The National Institute on Aging (NIA) -- a division of the National Institutes of Health, US Department of Health and Human Services -- offers free posters, fact sheets, pamphlets, etc. on various topics targeting health of older individuals including

Alzheimer's
exercise
grief
shingles
nutrition

and much more...

Some publications are available in Spanish.

See the complete list of available publications here:

https://order.nia.nih.gov/view-all-publications