A Single-Arm Exploratory Study of NatureU Histra Disslove on Chronic Urticaria Symptoms (NUHISTRA)

May 20, 2026 updated by: OmniSolutions Laboratory Holdings Limited

A Single-Center, Open-Label, Single-Arm Exploratory Self-Controlled Study of NatureU Histra Disslove on Urticaria Control, Urticaria Activity, and Dermatology Quality of Life in Adults With Chronic Urticaria Symptoms

This was a single-center, open-label, single-arm, exploratory self-controlled study evaluating NatureU Histra Disslove in adults with chronic urticaria symptoms. Twenty-four participants were screened, 19 participants were enrolled, and 19 participants completed the study and were included in the effectiveness analysis. Participants took one tablet of the study product orally once daily, 20 minutes before a main meal, for 28 consecutive days. Urticaria Control Test, Urticaria Activity Score 7, and Dermatology Life Quality Index assessments were performed at baseline, Day 14, and Day 28. Safety was monitored during the study.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The study was designed as an exploratory human evaluation of a food product containing active diamine oxidase (DAO). Screening was conducted from August 29, 2024 through October 4, 2024. After investigator review of the inclusion and exclusion criteria, 19 adults with chronic urticaria symptoms were enrolled on October 4, 2024. Participants received NatureU Histra Disslove at the study center on Day 0 and took the product continuously for 28 days through Day 28. The protocol specified oral intake of one tablet 20 minutes before a main meal, preferably dinner. Outcome assessments included the Urticaria Control Test (UCT), Urticaria Activity Score 7 (UAS7), and Dermatology Life Quality Index (DLQI) at Day 0, Day 14, and Day 28. Safety monitoring included adverse event collection and laboratory safety assessment. The study was open-label, single-arm, and self-controlled, with no placebo or parallel control group. Analyses were based on participants who completed the study assessments.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
19

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Hunan
      • Yongzhou, Hunan, China, 425300
        • Dao County People's Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Participants who signed informed consent before the study and understood the study content, procedures, and possible adverse reactions.
  2. Adults diagnosed with chronic urticaria by a dermatologist based on clinical symptoms and medical history.
  3. Age 18 to 65 years.
  4. Participants with typical wheals with itching and/or angioedema symptoms of chronic urticaria and either a Urticaria Activity Score 7 of at least 7 or a Urticaria Control Test score below 12.
  5. Participants willing to maintain normal healthy routines during the study, avoid alcohol, and avoid foods likely to trigger allergic reactions.

Exclusion Criteria:

  1. Severe internal organ disease, including heart disease, kidney disease, or other serious disease that could affect product metabolism.
  2. Known allergy or intolerance to any ingredient of the study product.
  3. Other skin disease or systemic disease that could affect urticaria manifestations.
  4. Participation in another clinical trial or use of prohibited drug treatment.
  5. Heavy smoking, alcohol abuse, or other lifestyle factors that could affect study results.
  6. Severe psychological disorder or cognitive impairment that could affect compliance.
  7. Inability to follow study dietary restrictions or requirements because of religious or personal reasons.
  8. Abnormal blood routine, liver function, kidney function, or other laboratory test results outside the normal range.
  9. Population for whom the product was contraindicated, including minors, participants planning pregnancy, pregnant or lactating participants, participants with liver or kidney disease history, and participants taking long-term medication.
  10. Any other factor judged by the investigator to make participation inappropriate.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: NatureU Histra Disslove
Participants received NatureU Histra Disslove, one tablet orally once daily 20 minutes before a main meal for 28 consecutive days.
Dietary supplement: NatureU Histra Disslove
NatureU Histra Disslove is a food product containing active diamine oxidase (DAO). Participants took one tablet orally once daily, 20 minutes before a main meal, preferably dinner, for 28 consecutive days.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change From Baseline in Urticaria Control Test Score
Time Frame: Baseline, Day 14, and Day 28
The Urticaria Control Test (UCT) was used to assess urticaria control. UCT ranges from 0 to 16, with higher scores indicating better urticaria control. The primary endpoint was within-participant change from baseline after 28 days of product intake.
Baseline, Day 14, and Day 28

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change From Baseline in Urticaria Activity Score 7
Time Frame: Baseline, Day 14, and Day 28
Urticaria Activity Score 7 (UAS7) was calculated from daily wheal and itch scores over 7 consecutive days. The total score ranges from 0 to 42, with lower scores indicating lower urticaria activity. The secondary endpoint was within-participant change from baseline after 28 days of product intake.
Baseline, Day 14, and Day 28
Change From Baseline in Dermatology Life Quality Index
Time Frame: Baseline, Day 14, and Day 28
The Dermatology Life Quality Index (DLQI) was used to assess skin-disease-related quality of life. The total score ranges from 0 to 30, with higher scores indicating worse quality of life. The secondary endpoint was within-participant change from baseline after 28 days of product intake.
Baseline, Day 14, and Day 28

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
OmniSolutions Laboratory Holdings Limited

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 4, 2024

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 1, 2024

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
November 1, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 15, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 20, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 28, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 28, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 20, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • SP-CTI-DX006
  • 2024080001 (Other Identifier: Ethics Committee of Dao County People's Hospital)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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