Micro-encapsulation is a state of the art technology that has the potential to revolutionize pet food industry, particularly when it comes to vitamins. It is basically protecting the vitamin from getting lost due to manufacturing (cooking, extrusion, etc.) and environmental factors (temperature, air, light, moisture, handling, etc.). In other words, it is preserving the efficacy of vitamins until reaching your pet's tummy, so he can get what he is supposed to and what you have paid for. Science4Pets (www.science4pets.com) is the only company with micro-encapsulated and non-China pet vitamin products in the market.