With just 1 ingredient, your dog gets a supercharged boost. Pure Krill contains astaxanthin, an antioxidant that is HUNDREDS of times more powerful than other antioxidants. Plus, it contains omega 3s with EPA and DHA fatty acids (exactly the kind your dog needs), phospholipids to efficiently deliver the omega 3s to where your dog's body needs them most, and a nutrient called choline, which supports the brain, heart, and liver. All that in 1 ingredient - and absolutely no artificial preservatives or additives.