Following a close second to Vitamin C is the under-appreciated Vitamin D. Vitamin D is actually a hormone which can be absorbed by about 2000 places in the body. This wide stretch of accessibility means it is involved in at least 2000 really necessary reactions in the body! We often run out of it in the winter when we’re not out in the sunshine or if we have major chronic disease which uses it up!
Vitamin D helps quell the fire of inflammation of chronic disease. It has been shown in some pig studies with coronavirus to protect the intestinal structure and improve the immune response to the virus and damage from stressors of confined pigs. These coronaviruses in pigs are very much like the ones in humans, dogs and cats.
I use Biotics Bio-D-Mulsion Forte® because it’s super concentrated (1 drop is 2000 iu). It’s easy to take and to put in your animals’ food!