COVID: Does it Cause Weight Loss?

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As the COVID-19 pandemic swept across the globe, it brought with it an array of health complications and concerns. One such issue that has been increasingly observed is the impact of COVID-19 on weight.

According to a study published in the American Journal of Clinical Nutrition in 2021, there was a noticeable change in body weight among individuals who contracted COVID-19. This phenomenon has sparked numerous discussions among healthcare professionals and researchers. In this article, we will explore in detail how COVID-19 affects weight loss, the underlying mechanisms through which this occurs, and various strategies that can be employed to mitigate severe weight loss associated with the virus.

How COVID-19 Leads to Weight Loss

The Role of Infection

First and foremost, it is essential to understand that weight loss during a COVID-19 infection can be attributed to the virus's direct and indirect effects on the body. An article in the Journal of Infection and Public Health indicated that individuals with severe COVID-19 symptoms tend to lose more weight than those with mild symptoms. One of the main reasons behind this is the body’s response to fighting off the virus.

Metabolic Changes

As the body fights an infection, it experiences metabolic changes. The basal metabolic rate (BMR) - which is the number of calories the body needs to perform basic functions like breathing and circulating blood - tends to increase during infections.. The increased BMR is a result of the immune system working in overdrive to combat the virus. This leads to a higher caloric requirement, and if this requirement is not met, it can result in weight loss. Moreover, the production of cytokines, which are signaling molecules that mediate and regulate immunity and inflammation, also increases. This increase in cytokine production is often associated with fatigue and muscle wasting, further contributing to weight loss.

Loss of Appetite and Taste

Another reason for weight loss during a COVID-19 infection is the loss of appetite and taste. A study published in the European Archives of Oto-Rhino-Laryngology in 2020 showed that over 60% of COVID-19 patients reported experiencing anosmia (loss of smell) and ageusia (loss of taste), which contributed to decreased appetite and subsequent weight loss. These sensory losses can make food seem less appealing and cause patients to eat less than they normally would. Furthermore, the inflammation caused by the virus can send signals to the brain to reduce hunger as the body focuses on fighting the infection.

Gastrointestinal Symptoms

Gastrointestinal symptoms like nausea, vomiting, and diarrhea, which are relatively common in COVID-19 patients, can also contribute to weight loss. These symptoms can cause a reduced intake of food and nutrients, and increased loss of fluids and electrolytes. Nausea and vomiting can make it difficult for patients to keep food down, while diarrhea can prevent the proper absorption of nutrients from the food.

Respiratory Distress and Increased Work of Breathing

COVID-19 primarily affects the respiratory system, and patients often experience respiratory distress. The increased work of breathing, coupled with a compromised respiratory system, can lead to the burning of additional calories. This elevated caloric expenditure, especially if not matched with appropriate caloric intake, can contribute to weight loss.

Psychological Factors

The psychological impact of COVID-19 can also play a role in weight loss. Anxiety and depression, common mental health issues during infections and pandemics, can lead to decreased appetite and disinterest in food. For some individuals, mental health struggles can have a significant impact on eating habits.

Understanding the Implications

The weight loss experienced by individuals with COVID-19 can have numerous implications on their overall health and recovery. Weight loss, especially when rapid and significant, can lead to muscle wasting and a decrease in immunity. This makes the body more susceptible to secondary infections and can prolong the recovery process. Furthermore, it's essential to recognize the multi-faceted nature of the implications, which can be physiological, psychological, and social.

Strategies to Mitigate Severe Weight Loss

Understanding that weight loss can be a significant issue for individuals infected with COVID-19, it becomes imperative to consider strategies that can help mitigate this concern. Addressing the weight loss related to COVID-19 involves both medical interventions and nutritional support.

Nutritional Support

Adequate Caloric Intake

Ensuring an adequate intake of calories is crucial. The increased BMR during infection necessitates a higher caloric intake. Individuals should focus on consuming nutrient-dense foods that can provide the body with the energy it needs to fight the virus. The Academy of Nutrition and Dietetics recommends focusing on a balanced diet that includes a variety of foods from all food groups.


Staying hydrated is essential, especially for patients experiencing gastrointestinal symptoms like vomiting and diarrhea, as these can cause significant fluid loss. Consuming broths, soups, and drinking water regularly can help maintain hydration levels.


