Key takeaways
- A Waltham study found cats need at least 39 mg of taurine per kg of body weight each day on canned food, and 19 mg/kg on dry food.
- That works out to roughly 160 mg a day for a 4 kg cat on canned food, and about 80 mg on dry food.
- Canned food needs more, because cats keep less taurine from heat-processed food.
- A healthy cat on a complete commercial food usually needs no extra taurine, per VCA.
- Homemade, raw and mixed diets, and any heart or eye problem, are the times to ask your vet about taurine.
Taurine dosage for cats depends on the diet. A Waltham study found that cats need at least 39 mg of taurine per kg of body weight each day on canned food. On dry food, the figure was 19 mg per kg. So a 4 kg cat needs roughly 80 to 160 mg a day, which a complete commercial food usually supplies.
This guide turns those numbers into simple steps. It also explains AAFCO label minimums and when a supplement makes sense.
For the basics first, read our complete guide to taurine for cats.
Table of contents
How Much Taurine Does a Cat Need? Taurine Dosage for Cats
First, cats must get taurine from food, because they make very little themselves. VCA explains that taurine is found only in animal-based protein. In addition, it notes that cats do not store much, so they need it regularly.
The clearest daily figures come from a 1991 Waltham study by Earle and Smith. The researchers fed cats different diets for six weeks and tracked blood taurine. Here is what it took to keep levels in the normal range for taurine dosage for cats.
| Diet type | Taurine dosage for cats per day | Source |
|---|---|---|
| Canned food | At least 39 mg per kg body weight | Earle and Smith, 1991 |
| Dry food | At least 19 mg per kg body weight | Earle and Smith, 1991 |
| Purified lab diet | At least 10 mg per kg body weight | Earle and Smith, 1991 |
In other words, taurine dosage for cats is not one number. The same cat needs about twice as much taurine from canned food as from dry food.
Taurine Dosage for Cats by Body Weight
To find a rough daily need, multiply your cat's weight in kg by the figure for its diet. For example, a 4 kg cat on canned food needs at least 4 × 39, or about 156 mg a day.
| Cat weight | Canned food (39 mg/kg) | Dry food (19 mg/kg) |
|---|---|---|
| 3 kg (6.6 lb) | About 117 mg | About 57 mg |
| 4 kg (8.8 lb) | About 156 mg | About 76 mg |
| 5 kg (11 lb) | About 195 mg | About 95 mg |
| 6 kg (13.2 lb) | About 234 mg | About 114 mg |
These are our own estimates from the study's minimums. However, they describe what the whole diet should supply, not what a supplement must add. In most cases, a complete food is already built to provide it.
Pounds to kilograms
If you know your cat's weight in pounds, divide by 2.2. So a 10 lb cat weighs about 4.5 kg. Then use the table above as a guide.
Example: a 4 kg indoor cat
Say your cat weighs 4 kg and eats only canned food. In that case, the Waltham minimum works out to about 156 mg of taurine a day.
Now say the same cat eats half canned and half dry food. Then the need falls somewhere between about 76 and 156 mg. Either way, a complete and balanced food is designed to cover it. So for this cat, the taurine dosage for cats question is mostly about choosing the right food, not adding a scoop.
Why Canned Food Raises the Taurine Dosage for Cats
At first, it seems odd that wet food needs more taurine. However, the reason lies in how food is made and digested.
Research points to gut bacteria. In a 1996 study in the Journal of Nutrition, cats fed a canned heat-processed diet lost blood taurine more slowly when they also got antibiotics. That suggests gut bacteria help break down taurine that would otherwise be reused.
Besides that, VCA adds two more points. Food processing can affect taurine levels, and more dietary fiber can lower absorption. As a result, makers add extra taurine to canned foods.
Similarly, cooking at home matters too. A UC Davis study of feed ingredients found that cooking, especially boiling, can reduce taurine. Our guide to taurine foods for cats compares natural sources.
