Efficacy Evaluation Study of Vitamin C and Glutathione Liquid Sachet

Efficacy Evaluation Study of Vitamin C and Glutathione Liquid Sachet

The objective of this study is to evaluate the effect of liquid vitamin C and glutathione supplements on human skin condition improvement and anti-oxidation.

This study is a single-center, placebo-controlled, double-blinded, parallel human trial designed to evaluate the skin beauty and anti-oxidant effect of liquid vitamin C and glutathione supplements.

Healthy adult participants aged 18-65 years will be enrolled. Participants will be informed to consume test samples daily for 12 consecutive weeks. Skin measurement and self-assessment questionnaires will be conducted at baseline (before intake), after 4, 8 weeks, and 12 weeks of consumption. Fasting blood samples will be collected at baseline and after 12 weeks of consumption.

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