Inclusion Criteria:  Healthy volunteers aged above 20 years old Subject has dull skin.  Exclusion Criteria:  .Subject with diseases of the skin, heart, liver, kidney, endocrine and other organs and patients with mental illness (according to medical history). 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 in the past 4 weeks. Subjects who have large spots (area >3 square centimeter) or abnormal acne.