Because of the way it is used, what type of product is most vulnerable to contamination?

• A. Sunscreen bottles
• B. Moisturizers
• C. Creams in jars
• D. Testers

Answer: (D)

Contamination risk rises when a product is repeatedly handled by different people. Testers are designed for customers to sample, so they’re touched by many individuals and often used without any sanitation between uses. They’re typically left exposed to the air and to fingers or applicators, which makes it easy for bacteria, fungi, and other contaminants to be introduced and to multiply over time. In comparison, sunscreen bottles are usually used with a cap or pump, limiting contact to a single user, and even jars of moisturizer are only moderately more exposed because they’re closed between uses, though fingers dipping into a jar still pose a risk. Overall, the open, multi-user nature of testers makes them the most susceptible to contamination.