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Free Fatty Acids: Threshold Repeatability Study

This study has been completed.
Information provided by (Responsible Party):
Richard Mattes, Purdue University Identifier:
First received: March 7, 2012
Last updated: November 21, 2013
Last verified: March 2013
This study seeks to determine if non-esterified fatty acid (NEFA) taste detection thresholds change with repeated testing. Threshold testing for NEFA taste has been reported by a number of laboratories, including our own; however, these studies have reported data for only one testing occasion. The investigators seek to conduct repeated testing to measure the test-retest reliability of these methods. The investigators believe that with repeated exposure to NEFA, a person's sensitivity increases. The investigators are also testing the efficiency of testing by two methods (forced-choice ascending trial versus staircase). Additionally, the association between taste responses, diet and BMI will be explored.

Taste, Non-esterified Fatty Acids

Study Type: Observational
Study Design: Observational Model: Case-Crossover
Time Perspective: Prospective
Official Title: Free Fatty Acids: Threshold Repeatability Study

Further study details as provided by Richard Mattes, Purdue University:

Primary Outcome Measures:
  • Non-esterified fatty acid detection thresholds in humans [ Time Frame: 6 months ]
  • BMI [ Time Frame: Baseline ]

Secondary Outcome Measures:
  • Habitual fat intake [ Time Frame: Baseline ]
    Block Rapid Dietary Fat Screener will be used as well as the ASA-24.

  • testing method [ Time Frame: 6 months ]
    Comparison of time to maximum sensitivity by participants based on forced-choice versus staircase stimulus presentation techniques.

  • hunger [ Time Frame: each visit ]
    Visual analog scale

Estimated Enrollment: 48
Study Start Date: March 2012
Study Completion Date: November 2013
Primary Completion Date: November 2013 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Participants between the ages of 18 and 55 years of age from any ethnic background who are in good health and are available for the next three months will be recruited. Additionally, equal numbers of lean and overweight participants will be sought.

Inclusion Criteria:

  • 18-55 years old
  • in good health
  • available for three months

Exclusion Criteria:

  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01550120

United States, Indiana
Purdue University
West Lafayette, Indiana, United States, 47907
Sponsors and Collaborators
Purdue University
Principal Investigator: Richard D Mattes, PhD Purdue University
  More Information

Responsible Party: Richard Mattes, Distinguished Professor, Purdue University Identifier: NCT01550120     History of Changes
Other Study ID Numbers: 055-027
Study First Received: March 7, 2012
Last Updated: November 21, 2013

Keywords provided by Richard Mattes, Purdue University:
human processed this record on September 18, 2017