Unlike humans they do not need an external source. In its purest form ascorbic acid it acts as an acidifier of pH in the body.
Their bodies can synthesize vitamin C all on their own.
Do cats make their own vitamin c?. So why do some think it could be bad for cats. You Wont Need More than a Fourth of a Cup. Some however argue that most cats livers arent functioning as they should and that vitamin C supplementation is necessary.
We can obtain vitamin A from our food sure but when needed we can make our own vitamin A from precursor nutrients like beta-carotene. Having said that allow me to share my own human vitamin c experience. A variety of single or multivitamin products are available for cats.
You dont see too many cats craving oranges for example. General vitamins and minerals. While cats can make vitamin C for example they cannot like humans make vitamin A.
Although they can produce some vitamin C domestic dogs and cats make much less than wild animals. Ad Nutra Thrive For Cats by Ultimate Pet Nutrition. Instead their livers create it on their own.
It interests me that cats do not require dietary vitamin C whilst we do. The only animals that cant make their own vitamin C are the haplorhine primates also called dry-nosed primates which includes us the cavy rodents eg. The answer is that nearly all animals the notable exceptions being human beings and other primates as well as guinea pigs can make their own supply of ascorbic acid.
Most cat foods contain all the necessary vitamins and minerals that a cat needs. Cats dont naturally require vitamin C in their diet. Interestingly this is one of the big differences between people and cats and dogs.
As an antioxidant it also helps support joints bones and the immune system. Guinea pigs capybaras the fruit bats and a number of bird species. While humans require vitamin C from the diet the bodies of cats and dogs can make their own vitamin C so you wont see deficiency in our cats and dogs so even more reason not to supplement.
The only ones known to be unable to produce Vitamin C within their bodies are primates including humans guinea pigs and fruit bats. In addition most mammals generate lots of vitamin C within their own bodies especially if they are stressed or ill. This may explain why pets eventually suffer from the same diseases as humans.
So it seems to me that there are so many unknowns about this type of supplementation for cats as so little research has been done. Because the source of vitamin C within a diet usually comes from the pelletsextruded kibble finding a heat-and-storage-stable vitamin C source was important to the animal. So it came as a bit of a surprise to learn that in certain specific organs and tissues vitamin C levels actually rose with advancing age increasing in the spleen lungs eyes and heart.
We make vitamin D in our skin so long as we get enough sunlight. For example Vitamin C is a requirement for life sustaining processes for us Mammalia and dogs and cats make plenty of their own within their bodys chemical factory — the liver. To see why lets examine the vitamin C biosynthetic pathway.
House cats synthesize their own vitamin C from glucose so they dont normally need supplementation of this vitamin. They must obtain vitamin A from their diet. In 1957 the famous biochemist Albert Lehninger studied vitamin C biosynthesis in animals and realized that unlike many species such as cats and dogs which can biosynthesize their own vitamin.