Healty volunteers
Conditions
Interventions
Examined sample: Apply cosmetics containing stable neutral vitaminC derivative for 24 weeks
Apply placebo cosmetic product for 24 weeks
Sponsors
Inforward, inc.
Eligibility
Sex/Gender
Female
Inclusion criteria
Inclusion criteria: 1.Those who indicate their intention to participate in the study, understand the explanation, and can obtain written consent to participate in the study. 2.Healthy Japanese women between the ages of 20 and 55 who do not meet the exclusion criteria. 3.Persons who can write on documents such as consent forms, questionnaire forms, diaries, etc. 4.Those who can come to the designated facility on the measurement date. 5.Persons with lentigo senilis on the left and right sides of the face.(The stain level is about 1 to 3.) 6.Those who are conscious of dry skin. 7.Those who do not currently use products intended for whitening effect. Subjects who have never had rough skin when using products with a whitening effect in the past. 8.People whose daily care after washing their face is limited to using lotion or emulsion.
Exclusion criteria
Exclusion criteria: 1.People with severe hay fever. 2.Those who are being treated for chronic skin diseases such as atopic dermatitis. 3.Subjects who are likely to expose the test site to sunlight during the test period.(Daily outdoor sports, etc.) 4.Those who have taken medicines containing tranexamic acid, vitamin C, or L-cysteine for skin whitening within 2 months before the start of the study. 5.Persons who have had allergic symptoms to cosmetics, etc. in the past. 6.People who regularly drink large amounts of alcohol. 7.Those who have a history of serious gastrointestinal disorder, liver disorder, renal disorder, myocardial infarction, mental illness, etc. 8.Persons with severe anemia. 9.Those who are currently pregnant, breastfeeding, or wish to become pregnant during the study period. 10.Those who have a family member working for a pharmaceutical manufacturer or cosmetics company. 11.Those who are currently participating in clinical trials, usage surveys, and product monitors for cosmetic products, pharmaceuticals, etc., or those who have participated within the last three months. 12.Subjects who are otherwise ineligible for participation in this study by the investigater.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Observing changes in stains | — |
Countries
Japan
Contacts
Public ContactKanako Sakurai
Inforward, inc. EBISU skin research center
Outcome results
None listed