Garlic has long been thought to have antimicrobial properties. A 2011 study found that garlic concentrate is effective against bacteria. You can purchase garlic concentrate or extract at your local health food store. You may also be able to make your own by soaking a few garlic cloves in olive oil.
Garlic is generally safe to ingest, but large doses might cause internal bleeding. Up to two cloves per day is considered an acceptable dosage. If you’re taking a garlic supplement, be sure to follow the dosage directions as provided.
If you’re taking blood-thinning medication, consult your healthcare provider before using garlic as an antibiotic. Large doses of garlic can amplify the effects of this medication.
You can also apply garlic concentrate directly to a wound or blemish.