Perricone Diet Disadvantages

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There are a number of disadvantages to the Perricone diet and some of the main ones are discussed below:

  • Supplements (recommended as part of the diet) are expensive
  • Skin care (recommended as part of the diet) is expensive
  • Difficult for anyone that does not like to eat fish
  • Not entirely suitable for vegetarians
  • No conclusive scientific proof this diet actually works
  • Very little clinical studies on this diet
  • Some food groups are severely restricted (fruits, grains)
  • Diet does not provide enough of all the nutrients
  • Nutrients need to be taken in the form of a supplement
  • Difficult to maintain this diet long-term for many people
  • Not recommended for people with kidney disease
  • Ketosis – dangerous for people certain health conditions
  • Ketosis produces toxic by-products known as ketones
  • Not recommended for pregnant and lactating women
  • Potential for health risks to people on this diet long term
People with impaired kidney function or any other health condition should consult their doctor before trying this or any other diet

References and Explanations

  1. There is very little scientific evidence that this diet works, as there have been no independently published reports on the efficacy of this diet (there are two scientific studies that Dr Perricone has be part of)
  2. Physicians Committee for Responsible Medicine (PCRM). Report: Analysis of Health Problems Associated with High-Protein, High-Fat, Carbohydrate-Restricted Diets Reported via an Online Registry, 25 May 2004. Accessed on 10 January 2008. The author of the PCRM report notes that while low carbohydrate diets do show “modest short-term weight loss”, there have been no studies on the long term health effects of these diets. The report goes on to discuss the negative health impacts of high fat (especially high saturated fat) diets
  3. Yancy WS  Jr, Olsen MK, Guyton JR, Bakst RP, Westman EC. A low-carbohydrate, ketogenic diet versus a low-fat diet to treat obesity and hyperlipidemia: a randomized, controlled trial. Ann Intern Med 2004; 140: 769-777
  4. The Cleveland Clinic. The Lowdown on Low Carbs, 10 January 2004. Accessed on 10 January 2008. The Cleveland Clinic’s review of the Atkins diet is to suggest that it does not contain enough nutrients and may be difficult to sustain long term, which encourages yo-yo dieting. The Cleveland Clinic is one of the major hospitals in the USA and is well-respected for their health advice and research
  5. Adam-Perrot A, Clifton P, Brouns F. Low-carbohydrate diets: nutritional and physiological aspects. Obes Rev. 2006 Feb;7(1):49-58



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