.N.Saha (2000).

ź         Juice fasting is an excellent and safe way to lose weight.


Juice fasting works because it does two things:

ź         It removes toxins

ź         It increases nutrients.

Juice Fasting and the Immune System 

The following effects on the immune system have been observed during juice fasting:

ź         Elevated macrophage activity. Macrophages form an important first line of defence against bacteria, viruses and other harmful foreign substances.

ź         Increased cell-mediated immunity. The cells responsible for this are the lymphocytes. The lymphocytes are white cells and are responsible for the body’s ability to distinguish, and react to, foreign substances. The T-lymphocytes are responsible for continuous surveillance of cell surfaces for the presence of foreign antigens.

ź         Increased immunoglobulin levels. Immunoglobulin is used to provide passive immunity to a variety of diseases.

ź         Increased neutrophil activity. Neutrophils are also white cells and actively engulf bacteria and other micro-organisms and microscopic particles, destroying or inactivating them.

ź         Enhanced natural killer T-cell activity. The T-cells (leucocytes or white cells) play an important role in checking the growth of tumour cells and cells infected with some viruses. 

One Days Fast each Week 

In both my books ‘How to Stop Feeling So Awful’ and ‘How to Live to 100+ Years Free from Symptoms and Disease’, it is recommended that one day each week be a fast day. This means consuming only water and/or fresh juices for 30 to 36 hours. The way to do this is set out in pages 94-95 and 111-113 (respectively) in the two books. The purpose of this short weekly fast is to assist the body to detoxify regularly, and thus promote better health. When only water or juice is consumed, energy from glucose comes initially from the glucose in the blood. As this is consumed it is replaced from the glycogen stores, and as these are depleted, gluconeogenesis (the formation of glucose from other substances, mainly fat) takes place. In this latter process, the body, in its innate wisdom, burns up the ‘rubbish’ first, leading to effective and efficient detoxification.


This regular one day fast (each week) is the ideal way to prepare for Raw Juice Therapy, or Juice Fasting, where all food intake is suspended for several days and even weeks while raw, fresh juices and water only are consumed.

An Experiment that Illustrates the Benefit of Fasting 

The following is the summary of experiments carried out by Drs A. J. Carlson and F. Hoelzel, published in The Journal of Nutrition, “Apparent Prolongation of the Life Span of Rats by Intermittent Fasting” (1946) page 374.

ź         “Tests in which a group of thirty-one rats were allowed the same food ad libitum and groups of thirty-seven, thirty-seven and thirty rats were fasted 1 day in 4, 3, and 2, respectively, after the age of 42 days, showed that the apparent life span was increased by the intermittent fasting. The optimum amount of fasting appeared to be 1 day in 3 and this increased the life span of littermate males about 20% and littermate females about 15%.

ź         No drastic retardation of growth was produced by the intermittent fasting but the development of mammary tumors was retarded in proportion to the amount of fasting,”


It is well known that the only way to increase life expectancy in animals is by calorie restriction (every day). This study shows intermittent fasting to be significantly beneficial while allowing unrestricted eating on non-fast days.


Many authors recommended a preparatory period before undertaking a fast (water or juice). This involves restricting the intake of certain foods, going onto fruits only etc.


When it is necessary to have raw juice therapy, ie when the body is in crisis and expressing this with a variety of symptoms and disease states, then start it immediately. If a days fast each week has been the routine, it is straight forward to go onto a ‘diet’ of fresh juices only.

Withdrawal Symptoms 

Initially after consuming fresh juices only, symptoms may be experienced which result from two causes. The first is the withdrawal symptoms which occur when foods to which there is an intolerance are no longer consumed. This is discussed in detail in ‘How to Stop Felling So Awful’ (see home page). The second cause of symptoms is the mobilisation of the toxins as described above.


The common symptoms include: headache, dizziness, nausea, bad breath, a heavily-coated tongue, weakness and brain fog. Vomiting is uncommon, but can occur. Hunger may, initially, be intense. Later, there may be skin reactions such as pimples.


Ketones are formed by the incomplete metabolism of fats, which takes place during fasting when the fats are used for gluconeogenesis. These give a characteristic smell to the breath, namely that of newly-mown hay. A positive effect of the ketones is to suppress the appetite so that the desire to eat will disappear. It takes two to three days for ketosis (the presence of ketones) to develop fully.


Later in the fast, enhanced energy is experienced, with a clear-mindedness. During prolonged fasts, so-called ‘healing crises’ may occur. These express themselves as withdrawal symptoms, as described above, and generally only last a short time.

How Long should a Juice Fast Last? 

Fasting should be restricted to adults only. Children can fast, but must be closely supervised by a professional experienced in therapeutic fasting.


As described above, a 30 to 36 hour juice fast should be undertaken each week to promote general health and assist in disease prevention. This is a one day fast.


The length of a juice fast, or raw juice therapy, can last anywhere from three to up to forty days.


Initially, a three day raw juice fast is recommended, especially if the weekly fast day has not been undertaken. A fast of this length generally does not require supervision by an experienced health practitioner. A fast of longer than five days should be supervised.


Longer juice fasts enable the body to cleanse toxins that have accumulation over time. Within reason, the longer the fast, the more detoxification takes place.


How long? is determined by your response to the fast, by the severity of the withdrawal symptoms, by how you feel and the change or improvement in the symptoms that have prompted you to undertake an extended juice fast as therapy. Also, the input from the supervising health professional will assist in knowing when to break the fast.


