Guava has a high source of Vitamin C and Fiber that acts as an antioxidant. These Antioxidants have the tendency to reduce the effect of oxidation. Common Facts About Guava Guava is a Fruit With Medicinal Properties And Helps In Many Health Problems Such As Diarrhea, Blood Pressure And So On. Here Are Some Facts About Guava That You Need To Know. Guava Usually Grows To About 20 Feet In Height. Guava Produces White Flowers.