Guava fruits are amazingly rich in antioxidants, vitamin C, potassium, and fiber. This remarkable nutrient content gives them many health benefits. Here are 8 evidence-based health benefits of guava fruits and leaves. It has antioxidant, anti-inflammatory and anti-microbial properties which help to maintain a healthy scalp. The vitamin C content improves collagen activity aiding in hair growth and the lycopene content gives protection from sun's UV rays. Guava is loaded with nutrients. Not only does it have more Vitamin C than oranges, guava is also rich in other antioxidants, and has been shown to have a number of great health benefits. Here are just a few of the benefits of eating this tropical fruit. One of the key nutrients found in guava is fiber.