Actively Recruiting
Efficacy Evaluation Study of Vitamin C and Glutathione Liquid Sachet for Skin Condition and Anti-Oxidative Stress
Led by TCI Co., Ltd. · Updated on 2026-02-04
30
Participants Needed
1
Research Sites
2 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are evaluating the effects of liquid vitamin C and glutathione supplements on improving human skin condition and reducing oxidative stress. This trial is a single-center, placebo-controlled, double-blinded, parallel study involving healthy adults aged 18 to 65 years. The study aims to assess changes in skin beauty and antioxidant markers over a 12-week period. Participants will be randomly assigned to receive either a vitamin C and glutathione liquid sachet or a placebo sachet. Each participant is instructed to consume one sachet daily for 12 consecutive weeks. The trial includes baseline measurements before starting the supplement and follow-up assessments at 4, 8, and 12 weeks. Blood samples will be collected at the beginning and end of the study to evaluate antioxidant levels. Throughout the study, participants will undergo skin measurements and complete self-assessment questionnaires to monitor skin tone, spots, UV spots, hydration, redness, melanin index, elasticity, brown spots, wrinkles, texture, and collagen density. Researchers will also measure antioxidant capacity and related enzymes from blood samples. The total participation duration is 12 weeks, during which safety and effectiveness of the supplements will be monitored.
CONDITIONS
Brief Title
Efficacy Evaluation Study of Vitamin C and Glutathione Liquid Sachet
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Healthy male or female adults aged 18 to 65 years
- Commitment not to use products with similar activity to the test supplements during the study
- Free of any skin or systemic disorders that could affect study results
You will not qualify if you...
- Obvious skin surface damage
- Use of oral or topical medications affecting skin within 1 month
- Known allergies to cosmetics, medications, foods, especially legumes or soy
- Pregnant or breastfeeding individuals
- Received facial laser therapy or chemical peeling within the past 2 months
- Unwilling to allow publication or public disclosure of study photographs
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - 12 weeks
Participants consume 1 sachet of the test samples daily for 12 consecutive weeks. Skin measurements and self-assessment questionnaires are conducted at baseline, and after 4, 8, and 12 weeks of consumption. Fasting blood samples are collected at baseline and after 12 weeks.
4 visits (in-person) including baseline and follow-ups at weeks 4, 8, and 12
Trial Site Locations
Total: 1 location
1
Chia Nan University of Pharmacy & Science
Pingtung City, Taiwan, 928
Actively Recruiting
Research Team
C
Chia-Hua Liang, Ph.D.
P
Ping Lin
How is the study designed?
Study Type
INTERVENTIONAL
Masking
DOUBLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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