For more information about Renavast Visit this site www.entirelypets.com/renavast-kidney-support-cats-60-capsules.html as well as you can connect us on https://twitter.com/RenAvast. RenAvast is intended to support healthy Kidney function in your cat. RenAvast is a nutritional supplement composed of a combination of amino acids and peptides. Clinical studies have shown that a cat's health can be improved mere weeks after starting the supplement.