Clinical trial NCT02012283: Influence of Spices on Mixed Vegetable Intake Including Brassica Vegetables
Official title: Influence of Spices on Mixed Vegetable Intake Including Brassica
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Overcoming Resistance to Eating Cruciferous Vegetables
Keywords: spices and vegetables
Lead sponsor: University of California, Los Angeles
Sponsor class: OTHER
First posted: 2013-12-16
Enrollment: 20
Sex: ALL
Minimum age (years): 30
Maximum age (years): 60
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: OTHER

Brief summary: This study is being done to determine that carefully designed spice mixtures can override any taste aversion to brassica vegetables, increase consumption of vegetable dishes which include brassica vegetables.

Detailed description: This study is to determine the liking of vegetables, intentions to consume vegetables and differences in responses in consumption of three individual vegetables including: broccoli florets, cauliflower florets, baby spinach with and without spices added by measuring: (1) the actual intake of blanched dishes of vegetables using a modified Universal Eating Monitor when dishes are eaten plain or with added spices in random order; and (2) level of eating by baseline eating restraint using the Three Factor Eating Questionnaire (TFEQ).

This study will be conducted in healthy overweight subjects (30-60 years, Body Mass Index \>25 and \<30). A total of 20 subjects will be recruited (10 men and 10 women). Subjects will be further stratified by whether their level of restrained eating (10 high and 10 low restraint in each group). All participants will complete a general recruitment questionnaire which incorporates the TFEQ (Stunkard \& Messick, 1985, Cappelleri 2009) along with measures of food and drink preferences and allergies. To ensure large differences in restraint between groups, subjects will be pre-selected depending on their score on the TFEQ cognitive restraint scale, with scores greater than two defined as high restraint (HR), and two or less than two as low restraint (LR). An equal number of high restraint and low restraint eaters will be tested.

Three different vegetables with or without spices given a total of 6 dishes will be tested in 6 visits per subject. The order in which each participant will be presented with the spiced or plain vegetables is randomized. Participants will be presented with a tray containing one of the three different vegetables served as a buffet in containers. As each subject ingests the dish with or without spices the rate of eating and amount eaten will be measured using a computer-based system modified from the Universal Eating Monitor.

Broccoli will be seasoned with pre-prepared spice mix containing garlic powder (0.7g), onion powder (0.7g), black pepper (0.25g) and basil leaves (0.12g); cauliflower (300g) with garlic (0.1g), dill weed (0.12g), onion (0.05g) and black pepper (0.05g); and spinach (300g) with dried chervil (0.07g), dried chives (0.13g), garlic (0.4g) and onion (0.4g).

Eligibility criteria: Inclusion Criteria:

1. Age 30-60 years of age at screen.
2. BMI \>25 and \<30
3. In good health
4. Eat \<3 serving of vegetable per day.

c. Subjects must read and sign the Institutional Review Board-approved written informed consent prior to the initiation of any study specific procedures or enrollment. A subject will be excluded for any condition that might compromise the ability to give truly informed consent.

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Exclusion Criteria:

1. Any history of gastrointestinal disease except for appendectomy
2. Any subject with a history of diabetes mellitus, or other serious medical condition, such as chronic hepatic or renal disease, bleeding disorder, congestive heart disease, chronic diarrhea disorders, myocardial infarction, coronary artery bypass graft, angioplasty within 6 months prior to screening, current diagnosis of uncontrolled hypertension (defined as systolic BP\>160mmHg, diastolic BP\>95mmHg), active or chronic gastrointestinal disorders, bulimia, anorexia, or endocrine diseases (except thyroid disease requiring medication) as indicated by medical history or routine physical examination.
3. Any subject allergic to spice or vegetables
4. Any subject who currently uses tobacco products.
5. Any subject who participates in vigorous physical activity on a regular basis.
6. Any subject who is unable or unwilling to comply with the study protocol.

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Primary outcomes:
measure: Differences Between Plain and Spiced Vegetables Intake
timeFrame: 1 day
Secondary outcomes:
measure: Difference in Broccoli Intake With or Without Spice Among Higher Restraint Eaters and Low Restraint Eaters
timeFrame: 1 day
Other outcomes:
Locations:
Study officials:
References:
citation: Li, Z. , Krak, M. , Zerlin, A. , Brahe, L. , Rheinwald-Jones, A. , Thames, G. , Zhang, Y. , Tseng, C. and Heber, D. (2015) The Impact of Spices on Vegetable Consumption: A Pilot Study. Food and Nutrition Sciences, 6, 437-444.