Why Being Underweight May Increase Your Risk of Frequent Colds - Nutrition

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Being underweight can make one more susceptible to colds and result in poor physical stamina?


Hello, I am currently 22 years old, with a height of 157.43 cm and a weight of 44.1 kg, resulting in a BMI of 17.9 and a body fat percentage of 24.7.
My basal metabolic rate is 1043 kcal.
Although my metabolic rate is low, I am still somewhat underweight.
My main concern is that I often catch colds and take a long time to recover.
After a cold, my weight tends to decrease slightly.
I previously had hyperthyroidism, but my current follow-ups show that everything is within the normal range.
I practice yoga or exercise about 3 to 4 times a week for approximately 30 minutes each session.
I would like to know if my approach is correct.
Thank you!

Lin, 20~29 year old female. Ask Date: 2016/07/29

Dr. Shi Guimei reply Nutrition


Hello! Currently, you are exercising regularly, which is beneficial for your health.
In terms of diet, it is essential to maintain a balanced diet, ensuring adequate intake of calories and protein.
Try to consume natural and diverse food sources.
Avoid staying up late, as well as smoking and drinking alcohol.
Additionally, you may consider visiting the Traditional Chinese Medicine department at a hospital to adjust your constitution, which should also be helpful.
Wishing you health and happiness! Sincerely, Dietitian Shih Kuei-Mei, Nutrition Department, Taoyuan General Hospital, Ministry of Health and Welfare.

Reply Date: 2016/07/29

More Info


Being underweight can indeed increase your risk of frequent colds and other infections, and there are several reasons for this. First, let's discuss the relationship between body weight, immune function, and overall health.

1. Nutritional Deficiencies: Individuals who are underweight often have inadequate nutritional intake, which can lead to deficiencies in essential vitamins and minerals that are crucial for a healthy immune system. For example, vitamins A, C, D, E, and minerals like zinc and iron play significant roles in immune function. A lack of these nutrients can impair your body's ability to fight off infections, making you more susceptible to colds.

2. Body Fat and Immune Response: Body fat is not just a storage depot for energy; it also plays a role in the immune system. Adipose tissue produces various hormones and cytokines that can influence immune responses. Individuals with low body fat may have a diminished capacity to mount an effective immune response, which can lead to increased susceptibility to infections.

3. Stress and Recovery: Being underweight can also be associated with higher levels of physical stress on the body. When the body is under stress, it can divert resources away from the immune system to deal with other physiological needs. This can lead to a slower recovery from illnesses, including colds.

4. Thyroid Function: You mentioned having a history of hyperthyroidism, which can also affect your metabolism and overall health. While your thyroid levels are currently normal, any fluctuations can impact your weight and energy levels. Hyperthyroidism can lead to weight loss and increased metabolism, which may further compromise your immune system if not managed properly.

5. Physical Activity: Engaging in regular physical activity, such as yoga or other forms of exercise, is beneficial for overall health and can help boost your immune system. Exercise can improve circulation, enhance immune function, and reduce stress levels. However, it's essential to balance exercise with adequate nutrition to ensure your body has the necessary resources to recover and maintain a healthy immune response.

6. Rest and Recovery: Adequate sleep is also crucial for immune function. During sleep, the body repairs itself and produces cytokines, which are proteins that help fight infections and inflammation. If you are not getting enough restorative sleep, it could further compromise your immune system.


Recommendations:
- Nutritional Assessment: Consider consulting with a registered dietitian to evaluate your dietary intake and ensure you are meeting your nutritional needs. They can help you develop a meal plan that includes a variety of foods rich in essential vitamins and minerals.

- Weight Management: If you are concerned about being underweight, discuss with a healthcare provider about strategies for healthy weight gain. This may include increasing your caloric intake with nutrient-dense foods rather than just high-calorie junk foods.

- Monitor Thyroid Function: Continue to have regular check-ups to monitor your thyroid function, especially since you have a history of thyroid issues.

- Stress Management: Incorporate stress-reducing activities into your routine, such as mindfulness, meditation, or gentle yoga, which can help improve your overall well-being and immune function.

- Hydration and Sleep: Ensure you are staying well-hydrated and getting enough sleep each night to support your immune health.

In conclusion, being underweight can indeed increase your risk of frequent colds due to various factors, including nutritional deficiencies, immune response, and overall health. By focusing on a balanced diet, regular exercise, and adequate rest, you can improve your immune function and overall health. If your symptoms persist, it is essential to consult with a healthcare professional for further evaluation and personalized recommendations.

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