#1. Garlic’s Antimicrobial Abilities
While it’s known for its strong smell and flavor, garlic (Allium sativum) can help counteract a number of harmful microorganisms and promote immune function.
Civilizations around the globe have used garlic as food and medicine for thousands of years. In 18th-century France, a group of thieves was accused of robbing victims of the bubonic plague without contracting the illness. Their alleged secret? Consumption and external use of vinegar made with garlic and other antimicrobial herbs. Their legendary heist was so influential that 'vinaigre des quatre voleurs' (Four Thieves Tonic Vinegar) is still sold in France today.
What makes garlic so powerful as an antimicrobial agent? According to the American Society for Microbiology, it is a chemical compound called allicin that naturally occurs when garlic is crushed. This nifty component of fresh garlic clove can help disrupt the formation of a variety of pathogens. Garlic can help tackle three types of infections: bacterial, viral and fungal.
The best part of garlic’s antibacterial activity is that the allicin tends to only interfere with disease-causing bacteria rather than the “friendly” bacteria, such as Lactobacillus, that colonize and benefit the intestines.
One study found that people who took a garlic supplement for 12 weeks from November through February had fewer colds than those who took a placebo. Other Allium species (chives, onions, leeks) have shown antimicrobial activity too.
Garlic Preparation and Usage for Infections:
Much of the information about garlic’s antimicrobial power comes from lab studies. Less is known about how well garlic preparations work in humans with these infections. The same can be said about most of the other herbs listed below. Heat deactivates garlic’s antimicrobial ingredients.
For that reason, it’s best to consume it raw or as a tablet that promises a certain amount of allicin, the key active chemical. If you apply garlic topically as a paste, protect the skin with olive oil or another type of oil, cover it with gauze or a clean cloth and remove after an hour.