From my friends at CBD Dog Health: https://bit.ly/46tjyDx
Vitamin D, whether taken orally or generated in the skin, generates a compound that binds to a protein receptor that regulates many cellular functions. This receptor slows the growth of cancer cells when activated. In fact, in laboratory research in cells and animals, a cancerous cell exposed to the active vitamin D compound will die (apoptosis). 
Knowing that cancer uses up a lot of Vitamin D, holistic veterinarians agree that pets with cancer should be supplementing with extra Vit D. 
But did you know, you can make your own supply of vitamin D-enriched mushrooms by simply exposing them to sunlight? 
It’s true! So would you rather have mushrooms, especially mushrooms like Turkey Tail, which are lauded for their anti-cancer properties, exposed to natural sunlight when grown outside on their native substrate or mushrooms grown under plastic canopies on non-native substrates, like bags of grain or corn? 
This is why you want to choose MycoDog’s VITALITY blend when you have a dog with cancer. MycoDog’s mushrooms are grown in the Pacific Northwest, in a non-polluted environment, outdoors, on their native substrates, synthezing Vit D with their exposure to natural sunlight. 
Plus, MycoDog blends are spagyrics and if you don’t know what a spagyric is, it’s a more potent version of a regular tincture, or powdered extract, for that matter. It’s truly a medicinal and