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Measuring Volatile and Non-volatile Antifungal Activity of Biocontrol Products
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Garlic for the common cold.

Elizabeth Lissiman1, Alice L Bhasale, Marc Cohen

  • 1Faculty of Medicine, Dentistry & Health Sciences, The University ofWestern Australia, Crawley, WA, 6009, Australia. libby.lissiman@gmail.com.

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This summary is machine-generated.

Garlic supplements may reduce the frequency of common cold episodes, but more research is needed. One study showed fewer colds in the garlic group compared to placebo.

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Area of Science:

  • Evidence-based complementary medicine
  • Herbal medicine research
  • Clinical trial analysis

Background:

  • Garlic (Allium sativum) is widely used for its purported antimicrobial and antiviral properties.
  • The common cold causes significant morbidity and economic impact globally.
  • Garlic supplements are frequently consumed for health benefits.

Purpose of the Study:

  • To evaluate the efficacy of garlic for preventing or treating the common cold.
  • Comparison against placebo, no treatment, or standard medical interventions.
  • Assessment of garlic's role in cold symptom management.

Main Methods:

  • Systematic review of randomized controlled trials (RCTs).
  • Searches conducted across multiple databases: CENTRAL, MEDLINE, EMBASE, AMED, and OLDMEDLINE.
  • Data extraction and quality assessment by independent reviewers.

Main Results:

  • Only one RCT met inclusion criteria, involving 146 participants over 12 weeks.
  • The garlic group (180 mg allicin daily) reported significantly fewer common cold occurrences (24 vs. 65) and fewer illness days (111 vs. 366) compared to placebo (P < 0.001).
  • Recovery time was similar between groups; adverse effects included rash and odor.

Conclusions:

  • Insufficient clinical trial evidence currently supports garlic for common cold prevention or treatment.
  • A single trial suggests potential preventive benefits, but requires validation through further studies.
  • Current claims of garlic's effectiveness for colds are largely based on limited, lower-quality evidence.