The Effect of White Tea in Healthy Human Subjects

NCT ID: NCT07344688

Last Updated: 2026-01-15

Basic Information

• Recruitment Status: ACTIVE_NOT_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 19 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2026-01-05
• Study Completion Date: 2026-04-30

Brief Summary

This clinical study aims to determine the effects of consuming white tea infusion (Camellia sinensis) on healthy subjects over a period of 14 days. The main questions it aims to answer are:

1. Determine the effect of white tea consumption on the anthropometry of healthy subjects.

2. Determine the effect of white tea consumption on the biochemical parameters of healthy subjects.

3. Determine the effect of white tea consumption on hematology parameters that are related to anemia case in healthy subjects.

4. Determine the effect of white tea consumption on the activity of first-line antioxidant enzymes in healthy subjects

Researchers used only one treatment group, and respondents knew which treatment they would receive (single-arm and open-labelled), namely white tea infusion to maintain human body health. Participants will:

1. Follow the washout stage for 7 days

2. Drink white tea infusion every day for 14 days.

3. Follow up to monitor adverse effects after consuming white tea; this stage will be conducted for 7 days.

4. Report all food and beverages consumed by respondents during the study.

Detailed Description

Unhealthy lifestyles, including alcohol consumption, illegal drug use, radiation exposure, and the preparation of food (e.g. smoked meat, used oil, and fat) and polluted environments (water and air pollution) are triggering an increase in cases of degenerative diseases worldwide, including ischaemic heart disease, diabetes, cancer, atherosclerosis, liver disease, kidney disease, chronic obstructive pulmonary disease, and others. The body's natural defences can decline at any time due to the development of reactive oxygen species (ROS) caused by unhealthy lifestyle factors and environmental pollution. Exogenous antioxidants are important for maintaining the body's defence system against excessive ROS. This study will examine the potential of compounds in white tea infusion in maintaining human health by monitoring several parameters, including anthropometric, biochemical, haematological, and antioxidant enzyme activity. The anthropometric parameters tested include body weight, height, waist circumference, systolic blood pressure, and diastolic blood pressure. Biochemical parameters include lipid profile (total cholesterol, low-density lipoprotein (LDL), high-density lipoprotein (HDL), and triglycerides), alanine aminotransferase (ALT), aspartate aminotransferase (AST), serum creatinine levels, estimated glomerular filtration rate (eGFR), and urea nitrogen levels. The haematological parameters used are directly related to the indication of anaemia, including red blood cell count, haemoglobin, haematocrit, mean corpuscular haemoglobin (MCH), and mean corpuscular volume (MCV). Finally, there are the first-line antioxidant enzyme activity parameters, including superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx). This examination was conducted before and after the 14-day white tea infusion treatment to observe the effects of the treatment. Male and female healthy volunteers were instructed to follow three stages of research, including:

1. Washout phase : respondents are advised to avoid products with high polyphenol content such as turmeric, ginger, galangal, grapes, apples, oranges, coffee, other types of tea, and chocolate, either directly or in processed products.

2. Treatment phase: respondents continue to avoid the products avoided during the washout process. In this phase, respondents will consume white tea infusion (4 grams of WT in 200 mL of freshly boiled water) every day for 14 days.

3. Observational phase: the phase is conducted for 7 days to monitor the presence or absence of side effects after 14 days of consuming white tea infusion.

Conditions

Healhty

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: SUPPORTIVE_CARE
• Blinding Strategy: NONE

Study Groups

White tea intervention

Nineteen respondents will be given 200 mL of white tea (4 grams of white tea sample in 200 mL of water at a temperature of 95-98°C) for 14 days after a 7-day washout period. In the final stage, all respondents will undergo an observation phase. In the final stage, all respondents are required to submit updates on their physical condition. If they experience discomfort such as nausea, dizziness, or general unease, the respondents will be examined by the research physician. In our study, no control group was used. To demonstrate the effect of white tea on the respondents' health condition, we compared the results before and after the treatment.

Group Type: EXPERIMENTAL

White tea intervention

Intervention Type: OTHER

1. White tea infusion was prepared by brewing 4 grams of white tea in 200 mL of hot water.

2. Healthy respondents were asked to consume the white tea infusion for 14 days.

3. The focus of this study was to observe the effect of white tea infusion on antioxidant enzyme activity and its relationship with anthropometric, biochemical, and haematological parameters.

Interventions

White tea intervention

1. White tea infusion was prepared by brewing 4 grams of white tea in 200 mL of hot water.

2. Healthy respondents were asked to consume the white tea infusion for 14 days.

3. The focus of this study was to observe the effect of white tea infusion on antioxidant enzyme activity and its relationship with anthropometric, biochemical, and haematological parameters.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

1. The participants are the community around Padjadjaran University with an age range of 20 - 35 years old. Female respondents were unmarried.

2. The participants are non-smoker.

3. The participants should have no history of anemia, chronic disease, hepatic and renal dysfunction.

4. The participants are willing to follow the research process until its finish by signing an informed consent form.

Exclusion Criteria

1. The participants who are undergoing drug therapy and taking vitamin supplements.

2. The participants who failed due to illness or are unable to continue the examination to the end.

3. Respondents with pre-treatment biochemical results not within the normal range

• Minimum Eligible Age: 20 Years
• Maximum Eligible Age: 35 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Universitas Padjadjaran

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Gofarana Wilar, Ph.D.

Role: STUDY_DIRECTOR

Faculty of Pharmacy, Universitas Padjadjaran, Bandung, Indonesia

Locations

Faculty of Pharmacy, Padjadjaran University

Sumedang, West Java, Indonesia

Countries

Indonesia

Provided Documents

Document Type: Study Protocol and Statistical Analysis Plan

View Document

Other Identifiers

PHAR.202509-01

Identifier Type: -

Identifier Source: org_study_id