Liquid vitamin C and glutathione sachets for skin health

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a single-center, double-blinded, placebo-controlled, parallel trial of daily liquid vitamin C and glutathione sachets taken for 12 consecutive weeks. Healthy adults aged 18–65 will be randomized to active or placebo and asked to avoid other skin-active products during the study. Skin measurements and self-assessment questionnaires will be collected at baseline and at 4, 8, and 12 weeks, with fasting blood samples at baseline and week 12 to measure antioxidant markers. The trial aims to link objective skin measurements and blood antioxidant changes to supplementation over a three-month period.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Healthy male or female adults, aged 18-65 years old;
* Commitment not to use products having activity comparable with that of the product to be tested during the study period;
* Free of any dermatological or systemic disorder that would interfere with results.

Exclusion Criteria:

* Subject with obvious skin surface damage;
* Subject who had oral or topical medication which may affect skin condition within 1 month;
* Individuals with known allergies to cosmetics, medications, or foods (especially those allergic to legumes/soy);
* Pregnant or breastfeeding individuals;
* Received facial laser therapy, chemical peeling in the past 2 months.
* Individuals unwilling to allow publication or public disclosure of photographs taken as part of the study results

Where it's running

• Chia Nan University of Pharmacy & Science
  Pingtung City, Taiwan Recruiting

Study contacts

• Principal investigator: Chia-Hua Liang, Ph.D. — Chia Nan University of Pharmacy ＆ Science
• Study coordinator: Chia-Hua Liang, Ph.D.
• Email: tinna_ling@mail.cnu.edu.tw
• Phone: +886-06-2664911

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.