Cosmetic product testing is a fundamental requirement to ensure the safety, stability, and efficacy of cosmetic formulations prior to market placement. These tests provide scientific evidence that the product is safe for use under normal or reasonably foreseeable conditions and that it performs as intended. 

The most common cosmetic product tests

• Stability test ensures that a cosmetic product maintains its quality, consistency, and safety throughout its intended shelf life under various storage conditions. Based on the test results the shelf life and expiry date of the cosmetic product is determined. It is required for all cosmetic products. Guidelines_on_Stability_Testing_of_Cosmetics_CE-CTFA_-_2004
• Compatibility test (Packaging Interaction Test) verifies that the product formulation does not react with its packaging (migration or degradation does not happen). It is required for all cosmetic products.
• Challenge test (PET/Preservative Efficacy Test) confirms that the product can resist microbial contamination during storage and use. It is required for water-based and emulsified products (creams, lotions, gels, etc.).
• Patch test (Dermatological Test / Skin Irritation Test) ensures that the product does not cause skin irritation or allergic reactions under normal use. During the test, the skin’s response is evaluated either on human volunteers or using reconstructed human epidermis models.
• SPF/UVA test measures how effectively a sunscreen or cosmetic with UV filters protects against UV radiation.
During the test, SPF level (UVB protection), UVA protection factor, and water resistance values are determined. It is required for sunscreens and any cosmetic product with SPF claims.
• Efficacy and Claim Support tests validates the performance claims on your product label. For example, if the packaging claims “Moisturises for 24 hours,” a hydration test is required to substantiate the claim. Similarly, for a “Brightening” claim, a skin tone analysis test would be needed. It is needed for any product making measurable performance or functional claims.
Learn more on the EU Guidance on Cosmetic Claims (Commission Regulation 655/2013).