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Step 1 is a nutritionally complete formula food (often referred to as a very low calorie diet, or the 'sole source of nutrition') which can be ideal for those who prefer a period of time away from the temptations of conventional food. Sole
Source is suitable for those above BMI 25, with at least a stone (6.3kg) to lose.
Using the 'Sole Source' programme is not advisable when certain medical conditions are present. We say these conditions are 'contra-indicated'. There are also a number of medical conditions with which 'Sole Source' may be used with special precautions (see below). Cambridge recommends that the Sole Source programme is followed for no longer than four weeks at a time. At that point, if target weight has not yet been reached, the dieter should have an 'Add a Meal' week. |