Its leaves do not fall. Dates are rich in several vitamins and minerals. When the level of trace elements falls in the body, the health of the blood vessels is affected leading to an increased heart-rate and a consequent inability to perform its function with normal efficiency. As dates are also rich in calcium, they help, to strengthen the bones. When the calcium content in the body decreases, children are affected with rickets and the bones of adults become brittle and weak.
Dates are also important in keeping up the health of eyes.
It is quite effective in guarding against night-blindness. In the early years of Islam, dates served as food for Muslim warriors. They used to carry them in special bags hung at their sides. They are the best stimulant for muscles and so the best food for a warrior about to engage in battle. At other times he mixed ripe dates with cucumber, or dates combined with ghee.