Introducing Longevity15 Health Supplement for X-Small Dogs. This supplement is powered by fatty15, a C15:0 essential fatty acid, to support your pet’s overall health and longevity. With its unique formula, Longevity15 helps promote cellular health, supports glucose metabolism, and aids in the proper functioning of the liver and heart. It also helps protect your pet’s body cells and tissues, promoting a healthier, longer life for your furry companion.