Why is a Healthy Immune System Important? Best Vitamins for Immune System Health

Why is a Healthy Immune System Important? Best Vitamins for Immune System Health

The immune system is a complex collection of organs, cells, antibodies, and other chemicals that work together to protect and defend you from foreign invaders such as bacteria, viruses, parasites, and fungi. To handle the important task of being your defender, a lot of activity takes place, especially during certain times of the year. 

Every single day the immune system produces 10 billion new white blood cells, which are very important to immune function.1 And that’s just one aspect of immune activity. How does such a complex, active, and vast system function properly? With nutrition.*

Best Foods for Immune Health*

Foods contain nutrients such as vitamins A, E, D, and C, which are known to help support immune health on a cellular level which includes neutrophils, T-cells, natural killer cells, and those important white blood cells.2 Foods high in vitamin C and other immune-supporting nutrients that have been shown to support immune health include fruits, berries, vegetables, nuts, seeds, and whole grains.3 

Edible mushrooms such as reishi and shiitake have also been shown to support immune health.4 Whole garlic contains a compound known as allicin which has also been shown to be a powerful way to support immune health.5

Best Vitamins for Immune System Health*

Sometimes it can be difficult to get all the immune-supporting vitamins and nutrients needed from diet alone to defend yourself. That’s where dietary supplements can help, beginning with vitamin C. Vitamin C has a long history of playing a key role in supporting immunity because it is an important antioxidant that can help support B and T cell production, as well as other immune system functions.6*

Vitamin C and More!*

A healthy immune system is key to seasonal wellness. To support your immune system, especially during seasonal times, eat a diet that contains lots of fresh whole foods such as colorful fruits and vegetables. KAL Defender C™ tablets feature all these together for a well-rounded immune support formula to help support your immune system.

For more tips on nutrition, mind & body health, and taking care of your family follow us on Facebook @kalvits and Instagram at @kalvitamins!


*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.



  1.  Lytal C. How the body balances its immune system. USC News. 2018;May 30. https://news.usc.edu/143798/how-the-body-balances-its-immune-system/
  2.  Vishwakarma S, Panigrahi C, Barua S, Sahoo M, Mandliya S. Food nutrients as inherent sources of immunomodulation during COVID-19 pandemic. Lebensm Wiss Technol. 2022;158. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8801482/?report=reader
  3.  Calder PC. Foods to deliver immune-supporting nutrients. Curr Opin Food Sci. 2022;43:136-145. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8702655/?report=reader
  4.  Valverde ME, Hernández-Pérez T, Paredes-López O. Edible mushrooms: improving human health and promoting quality life. Int J Microbiol. 2015;2015. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4320875/?report=reader
  5.  Arreola R, Quintero-Fabián S, López-Roa RI, et al. Immunomodulation and anti-inflammatory effects of garlic compounds. J Immunol Res. 2015;2015. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4417560/?report=reader
  6.  Carr AC, Maggini S. Vitamin C and Immune Function. Nutrients. 2017;9(11):1211. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5707683/?report=reader
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