16:8 Fasting. A Beginner's Guide to Intermittent Fasting
Weight loss

16:8 Fasting: A Beginner's Guide to Intermittent Fasting

Do you want to improve your health and lose weight? You may have heard of the 16:8 intermittent fasting method. This approach involves limiting your calorie intake to a specific time window, with a fasting period of 16 hours and an eating period of 8 hours.

Intermittent fasting has become very popular in recent years, and for good reason. Studies have shown that it can lead to weight loss, improved metabolic health, and a reduced risk of chronic diseases such as heart disease and diabetes. The 16:8 fasting method is one of the most popular forms of intermittent fasting, it is an excellent choice for beginners embarking on their fasting journey.

Understanding the basics of fasting

Understanding the Basics

As said above, this type of intermittent fasting involves consuming all your daily calories within an eight-hour window and fasting for the remaining 16 hours. 

During the 16-hour fasting period, you can drink water, black coffee, or other calorie-free beverages. You can also consume supplements like vitamins or minerals, as long as they do not contain any calories. Then, during the 8-hour eating window, you can have two or three meals, depending on your preference and caloric needs.

One of the benefits of this type of intermittent fasting is that it is relatively easy to follow. You do not have to worry about counting calories or placing restrictions on specific foods. Instead, you focus on when you eat, rather than what you eat. This develops a healthy relationship with food and reduces the risk of binge eating.

Another benefit is that it can help you lose weight and reduce body fat. By limiting your caloric intake to 8 hours per day, you naturally consume fewer calories overall. Additionally, fasting triggers a metabolic response in your body that can increase fat burning and improve insulin sensitivity.

Health Benefits

One of the main reasons people turn to intermittent fasting is for weight loss. Studies have shown that fasting can lead to weight loss by reducing calorie intake and increasing fat burning. According to a study published in Molecular and Cellular Endocrinology, a person weighing slightly over 90 kg could lose 5 percent of their total body weight in 10 weeks on average. 

But the benefits of intermittent fasting extend far beyond just shedding a few pounds.

Blood Sugar Control

Intermittent fasting can also help regulate blood sugar levels, which is especially important for people with type 2 diabetes. Research suggests that fasting can improve insulin sensitivity and lower blood sugar levels. In one study, people who followed an intermittent fasting diet for six months experienced a significant reduction in fasting blood sugar levels.

Blood Pressure Regulation

Another benefit is blood pressure regulation. High blood pressure is a significant risk factor for heart disease, stroke, and a wide range of other health problems. Research has shown that fasting can help lower blood pressure, which can reduce the risk of these conditions.

Reduced inflammation

Fasting has also been shown to reduce markers of inflammation in the body. Chronic inflammation has been linked to the development and progression of numerous diseases. These include heart disease, certain types of cancer, and autoimmune disorders where the body's immune system mistakenly attacks its own healthy tissues. 

Improved Brain Function

Intermittent fasting has been linked to improved brain function and the prevention of neurodegenerative diseases such as Alzheimer's and Parkinson's. Studies have shown that fasting can stimulate the production of a protein called BDNF, which plays a role in promoting brain health.

Fasting and improved brain function

The Role of Autophagy in Fasting

Autophagy is the process by which your body's cells break down and recycle old or damaged components. This process is crucial for maintaining healthy cells and preventing abnormal cell growth, which can lead to diseases like cancer. 

Studies have shown that fasting can induce autophagy in your cells, triggering the recycling of old or damaged cell components. During the fasting period, your body is forced to use stored energy, including fat stores, to fuel your body's functions. This energy depletion can trigger autophagy, leading to the recycling of old or damaged cell components.

By promoting autophagy, you can help prevent abnormal cell growth and promote the growth of healthy cells. This can have potential benefits for preventing diseases like cancer and promoting overall health and longevity.

Diet and Nutrition during fasting

One of the main benefits of fasting is calorie restriction. However, it is important to consume  enough calories and nutrients during the eating window to maintain your health.  

To ensure that you are getting enough calories, make sure that you are consuming a variety of nutrient-dense foods. This includes plenty of fruits, vegetables, whole grains, and lean proteins.

In addition to consuming enough calories, it is also important to get enough healthy fats. Healthy fats, such as those found in nuts, seeds, and avocados, are important for brain function, hormone production, and cell growth.

