Vitamin C for Dogs: Benefits, Dosage, and How to Add It to Your Dog’s Diet
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When it comes to our dogs’ well-being, pet parents tend to focus on things like exercise, training, and belly rubs.
But nutrition plays just as big a role—and one nutrient that sometimes sparks questions is vitamin C. So can dogs have vitamin C? The short answer is yes—but it’s not always necessary.
Key Takeaways
- Dogs make their own vitamin C, so supplements aren’t usually needed unless they have an underlying reason.
- Sometimes extra vitamin C may help with illness recovery, aging, stress, or inflammation.
- Veterinarian-approved supplements are the safest way to add vitamin C.
- Too much vitamin C can cause stomach upset or bladder stones, so always follow your vet’s advice.
What Is Vitamin C?
Vitamin C—also known as ascorbic acid—is a nutrient and an antioxidant found naturally in many fruits and vegetables. It supports a healthy immune system and protects the body from disease. It’s needed to make collagen, which boosts joint health and mobility.
Unlike humans, dogs synthesize their own vitamin C in the liver, says Dr. Kristi Crow, a veterinarian in Indianapolis, so you often don’t need to boost your dog’s intake with supplements or a vitamin-C-rich diet.
However, there are some circumstances when a dog’s vitamin C levels might need to be replenished.
5 Benefits of Vitamin C for Dogs
Certain situations can cause an influx of free radicals, the damaging, unstable molecules that vitamin C protects against. So while not every dog needs extra vitamin C, some conditions can call for the extra boost.
“Exposure to stressors such as toxins, poor diets, or aging may reduce their ability to produce enough vitamin C, leading to situations where supplementation could be beneficial,” says Dr. Rebeca Moreno, DVM, a veterinary nutrition consultant and owner of Best by Vets.
Here’s how vitamin C can support dogs who need it most.
It Supports the Immune System
Vitamin C helps stimulate the production and function of white blood cells, which are the body’s front-line defense against infections. Pups who are recovering from an illness could benefit from a little extra vitamin C.
It Aids in Joint Health and Mobility
Vitamin C plays an important role in collagen production, the protein that makes up cartilage, tendons, and ligaments. In some cases, vitamin C can be a part of a joint-support plan, especially for senior dogs or those prone to hip or elbow issues.
It Adds Antioxidant Protection
Like humans, dogs are exposed to environmental stressors such as pollutants, pesticides, and toxins, all of which can cause oxidative stress. Vitamin C’s antioxidant power helps neutralize the free radicals produced by these environmental stressors, potentially lowering the risk of chronic disease.
It Helps Manage Stress
Periods of stress—whether from travel, moving homes, or even loud noises like fireworks—can deplete vitamin C levels in a dog’s body. Pet parents may want to give extra vitamin C to dogs dealing with chronic stress, but they should only do so under the guidance of a vet.
It Reduces Inflammation
Vitamin C can be a helpful supplement for dogs with chronic inflammation. If your pup is living with inflammation triggered by allergies, infection, or stress, consider talking to your vet about starting them on vitamin C.
Best Ways to Give a Dog Vitamin C
Always consult your veterinarian before changing or adding a supplement to your dog’s diet. Then if you and your vet decide your dog could benefit from extra vitamin C, there are several ways to add it to their routine.
Vet-Approved Supplements
Experts agree that veterinarian-approved supplements are the most accurate and effective way to add therapeutic quantities of vitamin C to your dog’s diet.
Products with calcium ascorbate or sodium ascorbate are usually preferred, Dr. Moreno says, because they are well absorbed. Consider the following options and be sure to get vet approval before adding any of these to your pup’s diet.
Recommended Products
Fruits
Fresh dog-safe fruits can be a tasty way to boost vitamin C—but only in moderation. “Too much may cause digestive upset,” says Dr. Crow.
Fruits are also considered treats, which should never make up more than 10% of your dog’s diet.
Stick with the following fruits to give your pup a safe, vitamin C-rich snack.
Vegetables
Some veggies are both rich in vitamin C and safe for dogs. But, like fruit, these should be given in moderation.
How Much Vitamin C To Give Your Dog
When it comes to determining how much vitamin C to give your dog, factors like size and overall health will play a part.
“There is no official requirement, since dogs produce their own,” Dr. Crow says.
Generally, dogs who need an extra wellness boost will require less extra vitamin C than older dogs or dogs who are recovering from stress or illness. Dr. Moreno recommends splitting the daily amount between two doses a day to avoid an upset stomach.
Always consult your veterinarian before adding vitamin C to your dog’s diet, whether in supplements or another form, and follow their specific dosing instructions.
Can Vitamin C Be Bad for Dogs?
Too much vitamin C in dogs can lead to vomiting and diarrhea, Dr. Crow says, and it may also cause calcium oxalate bladder stones, which can lead to pain and difficulty urinating.
That’s why it’s essential to follow your vet’s advice when giving your dog vitamin C.
FAQs About Dogs and Vitamin C
Is vitamin C good for dogs?
Yes, vitamin C can be good for dogs. But unlike humans, dogs naturally produce vitamin C on their own, so it’s not always necessary to supplement it.
Can I give human vitamin C to my dog?
No. Never give your dog a human supplement unless your veterinarian tells you to do so.
Is vitamin C good for sick dogs?
Yes, vitamin C can be a helpful supplement for dogs recovering from illness, thanks to its antioxidant properties and ability to support the immune system. However, offer vitamin C only if your vet recommends it.
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