What is vitamin C and glutathione liquid sachet studying for skin condition?

This trial is studying how liquid vitamin C and glutathione supplements may affect skin appearance and antioxidant levels. Researchers want to see if these supplements improve skin tone, spots, and reduce oxidative stress. The study is sponsored by TCI Co., Ltd. to better understand these potential effects in healthy adults.

Who may be eligible for this skin condition clinical trial?

Adults aged 18 to 65 years who are healthy without skin or systemic disorders may be eligible. Participants must not be pregnant or breastfeeding and should not have used medications affecting skin recently. They also should not have allergies to cosmetics, medications, or certain foods. Please review eligibility criteria for more details.

Is there any cost to participate in this skin condition clinical trial?

Study-related care, including the study supplements and all trial visits, is provided at no cost. Personal travel expenses may vary and are not guaranteed to be covered. Participants should plan accordingly for any costs related to travel or accommodation.

Actively Recruiting

Phase Not Applicable

Age: 18Years - 65Years

All Genders

Healthy Volunteers

ID07379216

Study to Test the Effects of Daily Vitamin C and Glutathione Liquid Supplements on Skin Health and Antioxidant Levels in Adults Aged 18 to 65

Led by TCI Co., Ltd. · Updated on 2026-02-04

Participants Needed

Research Sites

2 weeks

Total Duration

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

Age: 18Years - 65Years

All Genders

Healthy Volunteers

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

Research Team

Chia-Hua Liang, Ph.D.

Ping Lin

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