Can Vitamin C Prevent or Treat COVID-19?

Since years ago, vitamin C has gained its popularity to be used for various functions from prevention of illnesses, alleviating symptoms for illnesses, and even in the cosmetics industry for skin care purposes. It has becoming popular after the Nobel prized scientist Linus Pauling started to consumed it (1). Following that there are many studies conducted on vitamin C and many people started to question its effectiveness and there are also many people who started to consume vitamin C for various purposes.


With regards to COVID-19 pandemic, many people started wanting to boost their immune system thus making the demand for vitamin C supplementation and food products containing vitamin C is even higher. However, is it true that vitamin C can boost immune system and prevent or treat COVID19?

What is vitamin C and how does it improve immune system?(2)


Vitamin C or also known as ascorbic acid, is a water-soluble vitamin. It can also act as antioxidant, which helps in protecting cells against free radicals thus helps with various kind of diseases. Vitamin C improves our white blood cells  (WBC) which function in fighting the viruses, bacteria, and generally foreign materials in the body. There are various studies with regards to this, one of it is the study that compare the administration of vitamin C and vitamin E as antioxidant, finding of the study noted that vitamin C give greater effect on body immunity as compared to vitamin E.


Vitamin C supplementation (4,5,6,7)


Vitamin C is found abundantly in fruits and vegetables especially citrus food. Also, if you look closely on the food labelled, there are food that is fortified with vitamin C such as breakfast cereal, milk etc. Local fruit that is high with vitamin C is guava, the amount of vitamin C in guava is even higher than in the orange.


As for cold, vitamin C has been a long popular remedy for common cold, which is why many people started to consume it when the pandemic strikes. Research shows that vitamin C does not reduce risk of getting common cold. Well, being sick once in a while, or get common cold once in a while is a good thing actually, it helps  antibodies to fight against pathogen (bad bacteria and viruses) and improve the immune system naturally. However, the consumption of vitamin C can lead to  a shorter period of common cold with milder symptoms. But the consumption of vitamin C after the symptoms of common cold is showing does not appear to be helpful.


With the COVID-19 pandemic, it’s especially important to understand that no supplement, diet, or other lifestyle modification other than physical distancing, also known as social distancing, and proper hygiene practices can protect you from COVID-19. However, since the symptoms is the same as common cold thus it is thought that it can be used to alleviate the same symptoms present. Currently researchers and physicians are studying the effect of vitamin C via (high dose intravenous) (IV) and also on the effect of supplementation taking on the new COVID19.


In conclusion, 


It is safe to say that, there is no harm in consuming vitamin C with the purpose to boost immune system in this pandemic situation, but also it has to be hand in hand with the other safety precautions such as only go out when it is necessary, must always adhere to the one meter social distance measure, must always wear mask when you are outside, must wash hands frequently using soap or hand sanitizer.





  1. Oregon State University. Pauling Recommendation (2004). (Accessed on November, 16, 2020).
  2. Healthline. 7 Impressive ways Vitamin C benefits your body. ( Accessed on Nov 16, 2020)
  3. 8 Nutrients that will optimize your eye health. (Accessed on Aug 26, 2020)
  4. All About Vision. Lutein and Zeaxanthin. Eye and vision benefits. (Accessed on Aug, 26, 2020)
  5. Simonson W. (2020). Vitamin C and coronavirus. Geriatric nursing (New York, N.Y.)41(3), 331–332.
  6. Medical News Today (MNT). Can Vitamin C Prevent or Treat COVID19. (Accessed on November 16, 2020).
  7. Healthline. Can Vitamin C Protect you from Vitamin C. (Accessed on November 16, 2020).