Taking a cold shower is a great way to boost your immune system. As strange as it may sound, taking a cold shower will actually help your body to produce more white blood cells—the cells responsible for protecting your body from invading pathogens. The cold shower is believed to stimulate your metabolic rate, as your body is trying to warm it. This treatment helps promote weight loss, as they help the body to burn the brown fats. Brown fats are used by the body to produce internal heat.