U,S. Department of Health & Human Services
Seaicn NIH
NIH
National Institutes of Health
Turning Discovery Into Health
NIH Employee [ntraret
Szaf: Directo y
En Espaiol
Health Information
Grants &
Funding
News & Events
Research &
Training
Institutes at NIH
About NIH
COVID- 19
Publlc health Informatlon from CDC
Research Informatlon from NIH
Espanol
NIH
staff guldance on coronavirus (NIH Only)
NMEtltrs
BNHI d Xitns
Aoogzz
Edo
NATioNAL
998882639 usbarethesdury
Ile
Eolity,
drugealitoholaind ia developingtteen
druG
Lear aiore
ALCOHOL
SHATTER THE MYThS 
Learn more
EAcTSWeER
In the News
Melatonin
COVID-19
Drug Overdoses
Caloric Restriction
Use of the supplementis rising among
Immune response Improves for months
surge in mixing opioids and stimulants
Study examines effects on immune
adults_
after vaccination;
function_
NIH at a Glance