The NaturVet Tear Stain Plus Lutein is a veterinary-formulated, tear stain-free formula that contains Eyebright and natural, active ingredients to help eliminate unsightly tear stains from the inside out. This formula is easy to administer and is powder-safe for use in all dogs and cats over the age of 12 weeks. The NaturVet Tear Stain Plus Lutein comes with a 100% satisfaction guarantee so if you aren’t satisfied for any reason you can get a full refund.