Drinking milk while eating meals that include garlic can reduce the breath odor associated with it.
Whole milk and fat-free milk both lower the concentration of odor-emitting compounds in the nose and mouth, but whole milk was found to be more effective. Drinking milk after a meal can help, but drinking it during the meal produces better results.
Garlic is a rich source of magnesium, selenium, and vitamins B6 and C and is reported to have many health benefits. Its characteristic odor and flavor is derived from its high levels of sulfur compounds.
“Drinking Milk Can Prevent Garlic Breath,” Institute of Food Technologists, 2/4/13