Is Garlic Good for Bad Breath?

No—when eaten to freshen bad breath, garlic is more likely to make it smell worse because its sulfur compounds contribute to breath odor.

Does garlic help bad breath?

Garlic is not a reliable remedy for bad breath. Its distinctive smell can remain noticeable after a meal, even if you normally have a clean mouth. For alternatives, see the best foods for bad breath.

A temporary garlic smell is different from bad breath that keeps returning. Persistent odor can have several causes, including food debris, a dry mouth or dental problems. Adding garlic is unlikely to address those causes and may add another odor.

If you enjoy garlic in food, there is no need to avoid it solely because of its smell. But if freshening your breath is the goal, oral care and attention to the underlying cause are more useful than eating extra garlic.

How does garlic affect breath?

When garlic is cut or chewed, sulfur-containing compounds form and contribute to its strong smell. Some odor remains in the mouth, while some compounds are absorbed into the bloodstream and carried to the lungs, where they can be breathed out.

That helps explain why brushing can remove food particles without immediately eliminating all garlic odor. The smell may persist even after the mouth feels clean because some of it comes from compounds being exhaled.

Other types of bad breath can also involve sulfur compounds. Bacteria in the mouth can produce odors as they break down material left on the tongue or around the teeth and gums. Dry mouth can make the problem more noticeable because saliva normally helps clear the mouth.

What does the evidence say about garlic and bad breath?

We found no studies showing that eating garlic or using a garlic preparation improves bad breath. There is no established garlic dose, rinse or preparation that can be recommended for freshening breath.

Even if an ingredient affects bacteria in a laboratory, that alone would not show that eating it improves breath in people. A useful study would also need to consider garlic’s own smell and whether any improvement lasts.

We found no evidence that garlic water freshens breath. Diluting garlic does not make it a proven treatment for the cause of persistent odor.

How should you use garlic if you have bad breath?

Use garlic as a food if you like it, rather than as a breath remedy. If you have an occasion when you want to minimize noticeable odor, avoiding garlic beforehand is more predictable than trying to cover its smell afterward.

Do not hold a raw garlic clove against your teeth or gums. Direct contact can irritate or burn the tissues in your mouth. Garlic supplements and concentrated preparations are not established breath-freshening treatments either.

Instead, focus on habits that address common sources of odor:

1. Brush your teeth twice a day with fluoride toothpaste, paying attention to the gumline.
2. Clean between your teeth daily to remove material a toothbrush may miss.
3. Clean your tongue gently, including toward the back as far as is comfortable, without scraping hard enough to cause irritation.
4. Clean dentures or removable dental appliances as directed by your dentist or their manufacturer.
5. Drink water regularly if your mouth feels dry, and ask a dentist or clinician for advice if dryness persists.

Sugar-free gum after a meal can stimulate saliva, but it will not immediately remove garlic compounds being exhaled from the lungs. For more options, see the best drinks for bad breath.

Who should be careful, and when should you see a doctor?

Garlic can cause mouth irritation or digestive upset, and it may aggravate reflux for some people. Stop using it if it causes symptoms and ask a dentist or clinician for advice. During pregnancy or for children, stick to ordinary food amounts unless a clinician recommends otherwise.

If you take a blood thinner or an antiplatelet medicine, or have a procedure planned, speak with your clinician before using garlic supplements because they can increase bleeding risk. Do not stop prescribed medication on your own.

See a dentist if bad breath persists despite regular oral care, or if you also have bleeding gums, tooth pain or a persistently dry mouth. A dentist can check for dental causes and suggest whether a medical evaluation is needed.

Seek prompt dental or medical care for worsening mouth pain, swelling or fever. Get emergency care for difficulty breathing or swallowing, or rapidly spreading swelling of the face or neck.