Job Description

This study evaluates the effectiveness of a hair care product in improving hair roughness (cuticle condition) and participant satisfaction after 2 weeks of use on hair damaged by perming, coloring, or heat styling. Total of 2 study visits (July 1, 2026 and July 15, 2026) Each visit is expected to take approximately 30 minutes or less Study product to be used for 2 weeks Approximately 8–10 strands of hair will be collected for evaluation Participation compensation: KRW 60,000 This is a study evaluating the effect of the product on improving hair roughness (cuticle) and participant satisfaction after using the product on hair damaged by perming, coloring, or heat styling for 2 weeks. - Total of 2 visits (July 1, 2026 and July 15, 2026) - Duration per visit: Approximately within 30 minutes - Use of test product for 2 weeks - 8–10 strands of hair to be collected - Participation fee of 60,000 KRW

Qualifications

Female foreign nationals aged 19 to 59. Preference will be given to Caucasian and Hispanic participants (limited openings available for Black participants). Hair length must be at least 10 cm below the ears. Must have undergone a perm or hair coloring treatment within the past 3 months. Must be willing and able to comply with all study instructions throughout the study period. - Foreign females aged 19 to 59 - Preference given to Caucasian and Hispanic participants (limited recruitment for Black participants) - Hair length must be at least 10 cm below the ears - Must have undergone a perm or hair coloring treatment within the past 3 months - Must be able to faithfully comply with all instructions during the study period

Preferred

※ Foreign participants are required to submit relevant documents for income reporting purposes related to compensation payment. ※ Participation may be restricted for applicants with unusual or distinctive hairstyles. ※ Final eligibility will be confirmed and communicated after review by the study coordinator. ※ Foreign participants are required to submit relevant documents for income reporting purposes related to compensation payments. ※ Participation may be restricted for applicants with unusual hairstyles. ※ Final notification regarding eligibility will be provided after verification by the person in charge.

Etc

Clinical study to evaluate the effectiveness of a hair mask in improving damaged hair. Test product will be provided free of charge. Please review the eligibility criteria before applying. Foreign participants are required to submit a copy of their ID and bank account information for compensation payment and income reporting purposes. Compensation: KRW 60,000. Referral bonus: KRW 10,000. If you are interested in participating, please contact us at 010-9277-1304. - Evaluation of efficacy in improving damaged hair - Test product provided free of charge - Must check selection criteria before participation *Required documents include a copy of your bank passbook and ID *If you are interested, please contact us at 010-9421-6463 / bagsuin185@gmail.com

Preferred Visas

Cover Letter

Optional