260
Participants
Start Date
October 31, 2011
Primary Completion Date
May 31, 2012
Study Completion Date
August 31, 2012
10% lactic acid test
To each subject, 10% lactic acid is applied to one nasolabial fold. This will be performed under humidity, temperature and pH control to avoid influence of these variables in the result of the test.
Placebo
To each subject, 0.9% saline solution will be applied to the contralateral nasolabial fold. This will be performed under humidity, temperature and pH control to avoid influence of these variables in the result of the test.
"Dermatology Department. Hospital Central Dr. Ignacio Morones Prieto", San Luis Potosí City
"Hospital Central Dr. Ignacio Morones Prieto"
OTHER
Universidad Autonoma de San Luis Potosí
OTHER