Well, these capsules worked for their intended purpose, so I'm giving them a 5-star rating. Some rotten excuse for a human being dropped off a cat on our property. We already are at our limit for indoor house cats, so after the necessary trip to the vet, the new guy got to live in our breezeway at night to keep him from getting beat up by all the local barn cats from the neighboring farms. We'd let him outside during when the weather was nice. But, this cat - one of his ears is white. It turns out that white ears get sunburn . . . and then the cat gets Skin cancer and the ear has to be lopped off. Fortunately, he was scheduled for another vet visit for updated shots and the vet caught the sun damage to the ear before it became a serious problem. The recommendation was to either give the cat a specified dose of beta-carotene or vitamin A each day. If you went with the vitamin A, you had to keep taking the cat back to the vet for bloodwork to prevent toxicity. Since we're an hour away from the vet, I opted for the beta-carotene. I squirted the contents of two of these capsules on the cat's food each morning and each evening. The cat was no longer allowed outside between the hours of 9 AM to 3 PM (no sunbathing allowed during those hours, the vet said . . . yes, really, that's what she said). The cat's ear healed up in a matter of two months and he no longer needs the beta carotene . . . and he's only allowed out now for an hour or so in the morning and an hour or so again in the evening. And nooooo sunbathing allowed. Beta carotene squirted on top of the cat food results in an orange mug on the cat, btw. (No, it's not lily pollen on his face. He's just fine.