Strawberry leaves contain trace minerals and vitamins, such as iron, calcium and vitamin C, that are important for the health and maintenance of many different body functions. The University of Maryland Medical Center, UMMC, says iron can improve red blood cell and hemoglobin production, helping treat anemia. UMMC also states that calcium helps support bone health and can prevent osteoporosis. Strawberry leaves also contain high amounts of vitamin C, or ascorbic acid, which acts as a powerful antioxidant in your body. Compounds found in strawberry leaves, such as the natural diuretic caffeic acid, may help pull water out of your joints, which can alleviate pain and swelling associated with conditions such as arthritis and rheumatism. Strawberry leaf tea is most commonly used to improve digestion and balance the acids and bases throughout your digestive tract to relieve symptoms of gastrointestinal distress. Strawberry leaves contain tannins, bio-molecules that bind to proteins, amino acids, alkaloids and other compounds with a low pH that may place excess stress on your digestive system. Strawberry leaves may help alleviate an upset stomach, and reduce symptoms of nausea, bloating, stomach cramps and diarrhea. Strawberry leaves are primarily used to relieve gastrointestinal distress and joint pain; they also contain essential minerals and vitamins that may offer a wide range of benefits.