Guava leaves have been used as a medicinal herb for hundreds of years and there are many health benefits of guava leaves, The guava is a perennial plant (shrubs and small trees) .There are about 100 species belonging in the myrtle family. Guava have green foliage, white flowers, and fruits that are produced at the start of summer. At maturity, the guava tree can reach up to 25 feet high. Health Benefits of Guava Leaves Aging and Age-Related Diseases Guava leaves have a high content of antioxidants. Antioxidants can help prevent and repair cell damage from free radicals (oxidants), thus slowing the aging process and reducing ones risk of diseases linked to aging (such as heart disease, cancer, Alzheimer's disease, macular degeneration, cataracts, and osteoarthritis). Gastrointestinal Problems Guava leaf extracts can inhibit diarrhea caused by bacteria, including Salmonella spp., Staphylococcus aureus, and Escherichia coli. Guava leaves has been effective in stopping diarrhea in individuals with cholera. A decoction of guava leaves can increase the secretion of digestive enzymes and also help halt vomiting. Weight Loss It is believed guava leaves can prevent starch from converting into sugar by inactivating the enzyme amylase. Diabetes Guava leaves have been used as a folk remedy to treat diabetes for many years. Guava leaves reduces glucose levels in the blood without effecting levels of insulin. Allergies Guava leaves have an anti-allergic effect and can inhibit the release of histamine. Other Health Benefits Guava leaves relieving arthritis pain when made into a paste and applied over the affected area. Guava leaves Speeding up the healing process and relieving pain in wounds and sores when the leaves are crushed and applied over the affected area.