Taste Changes With Bariatric Surgery

Taste, Altered Clinical Trial

Official title:

Taste Changes With Bariatric Surgery

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03548038
• Other study ID #: 2011543
• Status: Completed
• Start date: May 24, 2018
• Est. completion date: May 4, 2020

Study information

• Verified date: March 2020
• Source: University of Missouri-Columbia
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

It is commonly believed that a link exists between BMI and taste perception. One group of researchers observed that women who are obese experience reduced taste sensitivity when compared to normal-weight controls. Others have compared taste sensitivity between lean and obese subjects and found no significant differences. The inconsistencies in these studies demonstrate how much variation in taste sensitivity is possible when different factors are applied in research. Throughout several studies, one element remains constant - bariatric surgery causes appetite aversions. These changes in appetite and food preference likely have a large influence on the overall magnitude of post-surgical weight loss. Although many studies have investigated the changes in taste preference after bariatric surgery, few, if any, have focused on changes in sweet taste perception.

Description:

The overall goal of the present project is to determine how future bariatric surgery will affect the taste for sweet liquids. Taste perception will be assessed before surgery (pre-operative, pre-op) and after bariatric surgery, at approximately 1 month. Taste studies will be conducted with solutions prepared freshly before each test using sucrose dissolved in distilled water. Six concentrations of sucrose (table sugar) will be tasted in random order, with the most concentrated solution being roughly the sweetness of soda. The subject is blinded to the concentrations. It is hypothesized that there will be no significant difference in taste perception when pre-op and post-op values are compared. However, the investigators hypothesize that taste preference will identify solutions with lower concentrations post-op.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 21
• Est. completion date: May 4, 2020
• Est. primary completion date: December 20, 2019
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 21 Years to 70 Years

Eligibility

Inclusion Criteria:

• Women who plan to undergo bariatric surgery.
• Age: 21-70y.
• Non-smokers (at least 3 months post smoking cessation).
• Non-diabetic or prediabetic

Exclusion Criteria:

• Subject on a medication known to affect taste perception: Antibiotics, thyroid medications, psychotropic, neurological, and cardiac medications.
• Inability to understand the test instructions.
• Subject has already undergone bariatric surgery

Related Conditions & MeSH terms

• Dysgeusia
• Taste, Altered

Intervention

Other:
• taste test
All subjects will complete a procedure to determine their taste sensitivity to sweet tastants.

Locations

Country	Name	City	State
United States	Elizabeth Parks	Columbia	Missouri
United States	University of Missouri	Columbia	Missouri

Sponsors (1)

Lead Sponsor	Collaborator
University of Missouri-Columbia

Country where clinical trial is conducted

United States, 

References & Publications (3)

Bueter M, Miras AD, Chichger H, Fenske W, Ghatei MA, Bloom SR, Unwin RJ, Lutz TA, Spector AC, le Roux CW. Alterations of sucrose preference after Roux-en-Y gastric bypass. Physiol Behav. 2011 Oct 24;104(5):709-21. doi: 10.1016/j.physbeh.2011.07.025. Epub 2011 Jul 30. — View Citation

Pepino MY, Finkbeiner S, Beauchamp GK, Mennella JA. Obese women have lower monosodium glutamate taste sensitivity and prefer higher concentrations than do normal-weight women. Obesity (Silver Spring). 2010 May;18(5):959-65. doi: 10.1038/oby.2009.493. Epub 2010 Jan 14. — View Citation

Scruggs DM, Buffington C, Cowan GS Jr. Taste Acuity of the Morbidly Obese before and after Gastric Bypass Surgery. Obes Surg. 1994 Feb;4(1):24-28. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Taste Perception on an Interval Scale	Taste perception will be assessed by the subjects' responses to varying sucrose solutions. The interval scale begins with "barely detectable" at zero and goes up to "strongest imaginable" at 10. Subjects will be asked to draw an "X" at the location on the graph corresponding to their perception.	Change from baseline to one month after bariatric surgery