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This double-blinded, randomized, placebo-controlled study aimed to evaluate the efficacy and safety of AP collagen peptides (APCP) containing 3% Glycine-Proline-Hydroxyproline (GPH) on improving skin health. Subjects with dried skin were randomly assigned to receive placebo or APCP once daily for 12 weeks.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| AP collagen peptide | Experimental | Each subject takes one active bottle per day for 12 weeks. Each bottle contains AP collagen 1000 mg |
|
| Placebo | Placebo Comparator | Each subject takes one active bottle per day for 12 weeks. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| AP collagen peptide | Dietary Supplement | Health functional food |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Change from baseline in epidermal hydration | skin hydration measured by MoistureMeter-D compact | Baseline, 12 week |
| Measure | Description | Time Frame |
|---|---|---|
| Change from baseline in skin roughness (texture) | skin roughness measured by PRIMOS | Baseline, 12 week |
| Change from baseline in skin gloss | skin roughness measured by Skinglossmeter |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Hae Kwang Lee, PhD | P&K Skin Research Center | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| P&K Skin Research Center | Seoul | 07236 | South Korea |
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| Placebo |
| Dietary Supplement |
placebo |
|
| Baseline, 12 week |
| Change from baseline in stratum corneum condition | stripped using 10 tape strips (D-Squame) and measured by VisioScan | Baseline, 12 week |
| Change of Ceramides in stratum corneum | ultra-performance liquid chromatography system etc. | Baseline, 12 week |
| Change of Natural moisturizing factor in stratum corneum | Ultra-performance liquid chromatography system etc. | Baseline, 12 week |
| Change from baseline in TEWL | Transepidermal water loss measured by vapometer | Baseline, 12 week |