Vitamin A important for cow herds  High Plains Journal















Can Taking Vitamins Combat Infection?  American Society for Microbiology



Vitamin D supplements may slow cellular aging  National Institutes of Health (NIH) | (.gov)











































Vitamin A won’t prevent measles—vaccination will, says expert  Harvard T.H. Chan School of Public Health


























Scientists finally confirm vitamin B1 hypothesis from 1958  University of California, Riverside