Efficacy Testing of Hibiscus Sabdariffa Extract and Collagen Products

Efficacy Testing of Hibiscus Sabdariffa Extract and Collagen Products

To assess Hibiscus sabdariffa extract and collagen products on skin condition improvement

Inclusion Criteria:

• Healthy adults aged above 20 years old

Exclusion Criteria:

• Subject who is not willing to participate in this study.
• Patients with diseases of the skin, liver, kidney.
• Subjects who have known cosmetic, drug or food allergies, difficulty in digestive tract absorption or disorder.
• Female who is pregnant or nursing or planning to become pregnant during the course of the study.
• Received facial laser therapy, chemical peeling or UV overexposure (> 3 hr/week) in the past 4 weeks.
• Constant drug use
• Students who are currently taking courses taught by the principal investigator of this trial.