Upcoming Event:

Hack your health

View details

Types of People Who Should Not Do Intermittent Fasting

author avatar Dr. Eric Berg 03/27/2024

While intermittent fasting is incredibly beneficial for most groups of people, some individuals should not partake.

Learn about what intermittent fasting is, the keto diet, their benefits, and who should not adopt fasting as an eating pattern.

Decoding Intermittent Fasting and the Ketogenic Diet

The ketogenic diet, or keto, is a low-carb, high-fat dietary regimen that transitions your body's energy source from glucose to fat. This metabolic state, known as ketosis, aids in weight loss and management of type 2 diabetes.

In contrast, intermittent fasting revolves around an eating pattern where you cycle between periods of easting and not eating. It doesn't dictate what foods you should consume but when they should be eaten.

Scientific studies have found that combining these two practices can result in improved insulin sensitivity and enhanced fat-burning capabilities for weight control purposes, among other health benefits.

Ketosis: The Cornerstone of Keto Diet

A vital aspect of the keto diet involves inducing a metabolic state called ketosis, wherein your body efficiently burns fats instead of carbohydrates for energy.

Contrary to popular belief about fats being detrimental, research findings indicate consuming healthy fats may improve heart health by reducing bad cholesterol (LDL) levels while increasing good cholesterol (HDL).

This process not only facilitates losing weight but also helps manage conditions like type 2 diabetes, which necessitates blood sugar level regulation.

Fasting Periods: An Essential Component Of Intermittent Fasting

The crux behind intermittent fasting lies in alternating between designated eating periods and extended fasting states devoid of or minimally inclusive calorie intake.

There are several methods, such as alternate-day fasting involving one day off food followed by normal eating the next day; time-restricted feeding like the 16/8 method with sixteen hours fasts broken by an eight-hour feeding window;

No matter which plan you choose, it's essential to remember that starting intermittent fasting requires careful consideration, considering individual health factors before diving headfirst into this lifestyle change.

Blue alarm clock on a table with low-carb foods

The Benefits of Intermittent Fasting

Intermittent fasting is an eating pattern that has gained significant attention in health and wellness. It involves alternating periods of eating and fasting, with schedules varying from 16-hour fasts to only eating one meal a day (OMAD).

The benefits extend beyond weight loss into improved insulin sensitivity, hormone regulation, anxiety management, and brain health enhancement.

Role of Intermittent Fasting in Hormonal Regulation

Hormones, which are essential for sustaining overall health and especially critical to women with conditions like PCOS or irregular menstrual cycles, are significantly impacted by intermittent fasting.

Fasted workouts are known to improve insulin sensitivity because when we're on an intermittent fasting plan, there's a substantial drop in our insulin levels, initiating the body's switch from carbohydrate-burning towards fat-burning mode during exercise sessions.

Glycemic Control through Intermitting Fasting

Apart from its effect on regulating hormones like ghrelin (the hunger hormone) and leptin (the satiety hormone), another notable advantage is how it helps stabilize blood sugar levels, thereby reducing cravings. This is especially true among individuals suffering from hypoglycemia.

This systematic way of starting intermittent fasting allows them to manage their glycemic index better under medical supervision while enjoying small meals during the non-fasting window without excessively restricting calorie intake compared to continuous calorie restriction diets.

Intermittent Fasting: Who Should Refrain?

The intermittent fasting plan has gained popularity due to its potential benefits in weight loss, insulin resistance management, and improved insulin sensitivity. However, it is not suitable for everyone.

Pregnant Women and Nursing Mothers

Two groups that should be cautious when considering starting intermittent fasting are pregnant women and nursing mothers. They require consistent nutrient intake throughout the day for their health and their child's growth and development.

Individuals with Neurodegenerative Conditions

People dealing with neurodegenerative conditions such as Alzheimer's or Parkinson's disease also need to approach this eating pattern carefully.

These diseases often cause significant weight loss, which makes maintaining a proper diet crucial rather than focusing on longer fasts or continuous calorie restriction associated with some types of intermittent fasting schedules.

