There is an interesting link listed to a nutritionist's webpage you may want to review. Bullion cubes are nothing more than flavored salt. While salt is an essential part of diet, all these candies, gums etc. are more for moral than anything else. They might help the flavor or palatablity of wild foods, especially for the culturally unfamiliar. Once you've toured a meat plant though, insects and snakes are not so bad. I haven't found any rule stating one kit is obligatry. Get a second and see how exponentially you first aid or food options increase. In my 3rd and 4th kit ( A. is gear B. first aid ) I have a tea block, salt, pemmican, fruit leather and mulivitamins, additional matches.