The immune system is a collection of cells, glands, chemicals and tissues that help fight infection and prevent illness. The main agents responsible for ridding the body of bacteria, viruses and other foreign bodies are special cells called lymphocytes, also known as killer cells, T cells and B cells. The immune system works to protect the body against harmful antigens. Certain herbs and supplements may help strengthen the immune system. Check with your doctor before trying herbs or other natural therapies.
Astragalus
Astragalus is an Eastern herb used in Traditional Chinese Medicine to treat infectious diseases. Herbalists use it as a treatment mainly for cancer, heart disease, diabetes and weakened immune function. It is naturally anti-inflammatory, antibacterial and antiviral. It also contains antioxidants, which help protect the body against free-radical damage. The University of Maryland Medical Center describes it as an adaptogen as it helps protect the body from the effects of stress. It is specifically indicated for those who have undergone chemotherapy or other treatments that weaken the immune system. The standard dose is 250 to 500mg, three to four times per day.
Echinacea
Echinacea, also known as purple coneflower, is a popular herbal remedy used to treat the common cold, influenza, cancer and other infectious conditions. It is a tall flowering herb that was traditionally used in native American medicine, though its popularity has spread throughout Europe and other countries around the world. According to the Clayton College of Natural Health herb reference guide, it is an immunostimulant and natural antibiotic. It helps activate T cells and moves white blood cells to areas of infection. Do not use echinacea for more than two consecutive weeks as the body may become resistant to its effects.
Garlic
Garlic is a versatile herb valued by chefs and herbalists alike. It is rich in antioxidants and is naturally antibiotic, antibacterial, antifungal and antiparasitic. Herbalists use garlic to lower cholesterol and blood pressure, treat the common cold and flu, and protect against heart disease and cancer. The University of Maryland cites several studies that show that garlic has anti-cancer properties, helps strengthen the immune system in cancer patients, slows the progression of cardiovascular disease, and prevents and treats the common cold. The therapeutic dose is 600 to 1,200mg of aged garlic extract daily.
Licorice
Licorice is an ancient herb that was traditionally used to treat respiratory infections, colds, viral infections and ulcers. It is also used topically to treat psoriasis, eczema and herpes. It is naturally antiviral and anti-inflammatory. The Clayton College of Natural Health herb guide explains that it helps strengthen the immune system by increasing T cell counts. It is a gentle laxative and helps cleanse the digestive tract. Herbalists also use licorice to help those recovering from an illness. Though it increases energy levels, it may also elevate blood pressure. Consult a health care professional before using licorice for medicinal purposes.
Turmeric
Turmeric is a spice that gives curry its golden color. It has been used in Eastern and Ayurvedic medicine for centuries. Herbalists use turmeric to treat digestive disorders, kidney stones, and arthritis and to detoxify the liver. It is naturally anti-inflammatory, antibacterial, antiviral and antiparasitic. It has been studied extensively as an alternative cancer treatment. In 2007 researchers from Cytokine Research Laboratory at the University of Texas M. D. Anderson Cancer Center found that curcumin, the active ingredient in turmeric, also supports the immune system by activating T cells, B cells and natural killer cells. Check with your health care provider for proper use of turmeric.
