Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Clinical Trial
. 2004 Aug;43(8):604-7.
doi: 10.1111/j.1365-4632.2004.02134.x.

A double-blind randomized trial of 5% ascorbic acid vs. 4% hydroquinone in melasma

Affiliations
Clinical Trial

A double-blind randomized trial of 5% ascorbic acid vs. 4% hydroquinone in melasma

Liliana Elizabeth Espinal-Perez et al. Int J Dermatol. 2004 Aug.

Abstract

Background: Melasma is an acquired treatment-resistant hyperpigmentation of the skin.

Methods: Sixteen women with idiopathic melasma were included in our trial. After randomization by another clinician, they were instructed to use, at night, 5% ascorbic acid cream on one side of the face and 4% hydroquinone cream on the other side, for 16 weeks. Sunscreen was applied daily throughout the period of observation. They were evaluated every month by colorimetry, digital photography, and regular color slides. Subjective evaluation by each patient was also taken into account.

Results: The best subjective improvement was observed on the hydroquinone side with 93% good and excellent results, compared with 62.5% on the ascorbic acid side (P < 0.05); however, colorimetric measures showed no statistical differences. Side-effects were present in 68.7% (11/16) with hydroquinone vs. 6.2% (1/16) with ascorbic acid.

Conclusion: Although hydroquinone showed a better response, ascorbic acid may play a role in the therapy of melasma as it is almost devoid of side-effects; it could be used alone or in combination therapy.

PubMed Disclaimer

Similar articles

Cited by

Publication types

LinkOut - more resources