AAFCO Minimums and Taurine Dosage for Cats on the Label
Pet food labels, however, use a different unit: percent of dry matter. The AAFCO cat food nutrient profiles require at least 0.10% taurine in dry food and 0.20% in canned food, on a dry matter basis.
| Food type | AAFCO minimum (dry matter) | Same in mg per kg |
|---|---|---|
| Dry (extruded) food | 0.10% | 1,000 mg per kg |
| Canned food | 0.20% | 2,000 mg per kg |
So, the canned minimum is double the dry one, which matches the Waltham data on taurine dosage for cats. In general, a food labeled complete and balanced for your cat's life stage should meet these levels. AAFCO explains how to find that statement in its guide to reading labels.
Still, labels are not a guarantee. In a 2015 UC Davis study of vegetarian diets, three canned foods tested below the AAFCO taurine minimum.
Taurine Dosage for Cats: Myths vs Facts
| Myth | Fact |
|---|---|
| Every cat needs a taurine supplement | No. VCA says healthy cats on a complete food do not need one. |
| Wet food always has more taurine | Not in practice. Cats keep less from canned food, so labels must contain more. |
| Tuna is a top taurine source | Not really. UC Davis data found canned tuna held far less than organ meats. |
| Cooking does not matter | It does. Boiling can wash taurine out of meat. |
| One dose fits every cat | No. Taurine dosage for cats depends on weight and diet type. |
In short, the right taurine dosage for cats starts with the food bowl, not the supplement shelf. For more on fish, see can cats eat tuna.
Which Cats Need Extra Taurine?
Most cats do not. In fact, VCA states that a healthy cat eating a high-quality cat food for its life stage does not need supplements. Taurine dosage for cats becomes a real question in a few cases.
- Homemade or raw diets. For example, recipes can fall short, and cooking can lower taurine.
- Vegetarian or vegan diets. Merck notes that plant protein contains no taurine.
- Cats fed dog food. VCA says dog food does not contain enough taurine for cats.
- Cats with heart or eye disease. In this case, your vet sets the amount as part of treatment.
- Mixed diets with many treats. WSAVA suggests foods not labeled complete make up 10% or less of the diet.
Also, see our taurine FAQ for quick answers on diets and labels.
Taurine Dosage for Cats on Raw and Homemade Diets
Homemade and raw diets are where taurine gaps happen most. For example, a recipe heavy in muscle meat, or meat that is boiled, may supply less than you expect.
Also, Merck notes that taurine-related heart disease still occurs in cats fed vegetarian food, baby food or home-cooked food. So it is wise to have any recipe checked.
- Use a tested recipe. Ideally, ask a board-certified veterinary nutritionist to design or review it.
- Cook gently. Instead of boiling, keep any cooking juices in the meal.
- Add taurine as directed. Then measure the amount the recipe calls for, every time.
- Recheck over time. Finally, ask your vet whether a blood test makes sense.
Kittens, pregnant and nursing cats
Growing kittens and mother cats need steady taurine. For instance, the Earle and Smith paper cites older NRC minimums of 400 mg per kg of dry matter for kittens and 500 mg per kg for pregnant cats. However, the authors noted those figures came from purified diets, so they may not fit real foods.
That is why a vet should set any taurine dosage for cats in these life stages. Meanwhile, a complete food labeled for growth or all life stages is the safest base.
How to Give a Taurine Dosage for Cats Step by Step
If your vet suggests a supplement, then the routine is easy. Also, most taurine powders are mild and mix well into wet food.
- Review the diet first. Bring the food labels or recipe to your vet.
- Read the label. Then find the milligrams of taurine per scoop or gram.
- Measure a level scoop. Use the serving your vet or label gives.
- Mix into a small portion. Next, serve the rest of the meal once your cat eats it.
- Keep it daily. In addition, ask when to recheck, especially for a homemade diet.
Can a Cat Get Too Much Taurine?
Overall, taurine has a good safety record at a normal taurine dosage for cats. VCA says supplementation is relatively safe, with no reports of problems from excessive dietary taurine in cats.
That said, AAFCO sets no maximum, and a missing limit is not proof that any amount is safe. So stick to the label or your vet's taurine dosage for cats. More is not better for a healthy cat on a complete diet.
Signs a Cat Is Not Getting Enough Taurine
VCA warns that signs of deficiency develop slowly and can take months to appear. As a result, some damage may be done by the time you notice.
- Vision loss. First, low taurine damages the retina, called feline central retinal degeneration.
