Taurine for Dogs - Why It Matters for Heart, Eyes, and Energy
Last reviewed: October 2026
Short answer: Taurine is an amino acid that supports normal heart muscle function, healthy vision, and cellular energy in dogs. Most dogs make enough from the protein in their food, but breed, diet type, and age can affect taurine levels. If you have concerns, your veterinarian can test your dog's taurine level with a simple blood test.
What is taurine?
Taurine is an amino acid found in high concentrations in the heart, eyes, brain, and muscles. Unlike cats, dogs can usually make taurine from other amino acids in their diet, which is why it is not considered essential for dogs in the same way. Some dogs, however, may not make or absorb as much as they need.
What does taurine do for dogs?
Supports normal heart function
Taurine helps regulate calcium in heart muscle cells, which supports normal, steady contractions.
Supports healthy vision
Taurine is concentrated in the retina, where it plays a role in normal eye health.
Supports energy and vitality
Taurine supports mitochondria, the parts of cells that produce energy, which helps active dogs stay active.
Which dogs may need more taurine?
- Some larger breeds, such as Newfoundlands, Golden Retrievers, and Cocker Spaniels, have been studied for differences in taurine levels.
- Dogs on certain diets, especially some grain-free or homemade diets, may be worth discussing with your vet.
- Older dogs, whose diet and absorption may change with age.
If your dog falls into one of these groups, ask your veterinarian whether testing makes sense. A blood test is the only way to know your dog's level.
Food sources of taurine
Taurine is found in animal proteins such as meat, poultry, fish, and especially organ meats like heart. A complete and balanced dog food typically covers your dog's basic needs.
Should you supplement taurine?
Many owners choose a daily wellness supplement for extra support as dogs age. Talk to your vet if your dog has a known heart or eye condition, because supplements are not a substitute for veterinary care.
For broad daily wellness support as dogs age, see our Longevity Daily Multivitamin, and check the product page for the current ingredient list.
Related reading: Do dog multivitamins really work?
Frequently asked questions
Do dogs need taurine?
Dogs need taurine, but most make enough from the protein in a complete and balanced diet. Some breeds and diets may affect levels.
How do I know if my dog is low in taurine?
Only a blood test from your veterinarian can tell you.
Is taurine safe for dogs?
Taurine is generally well tolerated. Follow label directions and talk to your vet if your dog has a health condition.
This article is general information, not veterinary advice. Talk with your veterinarian about your dog's specific needs. Furevery supplements are not intended to diagnose, treat, cure, or prevent any disease.
