* Selenium, manganese, phosphorus, magnesium are some of the nutrients found in oats and [[barley]]. While they are popular for lowering the risk of developing cardiovascular disease, they are also becoming popular in strengthening the immune system.
* [[Astragalus]] root is known for its powerful immune system boosting capabilities.
* [[Echinacea]] is a popular herb that has been identified to boost immunity. Combined with goldenseal, another herb, or enjoyed alone as tea, this member of the daisy family has been found to prevent and treat upper respiratory tract infections as well as the common cold.
*[[Ginseng]] : This herb has many varieties. The most commonly studied variety is Panax ginseng, also known as Korean ginseng. Its main active component, ginsenosides, has been proven to have anti-inflammatory and anti-cancer properties. Clinical research studies have demonstrated that it may improve immune and psychological functions as well as conditions related to diabetes.
== Warnings ==