With the cold and wet weather, we spend more time indoors and in close quarters with those around us. Now is the time when our immune system could use a boost. Our immune system protects us from bacteria and viruses and harmful substances in our environment. To help your immune system, take advantage of any sunny day to catch some rays, avoid smoky areas, limit alcohol consumption and consider adding some supplements. Immune system boosting supplements available at your health food store include, probiotics as well as supplements made with plants, herbs and minerals used to prevent and fight infections