Intermittent Fasting

at Scottsdale Weight Loss Center

Weight loss medicine is constantly evolving, and intermittent fasting (IF) is a new and exciting method for losing weight in Scottsdale, Phoenix, Glendale, and Chandler.  Like all diets, Intermittent Fasting is most successful when combined with support by a medical specialist.  Our expert medical providers will work with you and your preferences to find the best plan for you, of course, with the fastest weight loss, and with a goal of the least amount of hunger.

Benefits of Intermittent Fasting

  • Weight Loss
  • May help medical conditions like obesity, diabetes, cardiovascular disease cancers and neurologic disorders
  • Improves glucose regulation
  • Increases cellular stress resistance
  • Suppresses inflammation

Intermittent Fasting: What and Why

  • Fasting: a very low-calorie day, done as infrequently as once weekly or as often as every other day. The meal plan contains up to 700 calories daily on fasting days. We have chosen to use 600 calories to provide complete nutrition, including protein, electrolytes, vitamins, mineral, and essential fatty acids.  The use of medical meal replacements on fasting days helps to ensure maintenance of muscle mass and prevention of malnutrition.  The plan for non-fasting days is individualized to meet your needs, and can consist of a partial meal replacement plan or all whole food, or a combination   People who do prolonged fasting on their own may face serious health risks.
  • Monitoring is done by your medical provider (physician or nurse practitioner), and if needed weight loss medications are used to manage hunger, irritability, and concentration.
  • Behavior classes help give you the tools to become a weight manager for life.
  • Physical activity counseling for mental and physical benefit
  • When at goal: The Active Maintenance Program. You will have a long-term plan to keep your weight in the healthy range

Will You Benefit from Intermittent Fasting?

There is no single diet that works best for everyone.  Many of our patients do best on continuous low-calorie diet, such as an 800 calorie full meal replacement plan, or a partial plan with some meal replacements and some whole food.  Finally, some do best on a low-carbohydrate meal plan.  For the greater population, studies have shown that IF is no better and no worse than continuous low calorie diets.  As experts in obesity medicine, we can often predict the best and safest approach for you, given your medical history, and past results with dieting.  Studies support the combination of the best meal plan, medical support, education, long-term accountability, and anti-obesity medications results in the most dramatic and sustained weight loss.

Time restricted feeding (TRF) consists of limiting eating to a window during the day has led to modest weight loss and improvements in metabolic parameters, but further studies are needed.  In our experience, the 5:2 36 hour intermittent fast offers better promise than TRF.

Interested in more detailed information about Intermittent fasting?  Read our blog post: Yes! Intermittent Fasting Works.


  • NEJM 381;26 Dec 26, 2019.   Effects of Intermittent Fasting on Health, Aging and Disease by Rafael de Cabo Ph.D. and Mark P. Mattson Ph.D.
  • Longo VD and Mattson MP. Fasting: Molecular Mechanisms and Clinical Applications. Cell Metabolism. 2014;19(2):181-192.
  • Varady KA, Hellerstein MK. Alternate-day fasting and chronic disease prevention: a review of human and animal trials. Am J Clin Nutr. 2007;86:7–13.
  • Halberg N, Henriksen M, Soderhamn N, et al. Effect of intermittent fasting and refeeding on insulin action in healthy men. J Appl Physiol. 2005;99:2128–2136.
  • Lihn AS, Pederson SB, Richelsen B. Adiponection: action, regulation and association to insulin sensitivity. Obes Rev. 2005;Feb 6(1):13-21.
  • Heilbronn LK, Smith SR, Martin CK, Anton SD, Ravussin E. Alternate-day fasting in nonobese subjects: effects on body weight, body composition, and energy
    metabolism. Am J Clin Nutr. 2005;81:69–73.