Being extremely rich in vitamin C, guava is one of those fruits that promote healthy hair growth. It also helps in combating hair loss problems. Guavas can be blended and used as a facial scrub or face wash to help improve skin condition. Some people say that guava works better than most beauty creams and other skin products in the market. Eating guavas can help tighten skin and eliminate visible signs of aging like wrinkles and age spots.