Actually I found this too which might also help others:
Preparation steps accordingly and consumed at least 3 litres of water daily.
However, a small proportion of customers may experience some temporary side effects (as outlined below), which are commonly associated with any weight loss regime. You could avoid these side effects by drinking plenty of fluid.
EffectCauseActionHeadachesDehydration Carbohydrate or caffeine withdrawal (rarely)
Increase fluid intake Take a painkiller if necessary.
Mild dizzinessDehydrationIncrease fluid intake.Diarrhoea or Nauseaa) Concentrated Minerals & Vitamins
b) Lactose Intolerance
Increase fluid intake, divide the Diet into 6 small portions a day. Discontinue the diet if the symptoms do not settle down. Change to lactose free flavour.
HungerTemporary feature for first 2 to 3 daysIncrease fluid intake. Engage in a busy work schedule to divert attention on food. Take an extra half or one sachet of The Cambridge Diet if necessary.ConstipationLow BulkIncrease fluid intake. Use a natural bulking agent such as Fybogel if necessary.Allergic reactionMay be allergy to milk proteinChange to lactose free flavour.Bad breathExcretion of ketonesIncrease fluid intake & rinse your mouth regularly. Take a sugar free breath freshener if necessary