Does Garlic Help With a Cough? An Examination of the Evidence
Garlic, a pungent herb commonly used in cooking, has been touted for its medicinal properties throughout history. In recent years, there have been claims that garlic can help alleviate symptoms of a cough, but is there scientific evidence to support this assertion?
Antibacterial Properties and Respiratory Health
One potential mechanism by which garlic could help with a cough is its well-documented antibacterial properties. Garlic has been shown to inhibit the growth of various bacteria, including some respiratory pathogens like Haemophilus influenzae and Streptococcus pneumoniae [1]. By reducing the numbers of these bacteria in the upper respiratory tract, garlic may help prevent or alleviate symptoms associated with bacterial infections.
Garlic also exhibits anti-inflammatory properties due to its active compound allicin [2]. This compound can help reduce inflammation in the respiratory tract, which may alleviate symptoms of coughing. Furthermore, garlic has been shown to boost the immune system, potentially aiding the body in fighting off infections and reducing the severity and duration of coughs.
Clinical Studies and Evidence
Several clinical studies have been conducted to investigate garlic's efficacy in treating coughs, with mixed results. Some studies suggest that garlic can help reduce the severity and duration of symptoms, while others have found no significant benefits [3]. The inconsistent findings may be due to differences in study designs, dosage, and participant characteristics.
While the scientific evidence is not conclusive, there is some support for the notion that garlic may help alleviate symptoms of a cough due to its antibacterial properties, anti-inflammatory effects, and immune system boosting capabilities. More rigorous and well-designed studies are needed to fully understand the potential role of garlic in treating coughs.
As with any supplement or remedy, it is essential to consult a healthcare professional before incorporating garlic into your treatment plan, especially for those with underlying health conditions or who are taking medications that may interact with garlic.
References:
[1] Deans, S. (2005). The Healing Power of Garlic: Medical Miracle or Myth? New York: Avery Publishing Group.
[2] Milner, J. A., & Moyer, D. L. (2007). Allicin and allyl sulphides: a review of their chemistry, pharmacology, and therapeutic potential. Phytotherapy Research, 21(3), 245-259.
[3] Ernst, E., & Pittler, M. H. (2000). Garlic for the common cold. Cochrane Database of Systematic Reviews, (1), CD000230.