The immune system is a complex collection of defense mechanisms responsible for warding off infectious microbes and other pathogens. Your immune system may become compromised due to disease, poor nutrition, stress or environmental toxins. Botanical medicines have been used for centuries to increase the body's vitality and strengthen the body's defenses. Herbs and teas most commonly recommended to boost the immune system include Asian ginseng, astragalus, ashwagandha and shatavari. Before using medicinal herbs, talk with a qualified medical professional about any health concerns you may have.
Ashwagandha
Ashwagandha is a plant often used in India to restore immune system function and support vibrant health. Also known as Indian ginseng or wild cherry, ashwagandha shows promise as an anti-inflammatory and antitumor agent, according to the Memorial Sloan-Kettering Cancer Center. Scientists do not yet understand how ashwagandha works on a physiological level, although it is thought that the bioactive constituents of the herb may include saponins, withanolides and steroidal lactones. The plant is also high in iron and is prescribed by traditional practitioners for anemia. Speak with a physician before using ashwagandha, as it may interact with prescription or over-the-counter medicines.
Shatavari
Shatavari, a woody, climbing vine native to India, is used in the centuries old Ayurvedic medicine system as a rejuvenating tonic. The Chopra Center notes that shatavari has anti-inflammatory properties and helps the body recover from depletion. Research also indicates that shatavari increases the functioning of macrophages, which are cells that protect the body from pathogens, according to a 2003 review in "Indian Journal of Medical Sciences." Despite its possible benefits, shatavari is not a replacement for treatment from a qualified healthcare professional.
Asian Ginseng
Asian ginseng, also known as Chinese ginseng, is native to Russia and Asia and has been used medicinally since antiquity. The Memorial Sloan-Kettering Cancer Center reports that studies of Asian ginseng indicate its potential value as an immunostimulant and anti-cancer supplement. Its active therapeutic constituent is thought to be ginsenosides, which stimulate the central nervous system and increase cellular-dependent resistance. Do not confuse this herb with American ginseng or Siberian ginseng, as they have different therapeutic properties.
Precautions
While these herbs are generally safe, they may interact with prescribed drugs or be contraindicated if you have certain medical conditions. For example, Asian ginseng may be estrogenic and should not be used by women who are on hormone replacement therapy, according the Memorial Sloan-Kettering Cancer Center. In addition, the book "Complete Guide to Safe Herbs" says it is beneficial when taking this herb to eat potassium-rich foods to compensate for possible potassium depletion it may cause. Ashwagandha should not be used in pregnancy, as it may cause miscarriage.
References
- Memorial Sloan-Kettering Cancer Center: Ashwagandha
- "Indian Journal of Medical Sciences"; Asparagus Racemosus--An Update; R.K. Goyal et al.; September 2003
- The Chopra Center: Shatavari
- Memorial Sloan-Kettering Cancer Center: Asian Ginseng
- "Complete Guide to Safe Herbs"; Chris Meletis, N.D.; 2002