Healthy Keto Diet: A Potential Aid for People with Eating Disorders

A low-carb, high-fat dietary regimen known as the ketogenic diet or "keto" may be beneficial for those with eating disorders. The keto diet may offer a potential benefit to those suffering from eating disorders such as anorexia or bulimia.

The structure of the keto diet itself might provide some relief from these conditions due to its emphasis on fats over carbohydrates, which may help create feelings of fullness after meals and potentially mitigate binge-eating behaviors.

A Gradual Approach: Starting With Three Balanced Meals Daily

To ensure sustainability and prevent triggering disordered food habits, those recovering from an eating disorder should consider starting their journey into this new nutritional paradigm by having three full meals each day before introducing intermittent fasting periods into their routine.

This initial phase provides time for physical and mental adjustments in response to changes in calorie intake patterns without causing undue stress or reverting to unhealthy behaviors associated with the condition.

Nutrient-Dense Foods Are Key

Beyond regulating meal frequency when adopting a healthy keto diet, focusing on nutrient-rich foods such as lean proteins (like fish), heart-healthy fats found in avocados, nuts & seeds, and non-starchy vegetables rich in fiber is critical.

These types of nourishing choices not only aid weight management but also guarantee adequate nutrition - often compromised among those battling eating disorders.

  1. Fish are excellent sources of protein, but they are also lower in fat than most meats.

  2. Poultry like chicken offers ample amounts of protein.

  3. Eggs deliver quality protein alongside other essential nutrients.

The Connection Between Hypoglycemia and Intermittent Fasting

Individuals with hypoglycemia often experience challenges in maintaining steady glucose levels. However, intermittent fasting may provide specific benefits for this group.

During an intermittent fast, the body switches its primary fuel source from glucose to stored fat through a process known as ketosis.

This occurs when insulin levels drop significantly during longer fasts, leading to more stable blood sugar levels, which could benefit those managing hypoglycemia.

Studies indicate that following an intermittent fasting plan can improve insulin sensitivity - cells become better at responding to insulin and absorbing glucose from the bloodstream.

Maintaining Blood Sugar Levels During Fasting Periods

Fasting periods require careful monitoring, especially if you have conditions such as hypoglycemia. Starting alternate-day fasting schedules without understanding their potential effects on your health is not advisable.

If you are considering starting intermittent fasting while dealing with hypoglycemic concerns, always consult a healthcare professional who can guide you based on specific needs before embarking upon this journey toward weight management.

They might suggest a shorter initial fasted state followed by a gradual increase in time between meals depending upon observed reactions.

Hypoglycemic Cravings And Intermittent Fasting

A common symptom related to low blood sugar is intense cravings, particularly for sugary foods or carbohydrates. These give quick energy boosts but cause subsequent crashes, creating an unstable cycle of fluctuating sugars.

Introducing a regular eating pattern through controlled meal plans helps break this vicious cycle, providing consistent energy sources and overall reduced cravings.

Using Intermittent Fasting to Manage Anxiety

Anxiety disorders are a prevalent mental health issue in the United States. While therapy and medication can be effective, lifestyle modifications like intermittent fasting have also shown potential for managing anxiety symptoms.

The principle of intermittent fasting is simple - cycling between periods of eating and not eating. This practice has been linked with several health benefits such as improved insulin sensitivity, weight loss, and enhanced brain function.

Diet's Influence on Managing Anxiety

A nutritious diet with vital nutrients is essential to physical and mental health. Consuming high-quality foods helps support mood regulation by facilitating optimal brain functioning.

Intermittent fasting can trigger ketosis, in which the body uses fat for energy instead of glucose. The neuroprotective effects of the ketones produced during this process may help alleviate anxiety symptoms.

Fats, B Vitamins & Potassium: Your Anti-Anxiety Allies

Incorporating healthy fats into meals when not observing fasts can positively impact the management of anxiety levels due to their significant role in hormone production, which influences mood stability.

Studies suggest that B vitamins aid neurotransmitter synthesis, which is crucial for regulating moods, while potassium-rich foods manage stress responses through calming nervous system activity.

These elements, combined with an appropriate alternate-day fasting plan, could potentially lead to marked improvements for individuals dealing with anxiety disorders.

