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Clinical observation on the efficacy of vitamin C and vitamin E in preventing pigmentation after Q-switched 532nm laser treatment for freckles

Randomized controlled study on the efficacy of vitamin C and vitamin E in preventing pigmentation after Q-switched laser freckle removal

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2500099156
Enrollment
Unknown
Registered
2025-03-19
Start date
2025-03-25
Completion date
Unknown
Last updated
2025-03-24

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

Conditions

pigmentation

Interventions

Vitamin C group :Subjects in the income group began taking oral medication on the day after undergoing photoelectric therapy. According to the randomization results, the VC group took 3 vitamin C tabl
Vitamin C + Vitamin E group :Subjects in the income group began taking oral medications on the day following photoelectric therapy, according to the randomized grouping results. The VC+VE group was i
blank group:Subjects in the income group began taking oral medication on the day after undergoing photoelectric therapy, according to the randomized grouping results. The control group did not take or

Sponsors

The Second Affiliated Hospital of Nanchang University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 60 Years

Inclusion criteria

Inclusion criteria: 1. Age between 18 and 60 years old; 2. Confirmed as freckles, with spots on both sides of the face; 3. With or without melasma; 4. Preparing to use the Cynergy Medlite-C6 laser device for freckle removal; 5. Sign the informed consent form.

Exclusion criteria

Exclusion criteria: 1. Pregnant or lactating women; 2. Suffering from mental illness; 3. People with diseases that are advised to be cautious when using vitamin C and vitamin E: cystinuria, gout, hyperoxaluria, oxalate deposition disease, urate kidney stones, diabetes, glucose-6-phosphate dehydrogenase deficiency, hemochromatosis, sickle cell anemia, iron deficiency anemia. 4. Individuals allergic to vitamin C and vitamin E 5. Subjects with skin diseases that may affect the assessment of treatment efficacy in the treatment area, such as extensive scarring or skin diseases, a history of skin tumors, or the presence of extensive active inflammation and/or unhealed wounds; 6. Patients with photosensitive diseases and those who have been exposed to sunlight within the past month; 7. Using topical medications (such as hydroquinone, levo-vitamin C, etc.) or oral medications (such as contraceptives, corticosteroids, isotretinoin, etc.) that may affect pigmentation within one month before and after laser treatment. 8. Any treatment that may affect pigmentation (such as acid, intense pulsed light, etc.) within 1 month before and after laser treatment 9. Participated in other clinical studies within the past month; 10. Subjects whom the researcher deems unsuitable for participation in this clinical study

Design outcomes

Primary

MeasureTime frame
Hyperpigmentation Area and Severity Index;

Countries

China

Contacts

Public ContactYangyan Yi

The Second Affiliated Hospital of Nanchang University

yyy02180422@163.com+86 135 0791 3766

Outcome results

None listed

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