Preventing a cold is something that needs to be taken into action instantly when you feel the first sign of sickness. By the time you get around to finding the time to run to the local pharmacy, your cold has now turned into a full blown infection that will most likely need a prescription. That can all be avoided if you purchase an Echinacea supplement and keep it in your kitchen pantry. Echinacea is an herbal supplement that keeps your immune system stong and wards off colds and flus. Supplement Central carries Nature’s Herbs Echinacea-Golden Seal for a reasonable price and I believe its something worth looking into if you have a weak immune system.