Chris Masterjohn database resources at chrismasterjohnphd.com.
Supplement quality testing organizations:
Continuous glucose monitoring services for non-diabetics:
These services have democratized access to CGM data for personalized nutrition; useful for individual glucose response patterns, but with attention to the orthosomnia-equivalent anxiety that can develop from constant monitoring.
Personalized nutrition projects:
The external research links from the Nutrition Rabbit Hole page, preserved here as a reference for further reading: