Ayurvedic Natural Immune Boosters having an important role to help the immune system achieve optimal function. Your immune system guards your body from germs, viruses, and other threats. Factors such as stress from weight loss and dieting, as well as excess weight, can take its toll on your immune system making you more vulnerable to colds and flu. Keep your immune system in shape with this combination of essential vitamins, minerals, and herbs which have been shown to directly boost immune system function and promote good health.