In blood work for either a cat, dog or human the ALT levels stand for the liver, If this is elevated you need to get a handle on it right away or your pet will be in liver failure before you know it and by that time the liver will be so far gone you won’t get it back without a great deal of work on your part.
I have used this http://www.petwellbeing.com/products/cat-liver-disease but. I put the dose in a blank capsule, coated it with olive oil followed by a syringe of water and gave it that way because the taste was too bitter for King Ramses. This brought his levels back to normal. If you get blood work yearly you can keep a look out for slightly elevated ALT levels…If you don’t I would do a liver detox once a year for about two months.
Better if not in their food so it works just on the liver.