Abstrak
ABSTRAK The use of cosmetics, particularly whitening creams, has been progressively increasing among adolescents. One of the active ingredients commonly found in whitening products is hydroquinone, which functions by inhibiting the enzyme tyrosinase involved in the melanin formation process. Although effective, the use of hydroquinone in high concentrations or over extended periods may lead to various adverse effects, such as skin irritation, allergic reactions, and even potential carcinogenic risks. This study aims to assess the level of knowledge among students at SMK N 1 Sewon regarding the presence of hydroquinone in cosmetic products. This research employed a descriptive observational design with a quantitative approach. Data were obtained through the distribution of questionnaires to 125 respondents selected using purposive sampling techniques. The research instrument was tested for validity and reliability, and the data were analyzed based on the respondents’ knowledge scores. The findings revealed that 41 respondents (32.8%) demonstrated a high level of knowledge, 78 respondents (62.4%) showed a moderate level, and 6 respondents (4.8%) exhibited a low level of knowledge. In conclusion, the overall level of knowledge among adolescents at SMK N 1 Sewon regarding hydroquinone content in cosmetics falls within the moderate category.