H.R. 4434 — Cosmetic Supply Chain Transparency Act of 2025

This section amends Chapter VI of the Federal Food, Drug, and Cosmetic Act by (1) inserting a heading for subchapter A, “Adulterated and Misbranded Cosmetics,” before section 601; (2) revising section 614(b) to limit federal preemption by preserving state and local authority to prohibit or limit cosmetic ingredients, continue pre-existing ingredient reporting requirements, and enforce transparency or protective measures exceeding those in the Modernization of Cosmetics Regulation Act of 2022 or Cosmetic Supply Chain Transparency Act of 2025 (e.g., on ingredients, manufacturing practices, or disclosures); and (3) adding subchapter B, “Supply Chain Transparency,” with section 621 defining terms including brand owner, flavor or fragrance company, formulating laboratory, harmful to human health or the environment (i.e., certain toxicants, allergens, or carcinogens on specified lists), ingredient, incidental component, manufacturer, nonfunctional constituent, and raw material.