Four ways to stop colds and flu Some tips to reduce the duration of colds and flu, which may alleviate the symptoms associated with cold and flu: 1. Double vitamin D for three days: Vitamin D deficiency is widespread among people who live in cold regions, when the temperature drops decreases vitamin D in the body - and because the body produces after soaking up the sun - and that makes people vulnerable to viruses. Where have shown that a previous study that the reactivation of T cells - responsible for the defense of the body - Includes vitamin d. When the flu, researchers are advised to eat 25,000 to 30,000 units during the 3 days. And then reduce the dose to 4000 units a day for a period of time. 2. Increase the level of vitamin C: more than vitamin C from the body's immunity, it increases the ability to attack the infection by stimulating white blood cells and increase the rate of arrival to the place of injury, a study showed that taking vitamin C increases the effectiveness of white blood cells in the elimination of pathogens. 3. Stimulate blood circulation: in order to stimulate the immune system, can be made as follows: wear socks wet with cold water and then wear the other dry above and then go to sleep, which leads to activating blood circulation and can be done for three nights in a row. 4.Increase the level of probiotics: All people benefit from probiotics found in milk in facilitating the process of digestion and increased immunity, where previous studies have shown that probiotics reduce the incidence of respiratory infections, antibiotics may cause the immune system is put out while working on probiotics activated again.