Fasting can be a great way to improve your health and lose weight. By following a balanced diet during your eating window, you can ensure that you are getting all the nutrients your body needs to function at its best.

Fasting, a great way to improve your health

Potential Side Effects 

Intermittent fasting is known to have several health benefits, but it may also have some side effects. 

Hunger and Cravings

Reducing your calorie intake or going long periods without food can lead to hunger and cravings. This is the most common side effect of intermittent fasting. It can be challenging to stick to the eating window, especially during the first few days of starting the diet. Drinking water or other non-caloric beverages can help curb hunger and cravings.

Weight Gain

Some people may experience weight gain when they first start intermittent fasting. This can be due to the tendency to overeat during the eating window or consuming high-calorie foods. Maintaining a balanced diet and avoiding excessive calorie intake during the eating period is essential.

Low Energy Levels

Fasting can also lead to low energy levels, especially during the initial phase of starting the diet. This is because your body is adjusting to using stored energy instead of constantly consuming food for fuel. Staying hydrated and getting enough rest can help combat this side effect.

Headaches and Lethargy

Depending on the length of the fasting period, some people may experience headaches, lethargy, and crankiness. This is because the body is adjusting to the new eating pattern. It is essential to listen to your body and stop fasting if you experience any severe symptoms.


Some people may experience constipation during intermittent fasting. This is because the body is not getting enough fiber, which is essential for healthy bowel movements. It is recommended to eat plenty of fruits, vegetables, and whole grains during the eating window to avoid constipation.

Underlying Health Conditions

Intermittent fasting may not be suitable for everyone. Especially those with underlying health conditions such as diabetes, eating disorders or low blood pressure should consult a doctor before starting this diet. Fasting can affect blood sugar levels and blood pressure, which can be dangerous for people with these conditions.

Eating Disorders

Intermittent fasting can trigger eating disorders in some people, especially those with a history of disordered eating. It is essential to be mindful of your thoughts and feelings towards food and your body. If you experience any negative thoughts or feelings, it is best to stop fasting and seek professional help.

Potential side effects of fasting

Getting started with intermittent fasting

If you are interested in trying intermittent fasting, it is essential to do your research and consult a healthcare professional before starting. Here are some tips:

Choose your time window

To get started, it is best to pick an 8-hour window for your daily meals. There are various options  such as eating between noon and 8 p.m. or between 9 a.m. and 5 p.m. No matter what time frame you choose, be sure to set timers to remind you when to start and stop eating. Do not be afraid to experiment and find the time frame that works best for your schedule and lifestyle.

The Power of Whole Foods

Maximizing the potential health benefits of your diet requires a commitment to consuming nutrient-rich whole foods and beverages. Not only do these foods help support a healthy weight, but they also provide a wealth of essential vitamins and minerals. To ensure you are getting the most out of your meals, try to balance each one with a variety of whole foods that include fruits, veggies, whole grains, healthy fats, and protein sources. 

Staying hydrated

Water is essential for overall health and can also help curb hunger and cravings while fasting. Drink plenty of water throughout the day to stay hydrated and avoid overeating during the eating window. Water is also important for maintaining healthy bowel movements, which can be affected by fasting. Calorie-free beverages like water and unsweetened tea and coffee are allowed during fasting periods. 

Start slow and be patient

Intermittent fasting can take time for your body to adjust, so it is important to start slow and be patient. Do not jump into longer fasts right away, and be aware of any negative side effects. It may take a few weeks or even months for your body to adapt fully to the new eating pattern. Listen to your body and make adjustments as needed. 


In conclusion, 16:8 intermittent fasting is a popular method of time-restricted eating that restricts your food intake to an 8-hour window and fasts for the remaining 16 hours. This practice has been shown to support weight loss, improve blood sugar, and increase metabolic health. 

Fasting may help with weight loss because it allows insulin levels to fall low enough that our body will use fat for fuel. During the fasting period, your body enters a prolonged state of ketosis, where your metabolism begins burning fat instead of blood sugar stores, helping you lose weight.

However, it is important to note that fasting may not be suitable for everyone, especially those with underlying health conditions or pregnant women. Consult your healthcare provider before starting any new diet or fasting regimen. 

Overall, intermittent fasting can be an effective method for weight loss and improving overall health. 

Want to know more? Check out Eat-Stop-Eat and The Warrior Diet - two of the most popular forms of intermittent fasting. Happy fasting!