The 15 Best Supplements to Boost Your Immune System Right Now
15. Vitamin D
Vitamin D is the most important compound when it comes to building up white blood cells. As you may know already, white blood cells are responsible for decreasing inflammation, which helps to promote an immune response. Without a sufficient level of vitamin D, you are at high risk of asthma, influenza, and at high risk of upper respiratory tract infections.
Some studies even note that vitamin can improve response to antiviral treatments in people with HIV and hepatitis C. How much vitamin D do you need? This will depend on your blood levels, but anywhere between 1,000 and 4,000 IU per day is enough for most people.