Health Topics Find information on health, wellness, disorders and conditions
Drugs & Supplements Learn about prescription drugs, over-the-counter medicines, herbs, and supplements
Genetics From Genetics Home Reference Explore genetic conditions, genes, and more
Medical Tests Learn why your doctor orders medical tests and what the results may mean
Medical Encyclopedia Articles and images for diseases, symptoms, tests, treatments
Healthy Recipes Try these recipes as part of a healthy lifestyle
null null null null
  • You can get vitamin D in three ways: through your skin, from your diet, and from supplements.
  • Find out how much you need to avoid a deficiency.
Tweets ‎@MedlinePlus Skip Twitter Feed
NIH MedlinePlus Magazine Read the latest issue
All of Us Health Information for All of Us Research Program Participants
Clinical Trials Search ClinicalTrials.gov for drug and treatment studies.