First of all, there needs to be more information on Amazon as to what is in this product. As one reviewer pointed out, this supplement contains fructose. I'm not sure why a cat would need fructose or even if they can metabolize it but this ingredient was a point against using it in my book. With more information, I probably would not have purchased this item. Second of all, this product contains iron. I don't know about other cats, but mine is fed raw red meat. I cannot get him to eat poultry most of the time so he eats mostly beef, venison, lamb and occasionally rabbit. Eating these raw meats, I find it hard to believe that he needs iron. What I do know is that too much iron can be detrimental and I fear that more than a lack of iron. Now that's what I did not like about this product. Here's the good. I purchased this for my cat who has heart disease and is taking Lasix to help prevent fluid build-up around the heart and lungs. Lasix robs the body of potassium and his recent blood work indicated that his potassium levels are now clinically low. Our cat has been struggling with poor appetite for some time and I'm confident that it is due to his heart medication side effects. I was hoping that the B1 in this product would help with the appetite issues. When I received this supplement, my vet was on vacation for a week. Rather than wait to administer it for a whole week, I gave my cat a small amount. I offered him a few drops in a dish and he turned his nose up at it. So the product looses points for palatability. Not to be deterred, I put 8 drops in a #3 capsule and pilled him. Eight drops is what a #3 capsule will hold. This worked out much better and since I wasn't trying to give a full dose, I wasn't as concerned about how I was going to get 2ml down him. He took this product with a dose of 8 drops once a day for 8 days. It did seem to help with his appetite a little. I'm not sure what would have happened if we were able to give him the full dose. Also on the bottle it states this supplement is to be given with caution in cats with heart disease which would have been helpful to know ahead of time. This was another reason for starting out with a very low dose. In the end, I have decided to go with my vet's recommendation for supplementing with plain potassium. Sometimes, less is best. The main reasons are because this product contains iron and fructose and because my cat does not like the taste. In fact, I have never had a cat who was interested in anything bacon flavored so if your cat likes the taste of this supplement consider yourself lucky. As a side note, I did find something that is helping his appetite even more than the few drops of this supplement that I gave him. It is homeopathic alfalfa 6c. I put one pellet into his water bowl and he's eating pretty good again.