Observation of the safety and efficacy of vitamin C (C20) combined with retinol 1.0 on hyperpigmentation after inflammation

Status

Recruiting

Phases

Phase 4

Study type

Interventional

Source

ChiCTR

Registry ID

ChiCTR2100051389

Enrollment

Unknown

Registered

2021-09-22

Start date

2021-10-01

Completion date

Unknown

Last updated

2022-06-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Postinflammatory hyperpigmentation

Interventions

Experimental group:Vitamin C (C20) in combination with retinol 1.0

Eligibility

Sex/Gender

All

Age

18 Years to 65 Years

Inclusion criteria

Inclusion criteria: 1.Hyperpigmentation after inflammation was diagnosed according to Clinical Dermatology; 2.Men and women, aged 18 to 65 years; 3.Be able to follow visitors on time; 4.Informed consent to this study, and voluntarily participate in the signing of informed consent and portrait right use consent.

Exclusion criteria

Exclusion criteria: 1.A history of exposure in the past 1 month; 2.In pregnancy, lactation, ready for pregnancy; 3.There are other systemic diseases; 4.There are skin diseases that affect the observation of curative effect (such as dermatitis, eczema, vitiligo, etc.); 5.Light sensitive; 6.Use other treatment methods (drugs, skin care products, photoelectric therapy, etc.) after diagnosis; 7.Subjects have a history of skin allergy or other severe allergies.

Design outcomes

Primary

Measure	Time frame
colored patches;wrinkles;pore size;texture;	—

Countries

China

Contacts

Public ContactLiu Zhenfeng

Dermatology Hospital of Southern Medical University

liuzhenfengpuma@163.com+86 18011788797

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026