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CE Test

The Safety and Efficacy of Intermittent Fasting for Weight Loss

doi: 10.1097/NT.0000000000000452


  • Read the article on page 270.
  • The test for this CE activity must be taken online. Tests can not be mailed or faxed.
  • You will need to create (its free!) and login to your personal CE Planner account before taking online tests. Your planner will keep track of all your Lippincott Professional Development online CE activities for you.
  • There is only one correct answer for each question. A passing score for this test is 14 correct answers. If you pass, you can print your certificate of earned contact hours and access the answer key. If you fail, you have the option of taking the test again at no additional cost.
  • For questions, contact Lippincott Professional Development: 1-800-787-8985.

Registration Deadline: September 2, 2022

Continuing Education Information for Registered Dieticians and Dietetic Technicians, Registered:

The test for this activity for dietetic professionals is located online at Lippincott Professional Development (LPD) is a Continuing Professional Education (CPE) Accredited Provider with the Commission on Dietetic Registration (CDR), provider number LI001. Registered dietitians (RDs) will receive 1.0 continuing professional education units (CPEUs) for successful completion of this program/material, CPE Level 2. Dietetics practitioners may submit evaluations of the quality of programs/materials on the CDR website: LPD is approved as a provider of continuing education for the Florida Council for Dietetics and Nutrition, CE Broker # 50-1223.

Continuing Education Information for Nurses:

Lippincott Professional Development will award 1.5 contact hours for this continuing nursing education activity.

The test for this activity for nurses is located at

Lippincott Professional Development is accredited as a provider of continuing nursing education by the American Nurses Credentialing Center’s Commission on Accreditation.

This activity is also provider approved by the California Board of Registered Nursing, Provider Number CEP 11749 for 1.5 contact hours. Lippincott Professional Development is also an approved provider of continuing nursing education by the District of Columbia, Georgia, and Florida, CE Broker #50-1223.

Disclosure Statement:

The author and planners have disclosed no potential conflicts of interest, financial or otherwise.


  • The registration fee for this test is $17.95.


GENERAL PURPOSE: To gain knowledge about the safety and efficacy of using intermittent fasting (IF) for achieving weight loss by reviewing relevant literature and study findings.

LEARNING OBJECTIVES: After completing this continuing education activity, you should be able to:

