Effects of Oral Collagen Drinks on Human Skin

Inclusion Criteria:

• Healthy Chinese subjects aged 18 to 60 years, both male and female.
• Wrinkle Severity: Crow's feet graded 2-4; under-eye fine lines graded 2-5; nasolabial folds graded 1-3.
• Presence of facial skin laxity and sagging.
• Ability to undergo skin examinations and pre-treatment in the designated test areas.
• Ability to understand the trial process, participate voluntarily, and sign a written Informed Consent Form (ICF).

Exclusion Criteria:

• Pregnant or lactating women, or those planning to become pregnant in the near future.
• Highly sensitive constitution, history of allergic diseases, or history of allergies to cosmetics.
• Presence of skin diseases (e.g., psoriasis, eczema, atopic dermatitis, severe acne) or other chronic systemic diseases.
• Skin conditions in the test area such as birthmarks, hyperpigmentation, inflammation, scars, nevi (moles), or hypertrichosis (excessive hair).
• Use of anti-inflammatory drugs (e.g., oral or topical corticosteroids) within the past month.
• Use of cosmetics or other products with similar efficacy within the past 2 weeks.
• Participation in other human clinical trials for cosmetics within the past month.
• Any other conditions deemed unsuitable for participation based on clinical assessment.