You can find more scientific research on B12's role from sources like the National Institutes of Health
You dont have to be wealthy, but you have to be above a certain threshold in terms of disposable time and income to spend on good food, gym memberships or exercise equipment at home and those things
Delaunay, D., Kawaguchi, A., Dehay, C
Scurvy, the hallmark disease of severe vitamin C deficiency, displays symptoms resulting from loss of collagen that weakens connective tissues: Skin spots caused by bleeding and bruising from broken blood vessels Swelling or bleeding of gums, and eventual loss of teeth Hair loss Delayed healing of skin wounds Fatigue, malaise Iron-deficiency anemia due to decreased absorption of non-heme iron BENEFITS OF VITAMIN D INJECTION: Vitamin D has vital role in the growth and strength of bone and skin
Once your cat becomes anemic, his ability to fight the virus (or anything else) decreases considerably