If medication is being taken, the dose must be supervised during the fast. With the inevitable loss of weight, a reduction in dosage will probably be required to avoid a possible overdose.


A general guideline to the length of a juice fast is to continue fasting until the detoxification symptoms have been absent for two days.


In cases of severe illness, some practitioners suggest a juice fasting program for, perhaps, two to three days a week and the rest of the time a diet of fresh fruits and vegetables, for several weeks.

Modified Juice Fasting 

In those with health restrictions such as diabetes or hypoglycaemia a modified juice fast may be indicated. As well as the juices, thin slices of avocado, or some banana or limited amounts of other fruits may be added. This will assist in maintaining a stable blood sugar in these conditions. The addition of these non-juiced foods will slow the intensity of the detoxification, but will allow the benefits of the modified fast to be experienced when fasting may otherwise not be undertaken.

How much Juice should be Consumed? 

The amount of juice you drink will determine the intensity of the cleansing process and detoxification. Drinking small amounts of juice supplies fewer calories/kilojoules, thereby increasing detoxification. The more intense the cleansing, the greater the discomfort (withdrawal symptoms). However, when there is a healing crisis due to toxins in the blood, no amount of juice will eliminate the discomfort.


The actual volume consumed each day will vary. It may be that 300 to 600 ml per day is sufficient. Initially the volume needed may be higher … even up to two litres. In clinics like the Gerson Institute up to three litres of fresh juice (mainly carrot) is consumed each day. This is part of the treatment of severely unwell people, for example, with terminal cancer.


Vegetable juices are generally taken undiluted. When fruit juices are part of your regime, it is often worth diluting them with water (1:1 is sufficient).


Juice fasting can also include herbal teas, green tea (see my September 2007 newsletter ‘A Cup of Tea= a Cup of Good Health’), barley green (see my November 2006 newsletter ‘Green Barley Powder’) or wheat grass juice.


ź         All juices should be made fresh immediately before drinking.

ź         Canned and commercial juices are better not consumed.

ź         Only fresh ripe fruits and vegetables, preferably organically grown, should be used for the extraction of juices.

ź         Prepare only the amount of juice for immediate consumption. Raw juices oxidise rapidly and lose some of their medicinal value in storage, even when refrigerated.

ź         The quality of the juices has a distinct bearing on the results obtained. In the case of incomplete extraction of juices, their effective power is proportionally reduced due to the absence of the vitamins and enzymes which are left behind in the fibre and the pulp.

Types of Fruit and Vegetable Juices 

Fruit and vegetable juices can be divided into seven main types.

1.      Juices from sweet fruits, for example grapes.

2.      Juices from melons: watermelon, honeydew melon and rockmelon (cantaloupe).

3.      Juices from sub-acid fruits, for example apple, pear and cherry.

4.      Juices from acid fruits, for example oranges and pineapple (these are alkali-forming once digested and metabolised).

5.      Juices from vegetable fruits, for example tomato and cucumber.

6.      Juices from leafy vegetables, for example cabbage, celery, lettuce and spinach.

7.      Juices from root vegetables, for example carrot and beetroot.


The rules of food combining apply to juices. For a detailed discussion of this, refer to Chapter 12 ‘Food Combining’ in ‘How to Live to 100+ Years Free from Symptoms and Disease’.  In general, vegetable juices should not be combined with fruit juices. The exception to this is the addition of apple juice to vegetable juices.


Melon juices should not be combined with other fruit or vegetable juices.


It seems that fruit juices stir up toxins and acids in the body more than vegetable juices. It is desirable to use juices individually when used therapeutically. In any case, not more than three juices should be used in any one mixture.


As already mentioned, a detailed listing of the best juice for specific conditions can be accessed in the books listed above.


Again, in general terms, carrot juice is a fundamental juice in the therapeutic and healing process.


The recipe set out at the beginning of this newsletter is an excellent basic juice mixture.

Breaking the Fast 

After the one day fast, simply return to your normal diet which should follow the principles set out in my September 2006 newsletter ‘Acid/Alkaline Balance- The Ideal Diet’ and my March 2009 newsletter ‘Foods for Health’.


If you undertake a longer juice fast, depending on how long the fast has been, a gradual return to a normal diet should take place. Initially add fresh fruit, perhaps some vegetable broth, and then salads and vegetables. After fasting, the stomach has shrunken and there is little or no appetite. So the initial meals should be small, gradually increasing in size over a few days.


For better health and disease prevention, one days fast each week is highly recommended.


Juice fasting is a powerful therapy that is used throughout the world. Juice fasting accomplishes the task of removing excess mucous, dead cells, and other entrapped toxins from the body and at the same time supplies an abundant source of nutrients which the body, in its renewed energy level, immediately utilizes to heal.


This is a powerful regeneration process, and it is yours to accomplish. You don’t need to go anywhere. You don’t have to have a procedure or operation performed on you. You may not have to take drugs. You do it yourself. It is not easy to fast. It does require discipline and the cooperation of those around you.


But the end result is well worth the effort.


Healing, better health and disease prevention are the results of raw juice therapy or juice fasting.


*Copyright 2009: The Huntly Centre. 

Disclaimer: All material on the website is provided for informational or educational purposes only. Consult a health professional regarding the applicability of any opinions or recommendations expressed herein, with respect to your symptoms or medical condition.


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