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Effectiveness of garlic in fighting bacteriaFeatured science projectScience project video


The hypothesis that the presence of garlic will kill bacteria and prevent its growth is proven to be true.

The antimicrobial properties of herbs and spices are useful for medicinal purpose and also for the preservation of food. However it is also true that different spices are effective in providing resistance and protection against different types of microbes.

Also consider

Try repeating the experiment by boiling the garlic before extracting the garlic juice. Observe any differences in your results.

Try to repeat the experiment using onions or cloves instead of garlic.


  • Infection benefits from garlic -
  • Antimicrobial effects of spices and herbs -
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Complexity level:
Project cost ($):
Time required:
1 day to prepare, 5 days for experiment
Material availability:
Easily found
Safety concerns:

The bacteria should be destroyed before disposal. Pour some bleach into the petri dishes to kill all the bacteria before disposing them in the trash.