Hair Growth Vitamins That Are Actually Worth It  The National Council on Aging (NCOA)









Protective vitamin shots for newborns on decline  National Institutes of Health (NIH) | (.gov)









Vitamin D and Breastfeeding  Centers for Disease Control and Prevention | CDC (.gov)




Vitamin D Certified Assays and Participants  Centers for Disease Control and Prevention | CDC (.gov)








Can Taking Vitamins Combat Infection?  American Society for Microbiology



The 7 Best Vitamins & Minerals for Your Immune System  Cleveland Clinic Health Essentials



Micronutrient deficiency linked to chronic pain in new study  The University of Arizona Health Sciences














12 Foods That Help Boost Your Immune System  Cleveland Clinic Health Essentials





The Best Time to Take Vitamin D for Maximum Absorption  Health: Trusted and Empathetic Health and Wellness Information












What Happens to Your Body When You Take Vitamin D Supplements Every Day Long Term?  Health: Trusted and Empathetic Health and Wellness Information