Effect of Vitamin C-containing patch cosmetics on pigmentation

Effect of Vitamin C-containing patch cosmetics on pigmentation : single blinded study - Effect of Vitamin C-containing patch cosmetics on pigmentation

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000044684

Enrollment

Registered

2021-06-29

Start date

2021-06-29

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Healthy adult female

Interventions

Use 1 type of test article A (patch cosmetics) Use 1 type of test article B (all-in-one gel) Uses 2 types of test articles (patch cosmetics, all-in-one gel)

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: Subjects whose pigmentation class is 3 to 6

Exclusion criteria

Exclusion criteria: 1. Subjects with cosmetic allergies 2. Subjects who are pregnant or lactating 3. Subjects with inflamed or scraped skin on face 4. Subjects who are judged as unsuitable for the study by the investigator for the other reason

Design outcomes

Primary

Measure	Time frame
Image evaluation (after 12, 24, 30, 36 weeks)	—

Secondary

Measure	Time frame
the condition of the stratum corneum	—

Countries

Japan

Contacts

Public ContactTakeshi Kaneko

Japan Clinical Trial Association N.A.

info@yakujihou.org0364574666

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026