There is no scientific evidence to suggest that applying garlic juice to your face can grow a beard or mustache. While garlic has some health benefits, including antimicrobial and anti-inflammatory properties, there is no evidence to suggest that it has any effect on hair growth.
Moreover, applying garlic juice to your face can be harmful to your skin. Garlic is a strong irritant and can cause skin damage, including redness, itching, and chemical burns. It is important to be cautious when applying any natural ingredient to your skin, as they can cause reactions in some people.
If you are looking to grow a beard or mustache, there are several other things you can try. These include maintaining a healthy diet and lifestyle, getting enough sleep, and taking care of your skin and hair.
Additionally, there are several beard growth products on the market, such as beard oils and balms, that can help to nourish and promote healthy beard growth. It's always a good idea to consult with a healthcare professional or a dermatologist if you have concerns about your beard growth or the health of your skin.