- Heart disease. In addition, it can weaken the heart muscle, causing dilated cardiomyopathy (DCM).
- Digestive upset. This is because taurine is part of bile salts.
- Breeding and growth problems. Finally, VCA lists small litters and delayed growth in kittens.
The landmark 1987 Pion study in Science found heart failure linked to low blood taurine in 21 cats on commercial foods. Taurine supplements were linked to normal heart function returning. Since then, VCA notes, all diets formulated for cats add enough taurine for a normal cat. Today, Merck notes that this form of DCM is much less common.
Fortunately, blood taurine can recover quickly. The Waltham study found that levels returned to normal within two weeks of feeding an adequate diet.
Common taurine mistakes to avoid
- Switching to a homemade diet without adding taurine
- Feeding a cat dog food for weeks, since VCA says it lacks enough taurine
- Guessing a taurine dosage for cats from a human product
- Stopping a vet-prescribed amount without asking first
Above all, any change in eyes, energy or breathing deserves a vet visit, not a bigger scoop.
When a Vet Should Set the Taurine Dosage for Cats
Ask your vet to set the amount in these cases, rather than following a general table.
- A heart murmur, heart disease or vision changes
- A homemade, raw or vegetarian diet
- Pregnancy, nursing or a growing kitten
- Kidney, liver or gut disease, or a prescription diet
Meanwhile, your vet may also run a blood taurine test. In the end, that test, not a chart, shows whether the current taurine dosage for cats in your home is enough.
Also, a 1994 Waltham paper studied the taurine requirement of kittens fed canned food. Clearly, growing kittens and mother cats are exactly where your vet's guidance matters most.
Feeding a homemade or mixed diet?
Kittysum Taurine is a daily taurine powder with a measuring scoop, made to add taurine to daily meals. Ask your vet to confirm the amount. See the label and serving directions →
Key Terms Explained
- Taurine: an amino acid-like nutrient that cats must get from animal-based food.
- mg/kg body weight: milligrams of a nutrient for each kilogram the cat weighs.
- Dry matter basis: a nutrient amount measured after all water is removed from a food.
- Plasma taurine: the taurine level in the liquid part of the blood, used to check status.
- DCM (dilated cardiomyopathy): a weak, enlarged heart muscle that low taurine can cause in cats.
Frequently Asked Questions
How much taurine does a cat need per day?
A Waltham study found at least 39 mg per kg of body weight a day on canned food and 19 mg per kg on dry food. That is roughly 80 to 160 mg a day for a 4 kg cat.
What is the taurine dosage for cats on a homemade diet?
It depends on the recipe and cooking method. Ask your vet or a board-certified veterinary nutritionist to set the amount.
Can I give my cat too much taurine?
VCA reports no problems from excessive dietary taurine in cats. Still, follow the label or your vet's amount.
Does my cat need a taurine supplement?
Usually not. VCA says a healthy cat on a complete commercial food for its life stage does not need one.
Why does wet food need more taurine?
Cats keep less taurine from heat-processed canned food. Research suggests gut bacteria play a role in breaking it down.
References
- Earle KE, Smith PM. Dietary taurine content and plasma taurine in the cat. Br J Nutr. 1991.
- Earle KE, Smith PM. Taurine requirement of the kitten fed canned foods. J Nutr. 1994.
- Pion PD, et al. Myocardial failure in cats with low plasma taurine. Science. 1987.
- Dietary antibiotics decrease taurine loss in cats fed a canned diet. J Nutr. 1996.
- Spitze AR, et al. Taurine in animal feed ingredients. 2003.
- Kanakubo K, et al. Protein and amino acids in vegetarian pet diets. 2015.
- VCA Animal Hospitals. Taurine in Cats.
- AAFCO. Cat Food Nutrient Profiles.
- AAFCO. Reading Labels.
- Merck Veterinary Manual. Nutritional Requirements of Small Animals.
- Merck Veterinary Manual. Dilated Cardiomyopathy.
- WSAVA. Selecting a pet food for your pet.
This article is for general education and is not veterinary advice. These statements have not been evaluated by the Food and Drug Administration. Kittysum products are not intended to diagnose, treat, cure or prevent any disease.
