---
kind: "unit"
title: "21"
title_heading: "Food and Drugs"
key: "chI/subchD/part320"
level: "part"
label: "Part 320"
heading: "Bioavailability and Bioequivalence Requirements"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/21/chI-subchD-part320"
sections_count: 19
---

# Part 320 — Bioavailability and Bioequivalence Requirements

Title 21 C.F.R. — Food and Drugs › Chapter I — Food and Drug Administration, Department of Health and Human Services › Subchapter D — Drugs for Human Use

## Contents

- [Subpart A — General Provisions](/cfr/21/chI-subchD-part320-subpartA.md)
- [Subpart B — Procedures for Determining the Bioavailability or Bioequivalence of Drug Products](/cfr/21/chI-subchD-part320-subpartB.md)