1. Explain the weight gain cycle, concepts such as hunger and appetite, and the physical effects that occur with IF.

2. Differentiate between the main types of IF diets regarding use, benefits, and disadvantages.

3. Summarize study findings regarding weight loss and safety and efficacy of IF diets.

  1. During the second stage of fasting, which lasts up to 18 hours, the fuel source that is used by the body is
    1. fat.
    2. alanine.
    3. glycogen.
    4. lactic acid.
  2. Which stage of fasting causes a metabolic switch that involves a mobilization of fat and then metabolizing it into fatty acid–derived ketones to provide energy?
    1. initial stage of fasting
    2. second stage of fasting
    3. third stage of fasting
    4. final stage of fasting
  3. When explaining the difference between hunger and appetite to a patient desiring weight loss, the provider explains that appetite is the
    1. desire to eat.
    2. physiological urge to eat.
    3. physiological anticipation of eating.
    4. drive to consume pleasure-inducing food.
  4. When explaining the weight gain cycle to an individual with obesity, the provider describes the concept of hedonic hunger, which stems from the hormonal regulation of leptin and
    1. gastrin.
    2. insulin.
    3. ghrelin.
    4. cortisol.
  5. The periodic fasting diet is explained to an individual with hypertension, high lipid levels, and type 2 diabetes. The provider states that this type of IF
    1. has beneficial effects on lipid profiles.
    2. is safe to use for people with type 2 diabetes.
    3. has shown conflicting findings on effects on blood pressure.
    4. can lead to increases in fasting glucose and insulin resistance.
  6. When counseling an individual about alternate-day fasting, the provider explains that this method of IF
    1. has an increased risk of disordered eating.
    2. is more effective when combined with exercise.
    3. increases cardiovascular and metabolic biomarkers.
    4. includes fasting for a 16-hour period and then eating food for 8 hours per day.
  7. The older adult individual desires to try a popular IF diet that he heard improves sleep, is feasible for older adults, and leads to weight loss, which is called the
    1. juice fasting diet.
    2. fast-mimicking diet.
    3. alternate-day fasting diet.
    4. time-restricted feeding diet.
  8. An adult male has been on a juice fasting diet because his wife thought it would improve their health. The provider explains to him that
    1. studies show improvement in sleep.
    2. this diet reduces C-reactive protein levels.
    3. it is associated with a significant decrease in triglycerides.
    4. there is no scientific evidence to support any health claims on this diet.
  9. An adult female explains that she will begin a religious assumption fast that includes abstaining from dairy products, eggs, and meat for 15 days, which is a type of
    1. Jewish fast.
    2. Daniel fast.
    3. Ramadan fast.
    4. Greek Orthodox fast.
  10. When a 3-week study used the alternate-day fasting diet for overweight men and women, it was found that both overweight men and women showed a (an)
    1. impaired glucose uptake.
    2. improved insulin sensitivity.
    3. remarkable decrease in insulin response.
    4. exacerbation of insulin resistance in skeletal muscle.
  11. Clinical trials using periodic fasting and time-restricted feeding showed that this type of fasting may
    1. increase atherosclerosis.
    2. reduce insulin sensitivity.
    3. increase cardiovascular risk factors.
    4. decrease the risk of coronary artery disease.
  12. A study investigating IF included overweight men and women using either the continuous energy restriction diet or the periodic fasting diet and found they had
    1. better nutrition.
    2. poor eating behaviors.
    3. an average of 14-kg weight loss.
    4. increased their total cholesterol levels.
  13. A 2-week study using the time-restricted feeding diet investigated if there was an association between the IF regimen and peripheral glucose uptake and hepatic insulin sensitivity. The study showed
    1. no association.
    2. a small increase in peripheral glucose uptake.
    3. a significant decrease in hepatic insulin sensitivity.
    4. improvement in both peripheral glucose uptake and hepatic insulin sensitivity.
  14. A meta-analysis on the effectiveness of IF diets for patients with diabetes, patients with prediabetes, and healthy individuals found that while on the IF diets, fasting blood glucose levels
    1. were higher in diabetics.
    2. decreased for healthy individuals.
    3. were lowered in patients with diabetes and patients with prediabetes.
    4. increased for patients with prediabetes and healthy individuals.
  15. A patient asked the provider about IF with preexisting disorders. The provider explained that there were some small-scale clinical studies that suggest that IF may have
    1. beneficial effects for bone health.
    2. a disadvantage for those with chronic pain.
    3. minor beneficial effects on mood disorders.
    4. slightly increased adverse effects of chemotherapy agents.
  16. Two studies that tested the metabolic effects of IF on nonobese subjects over 14 to 21 days with a high dietary intake on nonfasting days indicated that participants
    1. had complained of persistent hunger with IF.
    2. experienced hypophagia when allowed to eat again.
    3. maintained a normal appetite without hunger with IF.
    4. ate normal helpings of food when allowed to eat again.
  17. A female patient has been breastfeeding for the past 3 months and is trying to lose weight. She asks her provider about IF dieting. The provider states that using an IF diet
    1. is not recommended for breastfeeding women.
    2. is a good diet for her to use for health and weight loss.
    3. has no evidence-based data for making any recommendations.
    4. has no contraindications for lactating women, so it should be fine.
  18. The overweight patient begins an IF diet, but wants to minimize loss of fat-free mass stores. The provider explains that on non–energy-restricted days, it is helpful to
    1. increase dietary fat.
    2. reduce fiber intake.
    3. increase protein intake.
    4. reduce carbohydrates.
  19. The provider talks with a small group of older adults in an independent living community. They ask about IF dieting, and the provider explains that IF has been linked to
    1. impaired sleep quality.
    2. greater athletic performance.
    3. helping individuals with eating disorders.
    4. greater health benefits for pregnant women.
  20. The provider speaks to a group of college students asking about weight loss and IF diets. The provider explains that 2- to 12-week trials concluded that IF resulted in
    1. weight gain due to changes in BMI.
    2. not enough data to show any consistent loss in weight.
    3. weight loss regardless of changes in overall calorie intake.
    4. no changes in weight regardless of following the IF diet directions.
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