Survival Tabs have a long history. Back in the 1960's the Federal Government was searching for a food source that could be used in specialty situations. The objective was to find a product that would provide the best possible nutrition in the smallest possible volume. The resulting research was extremely involved and intense, and the product that evolved was used in the early space program. Eventually, a tablet was perfected and used widely as a emergency food. It came to be known as The Survival Tabs. 12 Tabs Per Day Is All You'll Need The Survival Tabs will keep you alive and moving for months at a time, on the amount you can carry in your backpack. Our recommended consumption of 12 tabs per day may be decreased when other foods are available in adequate amounts and quality. Or it may be increased in times of complete starvation or extreme physical exertion. 12 Tabs provide 100% of the U.S. RDA of 15 Essential Vitamins & Minerals