sunscreen – n. a lotion that you put on your skin to prevent sunburn by blocking out some of the sun's rays

regulation – an official rule or law that says how something should be done

absorb – v. to take in (something, such as a liquid) in a natural or gradual way

clinician – n. a person (such as a doctor or nurse) who works directly with patients rather than in a laboratory or as a researcher

evaluate – v. to judge the value or condition of (someone or something) in a careful and thoughtful way

benefit – n. something that produces good or helpful results or effects or that promotes well-being

advocacy – n. the act or process of supporting a cause or proposal

ingredients – n. one of the things that are used to make a food or product

apply – v. to lay or spread on

certain – adj. known but not named