Why Vitamin D?
Most pet owners are diligent about vaccines, flea prevention, and annual checkups—but there's one critical health marker that often flies under the radar: Vitamin D levels.
This essential nutrient plays a foundational role in immune function, skeletal health, cardiovascular wellness, and more. Yet unlike humans, dogs and cats cannot synthesize enough Vitamin D from sunlight alone—they depend on their diet and, in some cases, supplementation.
Why Vitamin D Matters for Pets
Vitamin D (specifically, 25-hydroxyvitamin D) supports a wide range of critical biological processes:
Immune Response
Vitamin D helps your pet fight infection and control inflammation. Studies show that low Vitamin D levels are linked to increased inflammation and decreased survival in critically ill dogs.
Vitamin D acts as an immunomodulator, preventing the immune system from overreacting—a key factor in conditions like:
- •Allergies
- •Chronic dermatitis
- •Inflammatory bowel disease (IBD)
- •Autoimmune conditions
Heart Health
Vitamin D deficiencies have been linked to cardiomyopathy and kidney disease. Lower levels are associated with a higher risk of adverse cardiac events in dogs.
Kidney Health
Low Vitamin D levels are common in pets with chronic kidney disease, often contributing to secondary hyperparathyroidism.
Additional Critical Functions
Silent Consequences of Low Vitamin D
- →Chronic inflammation
- →Weak bones or dental issues
- →Increased risk of infection
- →Poor healing and post-surgical recovery
Are Some Pets at Greater Risk?
Certain pets are more likely to have suboptimal Vitamin D levels:
Dietary Factors
Pets eating homemade, raw, or limited-ingredient diets may not get adequate Vitamin D. But even commercial pet foods can fall short—while they meet AAFCO minimum requirements, these may not reach optimal targets for all pets.
Important: Vitamin D levels in food do not always correlate with blood levels—testing is the only way to know for sure.
Chronic Conditions
Pets with kidney disease, liver disease, or cancer
Aging Pets
Senior or immunocompromised animals
Clinical Signs
Those with frequent infections, joint issues, or low energy levels
How is Vitamin D Tested in Pets?
Testing is simple: a blood test measures serum 25-hydroxyvitamin D levels, the most accurate marker of Vitamin D status in the body.
We Recommend Testing For:
Pets with unexplained fatigue, inflammation, or mobility issues
ALL CANCER PATIENTS
Dogs with lymphoma and other cancers have been shown to have lower Vitamin D levels. Higher levels at diagnosis are linked to longer survival times.
Pets on non-standard diets (homemade, raw, or exotic proteins)
Senior pets during routine wellness checkups
Pets recovering from injury, illness, or surgery—low levels in hospitalized dogs are linked to higher risk of death
Test results will indicate whether your pet is deficient, insufficient, or at optimal levels, allowing for a tailored treatment plan.
What If My Pet Is Deficient?
If testing reveals low Vitamin D, we can help restore healthy levels through:
Vet-Guided Supplementation
Safe, measured dosing tailored to your pet's needs
Diet Adjustments
Especially important for homemade or exotic protein diets
Re-Testing
Monitor progress to ensure safe, effective correction
Supportive Therapies
Target inflammation, muscle strength, and immune function
Important Warning
Do NOT give your pet human Vitamin D supplements or over-the-counter products without veterinary guidance. Overdosing can be toxic and cause serious health complications.
The Bottom Line
Vitamin D is a vital building block for your pet's long-term health. Testing can uncover hidden imbalances before they turn into bigger problems—helping your dog or cat live a longer, stronger, healthier life.
Ready to take this proactive step?
Schedule Your Pet's Vitamin D Screening Today
Contact Healing Paws Center to schedule a wellness screening and discover if your pet's Vitamin D levels are optimal.