Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Allium species, particularly garlic (Allium sativum), have a longstanding history of use in traditional medicine systems worldwide for the prevention and treatment of colds and related respiratory illnesses. Historical texts from Ancient Egypt, Greece, China, and India document the use of garlic and other Allium plants as remedies for infections, including symptoms associated with colds. The traditional justification is largely based on the antibacterial and purported antiviral properties attributed to sulfur-containing compounds such as allicin, which is released when garlic is crushed or chopped.

While there are modern scientific studies investigating the potential of Allium extracts for immune support and mild cold prevention, results remain inconclusive and sometimes methodologically weak. A few small randomized controlled trials suggest a possible reduction in the incidence of colds or the duration of symptoms when garlic supplements are used regularly, but these studies often lack replication, have small sample sizes, or are limited by participant bias. Systematic reviews (e.g., Cochrane 2014) conclude that the available evidence is insufficient to firmly recommend Allium for cold prevention, though its traditional use persists. Overall, the use of Allium for preventing colds is justified primarily by tradition, with some suggestive but not definitive scientific support.

More about Allium (unspecified)
More about Colds (prevention)

Other ingredients used for Colds (prevention)

Other health conditions supported by Allium (unspecified)

Products containing Allium (unspecified)