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Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Several cooked animal foods contain vitamin B12, but the available evidence does not establish any of them as “vet-approved” foods for cats or as a treatment for feline B12 deficiency. The figures below are for human servings—not cat portions. Keep your cat on a complete and balanced diet, and ask your veterinarian before offering human food or supplements.
Seven cooked foods that contain vitamin B12
The NIH Office of Dietary Supplements lists B12 amounts for human servings of these foods. They show that B12 occurs in animal foods; they do not establish a safe feline serving, a cat’s B12 requirement, or how much a cat would absorb from a treat. Do not use the figures to calculate a portion for your cat.
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| Food | B12 in the listed human serving | Preparation and serving |
|---|---|---|
| Beef liver | 70.7 micrograms | 3 ounces, cooked and pan-fried |
| Clams | 17 micrograms | 3 ounces, cooked |
| Oysters | 14.9 micrograms | 3 ounces, cooked eastern wild oysters |
| Salmon | 2.6 micrograms | 3 ounces, cooked Atlantic salmon |
| Tuna | 2.5 micrograms | 3 ounces, light tuna canned in water |
| Ground beef | 2.4 micrograms | 3 ounces, 85% lean and pan-browned |
| Egg | 0.5 micrograms | One large cooked egg |
All amounts and serving descriptions in this table come from the NIH Office of Dietary Supplements’ human-food data, which draws on USDA food-composition data. They are not feline feeding recommendations. See the NIH Vitamin B12 fact sheet.
Can these foods prevent or treat B12 deficiency in cats?
That has not been established by the human-serving figures. A cat’s B12 status depends on more than the amount present in a food; illness can interfere with digestion or absorption. Cornell’s Animal Health Diagnostic Center notes that cats with malabsorption or maldigestion often have low B12. Serum cobalamin and folate testing can help veterinarians assess certain small-intestinal disorders, and B12 reflects absorptive function in the ileum. Cornell explains these tests and their interpretation.
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If your cat has a low B12 result or signs of illness, contact your veterinarian rather than trying to correct the problem with treats. Cornell reports that B12’s half-life in cats is less than three weeks and recommends regular level assessment in cats receiving supplementation. The veterinary team can determine whether more investigation or monitored treatment is appropriate.
What should a cat eat day to day?
Cats are obligate carnivores, but that does not mean a menu of meat or B12-rich extras is nutritionally complete. Cornell describes complete and balanced commercial cat food as the practical dietary baseline. For a healthy cat eating such a diet, supplements are usually unnecessary; Cornell advises that supplements can be harmful and should not be given without veterinary approval. Read Cornell’s guidance on feeding cats.
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Ask your veterinarian whether a particular cooked food is suitable for your cat, considering the cat’s health and usual diet. Do not serve these foods raw. Cornell does not recommend raw diets, and the CDC warns that raw pet foods and treats can make cats sick. The CDC outlines pet-food safety risks.
When does a cat need B12 supplementation?
A veterinarian may recommend supplementation when assessment identifies a deficiency or a condition affecting B12. VCA describes cyanocobalamin as a B12 supplement used for systemic deficiency associated with metabolic or genetic disorders, including conditions such as exocrine pancreatic insufficiency and chronic enteropathies. It may be given orally as a tablet or by subcutaneous injection; a veterinary team can demonstrate injection technique. The form and monitoring plan should come from the treating veterinarian, because supplements can have side effects or interact with medications. VCA’s cyanocobalamin guidance explains these uses and precautions.
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