# FDA Warning Letter: Kaleido Biosciences, Inc.
> 2021-09-07 · Center for Drug Evaluation and Research | CDER · `a712734583d7e761`
## Letter
- **Company:** Kaleido Biosciences, Inc.
- **Posted Date:** 2021-09-07
- **Letter Issue Date:** 2021-08-26
- **Issuing Office:** Center for Drug Evaluation and Research | CDER
## Subject
Bioresearch Monitoring Program
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*Source: [FDA Warning Letters](https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/compliance-actions-and-activities/warning-letters) · AI Analytics · CC0 1.0*