Deficiencies of vitamin K can cause prolonged. Fresh foods high in vitamin C include citrus fruits notably oranges and lemons bell peppers broccoli strawberries cantaloupe kale tomatoes and organ meats. Vitamin C for Dogs Vitamin C is an important antioxidant.
There is no AAFCO dietary requirement for vitamin C for dogs and cats because they are able to synthesize it in the liver. Without enough vitamin C in their diets guinea pigs can become very ill with scurvy. Vitamin C is critical to the health of both humans and dogs.
Since vitamin C is water soluble you cannot actually overdose a dog with vitamin C because excessive amount is excreted through the kidney. Under normal conditions they synthesize vitamin C in their liver which produces the active enzyme L-gluconolactone oxidase the last of the chain of four enzymes which synthesize ascorbic acid. Even more importantly if it is supplemented above and beyond what their own bodies are making we may be providing an excess of vitamin C.
Thats because it acts as an antioxidant helping protect the body against the damaging effects of oxidation. This means that species requiring vitamin C must consume it regularly to maintain circulating levels. For example the daily vitamin C recommended supplemental level for a 136 kg 30 lb dog is 60 mg and for a 27 kg 6 lb cat is 12 mg.
While ascorbic acid is essential in the diet of humans other primates and guinea pigs dogs have no dietary requirement for this vitamin since they make their own.