# The Problem of the Presence of DNA in Cosmetic and Medicinal Products Obtained from Animals on the CITES List

## TL;DR

This study shows how DNA testing can reveal hidden animal ingredients in medicines and cosmetics, raising concerns about transparency and ethics.

## Contribution

The study demonstrates the feasibility of using DNA-based methods to detect undeclared animal-derived substances in processed consumer products.

## Key findings

- DNA from American mink and domestic pig was detected in the tested products.
- No DNA from the target CITES-listed species was found.
- The findings highlight ethical concerns for consumers with dietary restrictions.

## Abstract

Background: The illegal trade in wildlife remains a critical threat to biodiversity, prompting the development of international regulatory frameworks such as the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). One of the key challenges in enforcement is the detection of CITES-listed species in highly processed consumer goods. Methods: This study investigates the use of molecular techniques to detect animal DNA in two selected commercially available medicinal products—a balm and a gel—marketed with ingredients suggestive of protected species such as the brown bear (Ursus arctos) and the medicinal leech (Hirudo medicinalis). Results: Although DNA from these target species was not detected, the analysis revealed the presence of genetic material from the American mink (Neovison vison) and domestic pig (Sus scrofa), indicating the undeclared use of animal-derived substances. While limited in scope, these findings suggest potential ethical and transparency concerns, particularly for consumers adhering to vegetarian, vegan, or religious dietary practices. Conclusions: The study illustrates the feasibility of applying DNA-based screening methods in complex, degraded matrices and their potential as supportive tools in consumer product assessment. However, broader studies are necessary before drawing general regulatory or conservation conclusions.