Moderation Is Key: Gradual Implementation Of Intermittent Fasting

A slow start might be beneficial if you're new to starting intermittent fasting or previous attempts at dietary changes led to increased stress discomfort. Evidence shows gradual implementation often leads to more sustainable behavior change than abrupt shifts do.

This approach allows your body time to adjust gradually, minimizing any potential side effects of sudden transitions.

It's always advisable, though, before making significant dietary modifications, to consult a healthcare professional first to ensure the safety and effectiveness of the chosen regimen, considering individualized needs and circumstances.

Healthy Keto Eating Plan

Healthy Keto® is a beacon for those seeking weight loss without compromising their overall health and wellness. This plan underscores the importance of consuming nutrient-dense foods, not just focusing on rapid fat-burning or continuous calorie restriction typically associated with other diets.

Fostering Balance in Ketogenic Dieting

A vital aspect of the Healthy Keto strategy involves promoting healthy weight management through balanced nutrition rather than extended fasting periods or drastic carbohydrate reduction.

It encourages the intake of high-quality fats, moderate proteins, and minimal carbohydrates - an eating pattern that fuels efficient body function while controlling insulin levels.

Instead of relying heavily on processed options often found in traditional diets, it prioritizes foods rich in essential vitamins and minerals that help maintain improved insulin sensitivity during longer fasts between meals.

Nutrient-Density Over Calorie Counting

In contrast to many conventional diet plans focused primarily on counting calories or imposing strict intermittent fasting schedules, Healthy Keto emphasizes the quality over quantity principle when it comes to food consumption.

The objective here is achieving satiety from fewer but nutrient-rich calories so you don't feel deprived despite being in a state conducive to fat loss.

This unique perspective aids your journey into starting intermittent fasting as part of your daily routine without causing undue stress about skipping breakfast or going hungry due to smaller meals throughout the day.

Taking up such an eating regimen can be instrumental, especially if one suffers from conditions like type 2 diabetes, where managing blood sugar spikes becomes crucially important.

Sleep Disorders & Intermittent Fasting - What You Need To Know

When it comes to snooze issues such as apnea, intermittent fasting may not be the initial remedy that pops into your head. However, this eating pattern can significantly impact your overall health and well-being.

The relationship between these two seemingly unrelated concepts is more intertwined than you might think. Let's delve into how intermittent fasting works for various sleep disorders.

Resetting Your Internal Clock Through Intermittent Fasting

One's human system is run by an inside timepiece called the circadian beat. This biological process regulates when we feel awake or sleepy.

Research suggests that aligning our eating periods with daylight hours helps reinforce this natural cycle, leading to improved quality of restful slumber at night.

This synchronization is particularly beneficial for those suffering from insomnia or other sleeping irregularities by helping reset their disrupted circadian rhythms through well-timed feeding windows during waking hours only.

Tackling Insulin Resistance With Intermittent Fasting

In many cases of poor sleeping habits, an underlying issue lies in insulin resistance. Eating late into the night without observing any fasting state keeps our bodies constantly producing insulin, causing elevated levels even while not consuming food.

Over time, this leads to metabolic syndrome conditions like type 2 diabetes and heart disease.

Studies show, however, that longer fasts provided by starting intermittent fasting schedules can significantly improve insulin sensitivity, thus reducing risks associated with chronic diseases.

Extended periods with no calorie intake allow for times when insulin levels drop substantially.

Fasted Workouts And Sleep Quality

An exciting aspect worth considering within alternate-day fasting plans is workouts performed in a fasted state early in the morning after breaking overnight long-duration fasts.

This practice promotes fat burning since lower glycogen stores force your body to use stored fat as an energy source, aiding effectiveness.


While intermittent fasting and the ketogenic diet offer numerous health benefits, they may not be suitable for everyone. Pregnant women, nursing women, and individuals with eating disorders are not advised to take part in intermittent fasting.

Understanding these eating patterns is crucial, and consulting a healthcare professional before adopting them is advised.

It's essential to approach them with moderation, balance, and personalized guidance to ensure they align with individual health needs and goals.

Healthy Keto Guide for Beginner

FREE Keto Diet Plan