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L-Theanine to Support Relaxation and Mood for Cancer Patients in Surveillance

Investigating the Feasibility and Relationship of L-Theanine in Supporting Relaxation and Mood in Cancer Patients in Surveillance

Status
Recruiting
Phases
Early Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07220447
Enrollment
50
Registered
2025-10-24
Start date
2026-04-21
Completion date
2027-07-09
Last updated
2026-05-08

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

Conditions

Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm

Brief summary

This clinical trial tests the feasibility, best dose, and effectiveness of L-theanine for supporting relaxation and mood among cancer patients in surveillance. L-theanine is a substance found in the leaves of green tea with potential to enhance mental health and well-being. It works by increasing certain chemicals within the body that have been associated with stress reduction, mood stabilization, and improved cognitive performance.

Detailed description

PRIMARY OBJECTIVES: I. To determine the feasibility of L-theanine use among cancer patients in surveillance based on adherence. II. To determine the relationship of L-theanine on relaxation and supporting mood among cancer patients in surveillance with a dose of 200mg once daily versus (vs) twice daily, as measured by Visual Analog Scale-Relaxation (VAS-R). SECONDARY OBJECTIVES: I. To observe the relationship of L-theanine in reducing anxiety among cancer patients in surveillance, as measured by Visual Analog Scale-Anxiety (VAS-A). II. To observe the relationship of L-theanine on mood states as measured by Short Form of the Profile of Mood States (POMS-SF). EXPLORATORY OBJECTIVES: I. To determine the feasibility of L-theanine use among cancer patients in surveillance based on recruitment. II. To observe the relationship of L-theanine in supporting sleep among cancer patients in surveillance as measured by the Pittsburgh Sleep Quality Index (PSQI). III. To describe the side effects of L-theanine supplementation. IV. To observe the relationship between L-theanine on symptom burden among cancer patients in surveillance as measured by Edmonton Symptom Assessment Scale (ESAS). OUTLINE: Patients are randomized to 1 of 2 arms. ARM I: Patients receive L-theanine orally (PO) once daily (QD) for 6 weeks in the absence of unacceptable toxicity. ARM II: Patients receive L-theanine PO twice daily (BID) for 6 weeks in the absence of unacceptable toxicity. After completion of study intervention, patients are followed up at 14 days.

Interventions

OTHERSurvey Administration

Ancillary studies

Given L-theanine PO

Sponsors

City of Hope Medical Center
Lead SponsorOTHER
National Cancer Institute (NCI)
CollaboratorNIH

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
SUPPORTIVE_CARE
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Documented informed consent of the participant and/or legally authorized representative. * Assent, when appropriate, will be obtained per institutional guidelines * Willingness to comply with all study interventions including the use of L-theanine and follow-up assessments * Age: ≥ 18 years * Ability to read and understand English or Spanish for questionnaires * Patients must be a cancer patient who has completed treatment and has been in surveillance for at least 6 months * Participants must not have used any herbs or supplements in the past 30 days * Participants must report an anxiety score of \> 3 on Visual Analog Scale - Anxiety * Participants must not have had any changes to their psychiatric medications within the past 60 days * Women of childbearing potential (WOCBP): negative urine or serum pregnancy test. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required * Agreement by females and males of childbearing potential to use an effective method of birth control or abstain from heterosexual activity for the course of the study through at least 1 month after the last dose of protocol therapy. * Childbearing potential defined as not being surgically sterilized (men and women) or have not been free from menses for \> 1 year (women only)

Exclusion criteria

* Concurrent use of other alternative medicines, including herbal agents and high-dose vitamins and minerals, unless taken to correct a documented vitamin or mineral insufficiency * Chemotherapy, radiation therapy, biological therapy, immunotherapy, or any other systemic treatment excluding hormonal therapy (must be on a stable dose of hormonal therapy for at least 60 days) * Any patients taking bortezomib, as L-theanine can decrease effectiveness * Any patients currently enrolled in other clinical trials that might interfere with the results of this study * History of allergic reactions attributed to compounds of similar chemical or biologic composition to study agent * Any patients with an ongoing active/unstable psychiatric condition, depressive/bi-polar related disorders, anxiety, psychosis disorders, or substance use that may interfere with the ability to participate in the study as outlined in the study procedures section of the protocol * Any patients with chronically unstable blood pressure or chronic low blood pressure * Diagnosis of Gilbert's disease * Females only: Pregnant or breastfeeding * Any other condition that would, in the Investigator's judgment, contraindicate the patient's participation in the clinical study due to safety concerns with clinical study procedures * Prospective participants who, in the opinion of the investigator, may not be able to comply with all study procedures (including compliance issues related to feasibility/logistics)

Design outcomes

Primary

MeasureTime frameDescription
Adherence ratesUp to 8 weeksWill consider the study feasible if at least 75% of enrolled participants adhere to the planned intervention. Adherence will be defined as having at least 75% study drug accountability. Will be estimated along with the 95% exact binomial confidence interval.
Perceived levels of relaxationFrom baseline to day 42Measured via Visual Analog Scale-Relaxation (VAS-R). Response is defined as a favorable change of at least 1.5 points on the VAS-R. Will be estimated along with the 95% exact binomial confidence interval. Within-group mean changes in VAS-R will be examined using paired t-tests (comparing any two time points of interest).

Secondary

MeasureTime frameDescription
Self-perceived anxietyFrom screening to day 42Assessed via Visual Analog Scale-Anxiety. Within-group mean changes will be examined using paired t-tests (comparing any two time points of interest). Between-group mean changes will be evaluated at each time point using independent-samples t-tests.
Anxiety and depressionFrom baseline to day 42Assessed via Hospital Anxiety and Depression Scale. Within-group mean changes will be examined using paired t-tests (comparing any two time points of interest). Between-group mean changes will be evaluated at each time point using independent-samples t-tests.
Transient mood statesFrom baseline to day 42Assessed via Short Form of the Profile of Mood States that includes tension-anxiety, depression-dejection, anger-hostility, vigor-activity, fatigue-inertia, and confusion-bewilderment. Within-group mean changes will be examined using paired t-tests (comparing any two time points of interest). Between-group mean changes will be evaluated at each time point using independent-samples t-tests.

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORErica Veguilla

City of Hope Medical Center

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 9, 2026