Healthy adults
Conditions
Interventions
Use shampoo A on head once a day for 4 weeks each
Use shampoo B on head once a day for 4 weeks each
Sponsors
SOUKEN
Eligibility
Sex/Gender
Female
Inclusion criteria
Inclusion criteria: -Healthy females aged 20 to 49 living in Tokyo suburbs -Subjects who wash their hair more than 6 days a week -Subjects who can accommodate restrictions (prohibition of hair coloring, bleaching, perm) during the period of participation -Subjects who can provide consent on a voluntary basis before this study starts
Exclusion criteria
Exclusion criteria: -Subjects with suspected skin allergy, cutaneous hypersensitivity -Subjects with severe hay fever -Subjects who could cause skin allergy by shampoo, hair conditioner or scalp lotion -Subjects whose skin turns red with ethanol -Subjects with external injury, surgical treatments on test area -Subjects with atopic dermatitis, seborrheic dermatitis on test area -Subjects with highly exposed to sun light -Subjects whose hair was chemically treated within one week before the start of this study -Subjects who have rapid hair loss or hair missing in a patchy shape -Subjects who use pharmaceuticals, hair growth agents, tonics, moisturizers, etc. on the scalp -Subjects who regularly take vitamins and other supplements that can exhibit anti-inflammatory and dandruff-related efficacy -Subjects who use products containing carbon dioxide (shampoos, hair conditioners, etc.) on the scalp -Subjects who are pregnant or willing to become pregnant or are breastfeeding during the period of participation -Subjects who are going to the hospital or taking medication due to chronic illness -Subjects who have had strong symptoms such as shortness of breath (difficulty breathing), strong fatigue, or high fever within the past 2 weeks -Subjects who are considered to have had close contact with a COVID-19 patient from the public health center -Subjects who have get a COVID-19 vaccine within the past one week. -Subjects or her family members work for a company related to the manufacture and sale of pharmaceuticals, cosmetics, toiletry products, etc. -Subjects who participate in other surveys or studies -Subjects who plan to participate in other studies or surveys during the study period -Subjects deemed inappropriate to participate in this study by the person involved in the study
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Scalp physicality, surface ingredients After use of placebo shampoo for 4 weeks, evaluate the dandruff and scalp itchiness before and after use of test shampoos for 4 weeks | — |
Countries
Japan
Contacts
Public ContactAtsuko Ebato
Kao Corporation R&D, Hair Care Products Research
Outcome results
None listed