I would kill to get bison adrenals. No way I can get that here. I don't believe they are supposed for longevity. Okinawans, Sardinians or Puerto Rico's natives didn't seem to eat bison. The key for longevity is lifestyle, environment and well-raised animal foods. In order of priority, it seems that environment is first, lifestyle second and lastly diet. In Los Andes from Peru, there are native people who live on legumes, grains, and tubers and there are a lot of centenarians. But, look at their environment, they are in one of the least polluted areas of the world.