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Influence of Instaflex Advanced Supplement on Joint Function

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03041077
Recruitment Status : Completed
First Posted : February 2, 2017
Last Update Posted : January 23, 2018
Direct Digital
Information provided by (Responsible Party):
Appalachian State University

Brief Summary:
Joint discomfort is reported by 32% of U.S. adults, and increases with age. The knee is the most common site of joint discomfort regardless of age. Nearly half of people with knee joint discomfort use natural supplements to alleviate symptoms, but more research is needed to determine their effectiveness. In a previous study, we measured the effect of 8-weeks ingestion of a commercialized joint support dietary supplement (InstaflexTM Joint Support, Direct Digital, Charlotte, NC) compared to placebo on joint discomfort, stiffness, and function in adults with self-reported joint discomfort. This study will be repeated using Instaflex Advanced, with a longer 12-week time period. The Instaflex Advanced supplement includes six products: turmeric, resveratrol, Boswellia serrata, collagen, hyaluronic acid, and black pepper extract. This unique blend may improve joint function and increase mobility, but has not yet been tested in humans using a randomized, double-blinded, placebo-controlled research design. The primary purpose of this study is to assess the effect of 12-weeks ingestion of the Instaflex Advanced supplement compared to placebo in improving knee function in adults with self-reported knee joint discomfort.

Condition or disease Intervention/treatment Phase
Knee Discomfort Dietary Supplement: Instaflex Advanced Dietary Supplement: Placebo Not Applicable

Detailed Description:

The research procedures will be conducted at the Human Performance Laboratory (Room 1201, Plants for Human Health Institute Building, 600 Laureate Way), operated by Appalachian State University at the North Carolina Research Campus (NCRC) in Kannapolis, NC. Subjects will come here for orientation/baseline testing and then 3 other lab visits (each session will take about 30 minutes). The total amount of time study participants will be asked to volunteer for this study is about 2 hours at the Human Performance Laboratory (over a 12-week period). Participants will also take a daily supplement for 12 weeks and keep compliant with this regimen.

Lab visit testing sequence:

  1. First visit:

    1. Consent form
    2. Medical health questionnaire to verify medical history, and lifestyle habits.
    3. Questionnaire for previous 4-weeks symptoms.
    4. Height, weight, and percent body fat (BIA).Testing will take place behind a screened area of the lab to maintain privacy.
    5. Questionnaires: WOMAC, visual pain scale, POMS.
    6. Receive supplement organizer tray with 4-weeks supply (and instructions).
    7. After a practice trial, study participants will walk as quickly and far as they can on a track for 6 minutes. Total distance covered in 6 minutes will be recorded.
  2. 4 weeks, 8-weeks, 12 weeks (second, third, and fourth lab visits):

    1. Symptoms log for previous 4-weeks symptomatology.
    2. Height, weight, and percent body fat.
    3. Questionnaires: WOMAC, visual pain scale, POMS.
    4. Receive supplement organizer tray with 4-weeks supply (and instructions) during second and third lab visits.
    5. 6-minute walk test


Supplements (Instaflex Advanced, placebo) will be contained in identical looking capsules and organized by day of the week in supplement organizer trays. Study participants will take 1 capsule each day in the morning. The placebo capsules contain magnesium stearate, an inert substance. The Instaflex Advanced supplement ingredients include: turmeric, resveratrol, Boswellia serrata, collagen, hyaluronic acid, and black pepper extract. Compliance will be monitored with bi-weekly email messages, and by counting unused capsules when the supplement trays every 4 weeks. Acetaminophen, as found in Tylenol, will be allowed as a rescue medicine for pain during the study as needed.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 66 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: Influence of Instaflex Advanced Supplement on Joint Function: A Randomized, Placebo-controlled Community Trial
Actual Study Start Date : February 1, 2017
Actual Primary Completion Date : June 30, 2017
Actual Study Completion Date : September 30, 2017

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Instaflex Advanced
Dietary supplement: Joint function
Dietary Supplement: Instaflex Advanced
Joint function

Placebo Comparator: Placebo
Dietary supplement: Placebo
Dietary Supplement: Placebo

Primary Outcome Measures :
  1. Change in WOMAC total score [ Time Frame: Change from baseline WOMAC total score at 4 weeks, 8 weeks, 12 weeks ]
    WOMAC questionnaire responses pre-study, 4 weeks, 8 weeks, 12 weeks

Secondary Outcome Measures :
  1. WOMAC subscales of pain, stiffness, and physical function [ Time Frame: Change from baseline WOMAC subscales at 4 weeks, 8 weeks, 12 weeks ]
    WOMAC questionnaire subscale responses pre-study, 4 weeks, 8 weeks, 12 weeks

  2. Visual Pain Scale [ Time Frame: Change from baseline visual pain scale at 4 weeks, 8 weeks, 12 weeks ]
    10-point Likert-type scale for knee pain severity

  3. Profile of Mood States (POMS) [ Time Frame: Change from baseline POMS at 4 weeks, 8 weeks, 12 weeks ]
    Assessment of mood state

  4. 6 minute Walk Test [ Time Frame: Change from baseline 6 minute walk test at 4 weeks, 8 weeks, 12 weeks ]
    Maximum distance covered during 6 minutes of walking

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   50 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Gender Based Eligibility:   Yes
Gender Eligibility Description:   Self-reported on questionnaire
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Male or female adult
  • Age 50-75 years
  • Self-reported history (>3 months) of joint discomfort in the knees. NOTE: the severity of knee discomfort will be determined through a questionnaire called the WOMAC, and should be at least 2 points (indicating mild knee discomfort or greater).
  • No history of regular use of non-steroidal anti-inflammatory drugs (NSAIDs) use (e.g., ibuprofen, aspirin) during the previous two weeks, and willingness to avoid the use of NSAIDs during the 12-week study.
  • Not on other medications (e.g., analgesic gels, arthritis medications, other anti-inflammatory drugs) or supplements (in particular, glucosamine and chondroitin) for joint discomfort during the previous two weeks, and a willingness to avoid use of these during the 12-week study.
  • No serious medical problems (current cancer case, severe rheumatoid arthritis, recent heart attack, recent stroke, congestive heart failure, ulcers, kidney disease, or other disease that would interfere with study participation).
  • No psychiatric disorder or other condition that might interfere with self-assessment ability.
  • Willingness to follow all study procedures including randomization to one of two groups, and to stay weight stable during the study.

Exclusion Criteria:

  • Inability to comply with study requirements including avoidance of NSAIDs, other anti-inflammatory medications, or discomfort supplements.
  • Current diagnosis of cardiovascular disease, cancer (except for non-melanoma skin cancer), severe rheumatoid arthritis, ulcers, kidney disease, psychiatric disorder.
  • For female subjects: Pregnant or nursing, or planning to be pregnant or nursing during the study.
  • On a weight loss program during the study.
  • Vegetarian or vegan.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03041077

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United States, North Carolina
Appalachian State University Human Performance Lab, North Carolina Research Campus
Kannapolis, North Carolina, United States, 28081
Sponsors and Collaborators
Appalachian State University
Direct Digital
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Principal Investigator: David C Nieman, DrPH Appalachian State University
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Responsible Party: Appalachian State University Identifier: NCT03041077    
Other Study ID Numbers: 17-0081
First Posted: February 2, 2017    Key Record Dates
Last Update Posted: January 23, 2018
Last Verified: January 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Plan Description: No IPD sharing plan

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No