Determination of the antioxidative potential of the skin before and after ingestion of green tea

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00011212

Enrollment

Registered

2016-10-28

Start date

2015-10-16

Completion date

Unknown

Last updated

2025-10-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

oxidative Stress

Interventions

Group 1: Water (control group), 3 cups/day for 14 days Group 2: freshly brewed Yabukita tea, 3 cups/day for 14 days Group 3: freshly brewed Benifuuki tea, 3 cups/day for 14 days

Eligibility

Sex/Gender

All

Age

18 Years to 60 Years

Inclusion criteria

Inclusion criteria: Healthy individuals aged between 18 and 60 years who have given their informed consent were admitted.

Exclusion criteria

Exclusion criteria: Exclusion criteria: skin diseases or skin barrier disorders, metallic implants in the forearms, adverse reactions to cosmetics, allergies and food intolerances, pregnancy and lactation, subjects unable to make decisions for themselves.

Design outcomes

Primary

Measure	Time frame
Radical scavenging activity in the skin at baseline and after 14 days, measured with electron paramagnetic resonance spectroscopy	—

Secondary

Measure	Time frame
Carotenoid content of the skin at baseline and after 14 days, measured with resonance Raman spectroscopy	—

Countries

Germany

Contacts

Public ContactInna Megow

Charité-Universitätsmedizin BerlinKlinik für Dermatologie, Venerologie und Allergologie

inna.megow@charite.de030 450 518 208

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026