B:
Bibliographies & Research Guides Listed by Subject - Bibliographies, guides, finding aids, produced by the Science Reference Section of the Library of Congress, and arranged by subject. [Library of Congress]

C:
Clinical Trials.gov - Easy access to information on clinical trials for a wide range of diseases and conditions [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM); Department of Health and Human Services (HHS), Food and Drug Administration (FDA)]

D:
Dietary Supplements - Information from the FDA on deitary supplements and their regulation [Department of Health and Human Services (HHS), Food and Drug Administration (FDA), Center for Food Safety and Applied Nutrition (CFSAN)]

H:
Healthfinder - Your guide to reliable health information [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM)]

M:
MEDLINE/PubMed - Database with millions of references, primarily from MEDLINE, to journal articles in life sciences with a concentration on biomedicine [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM), National Center for Biotechnology Information (NCBI)]

MedlinePlus - Web site with authoritative consumer health information from NIH and others [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM)]

MedlinePlus Espanol - Spanish version of the Web site with authoritative consumer health information from NIH and others [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM)]

N:
National Center for Complementary and Alternative Medicine (NCCAM) - Explores complementary and alternative healing practices in the context of rigorous science [Department of Health and Human Services (HHS), National Inst. of Health (NIH)]

S:
Science Reference Service - Web site for Science Reference at the Library of Congress [Library of Congress]

Science Tracer Bullets - research guides that help you locate information on science and technology subjects. With brief introductions to the topics, lists of resources and strategies for finding more, they help you to stay on target. [Library of Congress]