The calcium in kale will help your body relax after a stressful day. We don’t typically think of green vegetables as containing calcium, since dairy gets bought up the most in a discussion on calcium, but kale has plenty. The interesting thing is that it will give you energy to get you through your day, and then help you relax when the day is finished and it’s time for rest. It really is a wonderful food, and one that provides plenty of benefits, including essential minerals, protein, and fiber.