Last updated: October 2026. General background reading related to the topics covered on this site. We are not affiliated with or endorsed by any institution below.
Dietary Supplements
NIH Office of Dietary Supplements — what you need to know about supplements.
Herbal Supplements
NCCIH: Herbal Supplements — What You Need To Know — general background and safety information.
Lung Health
NHLBI: Your lungs — general information on how the lungs work and how to protect them.
Quitting Smoking
CDC: Tobacco and Smoking — general information and support for quitting.
A Note on These References
These are general background reading only. They are not endorsements of any product and are not claims about the featured supplement. See our disclaimer.