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.

Inclusion Criteria:

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

Exclusion Criteria:

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.