The goal of this clinical trial is to learn if an anti-redness emulsion can help lower facial redness caused by heat in healthy adult women. The main questions it aims to answer are:

• Does the anti-redness emulsion lower facial redness better than purified water?
• Is the product safe and comfortable to use?

Researchers will compare the anti-redness emulsion to purified water using a split-face method.

Participants will:

• Receive infrared light on their face to trigger redness
• Apply the anti-redness emulsion to one side of their face and purified water to the other side
• Have their facial redness measured at different time points using photography, imaging devices, and skin redness tests
• Answer questions about their experience with the products

Inclusion Criteria:

1. Chinese women aged from 20-40 years old.
2. Self-declared mild sensitive skin.
3. Self-declare with skin concerns of redness and easy to flush.
4. Willing to be exposed to infrared light on the facial skin to induce facial redness(can tolerate heat sensation on the face).
5. Clinical grading of skin redness (visual) ≥ 4 after infrared light induction (7-8 mins) by dermatologist.
6. No disagreement of dermatologist because of other reasons that exclude the parficipation of the subject.
7. In general good health at the time of the study.
8. Willing and able to participate as evidenced by signing of informed consent and photo release

Exclusion Criteria:

1. Allergic to infrared light
2. Pregnant or breast-feeding woman or woman planning pregnancy during the study.
3. Subject deprived of rights by a court or administrative order.
4. Major subject to a guardianship order.
5. Subject residing in a health or social care establishment.
6. Patient in an emergency setting
7. Subject with a skin disease in the test areas (particularly e.g, acne, rosacea, eczema).
8. Subjects with history, of atopy, allergic reactions, irritation or intense discomfort feelings to topical-use products, medication, cosmetic: or personal care products or ingredients.
9. Subject presenting a stable or progressive serious disease (per investigator's assessment).
10. Immuno-compromised subject.
11. Subject presenting excessive exposure to sunlight or UV radiation (investigator's assessment).
12. Subjects regularly practicing aquatic or nautical sports.
13. Subjects regularly attending a sauna.
14. Subject with cardiovascular or circulatory history.
15. Subject with a history of skin cancer or malignant melanoma.
16. Intake of antihistamines, antibiotics, corticosteroids, non-steroidal anti-inflammatories or immune-suppressants in the last 6 months before study.

This Data Sharing Plan (DSP) aims to promote the open exchange and reuse of de-identified individual participant data (IPD) from cosmetic clinical research, including study protocols, case report forms (CRFs), and statistical analysis plans (SAPs). The shared data will be made available through compliant platforms to eligible researchers in dermatology, cosmetic science, and related fields, following ethical principles and data protection regulations. Users must sign a Data Use Agreement (DUA) to ensure data security, privacy protection, and compliance with research purposes.

18-Month Duration: The data sharing period starts upon study completion and PRS registration completion.

Timeline:

Months 2-3: Data de-identification, metadata preparation, and platform integration.

Month 4: Official launch of data access.

Primary Platform:

ResMan (www.medresman.org.cn) - China's leading medical research data repository.

Eligibility:

Researchers/affiliates from academic institutions, hospitals, or registered research organizations.

Engaged in dermatology, cosmetic science, or related fields. Able to demonstrate ethical compliance and data security capabilities.