Due to loss of appetite and taste, it may be challenging for some individuals to consume adequate nutrients through food. In such cases, nutritional supplements can be helpful. Consulting a healthcare provider for advice on appropriate supplements, such as vitamins and minerals, can be beneficial.

Medical Interventions

Medication to Manage Symptoms

In cases where gastrointestinal symptoms are severe, medications might be necessary to manage these symptoms. Anti-emetic medications can help control nausea and vomiting, while antidiarrheal medications can be useful for managing diarrhea. It’s important to consult a healthcare provider for the appropriate medications and dosages.

Monitoring and Follow-up

Regular monitoring of weight and other vital signs is important for individuals suffering from COVID-19, especially those experiencing significant weight loss. Regular follow-ups with healthcare providers can help in timely identification of any complications and implementing necessary interventions.

Psychological Support

Managing Stress and Anxiety

The mental health aspect cannot be overlooked, as stress and anxiety related to the infection can also contribute to loss of appetite and, consequently, weight loss. Engaging in stress-relief activities, talking to friends or family, or consulting a mental health professional can be helpful in managing stress and anxiety during this period.

Role of Physical Activity in Managing Weight Loss

Physical activity plays a significant role in managing weight during and after a COVID-19 infection. Though it might not be advisable for patients with severe symptoms to engage in strenuous exercises, incorporating mild physical activities can be beneficial as the patient starts to recover.

Gentle Exercises

Gentle exercises like walking or stretching can help in maintaining muscle mass, which might be lost during the infection due to reduced physical activity and dietary intake. A study in the International Journal of Behavioral Nutrition and Physical Activity highlights the importance of physical activity in improving the quality of life and physical function in patients recovering from infections.

Physical Therapy

For individuals who experienced severe COVID-19 symptoms and have had a significant loss of muscle mass, physical therapy might be necessary. Physical therapists can guide patients through specific exercises that can help in regaining strength and improving overall physical health.

Importance of Tailored Nutritional and Exercise Plans

Every individual's experience with COVID-19 can vary, and so can the impact on weight. It is essential to understand that there is no one-size-fits-all approach to managing weight loss due to COVID-19.

Individualized Nutritional Plans

Working with a dietitian to create an individualized nutritional plan can be highly beneficial. A dietitian can take into account the person's medical history, the severity of the COVID-19 infection, and specific nutritional needs to create a plan that can help in managing weight effectively.

Customized Exercise Regimens

Similarly, an exercise regimen should be customized according to the individual's health status. A healthcare provider or physical therapist can provide guidance on what type of exercises are suitable, depending on the severity of the infection and the individual's general health.

Summary and Conclusion

Throughout the course of the COVID-19 pandemic, it has been observed that the virus can cause significant weight loss in infected individuals. This weight loss can be attributed to various factors including metabolic changes, loss of appetite and taste, gastrointestinal symptoms, respiratory distress, and psychological effects. The body’s heightened metabolic rate while fighting the infection leads to a higher caloric requirement, which, if not met, results in weight loss. Additionally, common symptoms like nausea, vomiting, and diarrhea further contribute to decreased nutrient intake.

The implications of weight loss due to COVID-19 are multi-dimensional, affecting physiological, psychological, and social aspects of an individual’s life. Physiologically, there can be muscle wasting, immune suppression, and nutrient deficiencies. Psychologically, mood, mental health, and cognitive functions can be affected. Socially, individuals may face isolation and economic challenges.

Addressing these issues requires a comprehensive approach including nutritional support, psychological counseling, physical rehabilitation, and community support. Ensuring an adequate intake of nutrients, engaging in mild physical activities, availing psychological support, and staying connected with a support system are crucial steps in mitigating the adverse effects of weight loss during and after a COVID-19 infection.

In conclusion, the impact of COVID-19 on weight loss is profound and can have long-lasting effects on an individual's overall health and quality of life. It is imperative to approach this issue holistically, keeping in mind the physical, mental, and social well-being of the affected individuals.

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This blog post is for educational purposes only and does not constitute medical or other professional advice. Your specific circumstances should be discussed with a healthcare provider. All statements of opinion represent the writers' judgement at the time of publication and are subject to change. Phoenix and its affiliates provide no express or implied endorsements of third parties or their advice, opinions, information, products, or services.

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