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Immune System Boosters

Updated: Jan 21, 2022



Many supplements including vitamins and minerals have the potential to interact with your medications. Always seek advice from a medical professional like your physician or a registered dietitian before taking any new supplements.


Vitamin C

Vitamin C is essential for human survival and must be obtained from our diet. Dietary sources include various fruits and vegetables, particularly citrus fruits such as oranges.


Some medical professionals recommend 200 mg daily to prevent COVID-19 and other respiratory tract infections, or up to 2000 mg twice daily at the onset of symptoms to improve recovery. There is no strong evidence to support the effectiveness of vitamin C for COVID-19.


Vitamin C is generally considered safe; however, high doses can cause abdominal cramps, esophagitis, heartburn, headache, diarrhea, nausea, vomiting. Kidney stones have been reported in those prone to kidney stones. Adverse effects are more likely to occur at doses above the tolerable upper intake level of 2000 mg daily.





Vitamin D

Vitamin D is an essential fat-soluble vitamin. Vitamin D is found in dietary sources, such as fish, mushrooms, eggs, milk and fortified cereals. It is also made in the skin through exposure to sunlight.


Some medical professionals recommend taking vitamin D 5000 IU daily to reduce the risk for COVID-19. These doses are likely safe for most adults, but there is no strong evidence to support the effectiveness of vitamin D for COVID-19.





Zinc

Zinc is a mineral and an essential nutrient and must be consumed regularly through the diet. Zinc deficiency can result in short stature, hypogonadism, reduced ability to taste food, and anorexia. Common dietary sources of zinc include seafood, red meat, and poultry. There is no good evidence to support using zinc for COVID-19.


Too much zinc might cause nausea, vomiting, loss of appetite, stomach cramps, diarrhea, and headaches. Taking too much zinc over a long period of time can cause low copper levels, lower immunity, and low levels of HDL "good" cholesterol.








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Disclaimer:

This information that should not take the place of medical advice. We encourage you to talk to your healthcare providers (doctor, registered dietitian, pharmacist, etc.) about your interest in, questions about, or use of dietary supplements and what may be best for your overall health.


Interested in a tailored nutrition plan to support your immune health?

Supplements can be tricky so be sure to book an appointment with one of our dietitians today to find out what food scan boost your immune system and what supplements (if needed) are safe to consume.



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