PLEASE NOTE: I have discontinued keeping Dietary Supplement Warning Letter charts up-to-date now that I publish the 483 Observations charts, as those are more accurate.
The following links are to older, archived charts and presentations.
- FDA Warning Letter Charts Sep 26, 2012 – An Analysis of Warning Letter Data Issued by FDA to Dietary Supplement firms. This report contains data from Warning Letters up until 2012 only [pdf].
- Inspection Observation Data Issued by FDA to Dietary Supplement Firms for Violations of cGMP’s (21 CFR 111) Data Analysis By: Marian Boardley, Marian Boardley Consulting LLC Last Updated: 12/3/2012 [large pdf file]
- More 2012 data on Warning Letters for 21 CFR 111 / Dietary Supplements: 21 CFR 111 – Warning Letter by Subpart (Archive .pdf)