Vitamin C

• Vitamin C is one of best known immune system boosters. Because of it's high antioxidant value, it is an excellent adjunct to a healthy diet.
  
  

Echinacea

• Echinacea is a commonly used herb to normalize an immune system. It works by increasing the cells that help destroy viruses and bacteria.
  
  

Zinc

• The mineral zinc helps in the production of white blood cells that fight infections. Supplemental products are often in the form of lozenges, gels and sprays.
  
  

Probiotics

• Probiotics are the good bacteria commonly referred to as acidophillus, bifidobacteria and lactobacillus. Probiotics work by repopulating the healthy bacteria essential to immune health.
  
  

Fruit and Vegetables

• Because many people do not get adequate nutritional value by eating enough fresh produce, freeze dried supplements may be an easy alternative to replace nutrition that is lacking. Products claim to provide nutritional profiles in supplement form comparable to that of fresh produce.