---
kind: "unit"
title: "21"
title_heading: "Food and Drugs"
key: "chI"
level: "chapter"
label: "Chapter I"
heading: "Food and Drug Administration, Department of Health and Human Services"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/21/chI"
sections_count: 7906
---

# Chapter I — Food and Drug Administration, Department of Health and Human Services

Title 21 C.F.R. — Food and Drugs

## Contents

- [Subchapter A — General](/cfr/21/chI-subchA.md)
- [Subchapter B — Food for Human Consumption](/cfr/21/chI-subchB.md)
- [Subchapter C — Drugs: General](/cfr/21/chI-subchC.md)
- [Subchapter D — Drugs for Human Use](/cfr/21/chI-subchD.md)
- [Subchapter E — Animal Drugs, Feeds, and Related Products](/cfr/21/chI-subchE.md)
- [Subchapter F — Biologics](/cfr/21/chI-subchF.md)
- [Subchapter G — Cosmetics](/cfr/21/chI-subchG.md)
- [Subchapter H — Medical Devices](/cfr/21/chI-subchH.md)
- [Subchapter I — Mammography Quality Standards Act](/cfr/21/chI-subchI.md)
- [Subchapter J — Radiological Health](/cfr/21/chI-subchJ.md)
- [Subchapter K — Tobacco Products](/cfr/21/chI-subchK.md)
- [Subchapter L — Regulations under Certain Other Acts Administered by the Food and Drug Administration](/cfr/21/chI-subchL.md)