The chemicals in neem leaves also have properties that work against diseases like malaria, rheumatism, anorexia, epistaxis, biliousness and arthritis. The leaves also possess anti-pyretic properties, that is they can take the body temperature down from a high raised level. Degenerating lifestyle has left many people susceptible to heart disorders. Extracts of neem will make your heart strong, and keep it protected from blood pressure fluctuations, bad cholesterol and changes in the heartbeat.