Krill oil is a dietary supplement derived from tiny crustaceans called krill, which are found in the ocean. It is rich in omega-3 fatty acids, particularly EPA and DHA, which are known for their potential health benefits, including supporting heart health and reducing inflammation. Krill oil also contains antioxidants, such as astaxanthin, which may help protect cells from damage. Many people take krill oil as an alternative to fish oil supplements. It is often considered more sustainable because krill are abundant and harvested in a way that minimizes environmental impact. Additionally, some studies suggest that krill oil may be more easily absorbed by the body compared to fish oil.