When formulating our NutriSource Pet Foods we carefully consider every ingredient. Good 4 Life supplements work to support your pets’ health and longevity. Good 4 Life supports proper absorption of the nutrients that matter while helping to assure the pets’ body is adequately prepared to defend itself against infection and disease. Gut health and proper immune function are inextricably linked. Disease begins in the gut. Conversely, so does good health. Good 4 Life works from the inside out to provide perfect results.