Vitamin D and your Dogs Cancer

Over the years—caring for my own dogs and walking alongside clients whose dogs are facing cancer—I keep asking the same quiet question: is my dog truly getting what they need? I’ve also learned it’s okay to keep learning and to stay open to new information; a different perspective doesn’t mean the facts weren’t there—it just means we hadn’t seen them yet. For example, I only recently learned that many medicinal mushroom compounds have a half-life of about 10 to 12 hours, so giving them twice daily can help maintain their effects. We also know that medicinal mushrooms offer an abundance of Vitamin D.

It can be unsettling to learn that some commercial diets may miss essential vitamins while others oversupply them, risking toxicity—a confusing double-edged sword when you’re just trying to do right by your pet. What stands out most is how differently dogs can respond to the very same food: some thrive, while others quietly develop deficiencies. Did you know dogs don’t make meaningful vitamin D from sunlight the way we do?