Acute Intervention to Assess the Impact of Practical Strategies for Healthy Eating (PORTIONS-3)
Overweight and Obesity, Healthy Diet
About this trial
This is an interventional prevention trial for Overweight and Obesity focused on measuring Portion control tools, Food portion size
Eligibility Criteria
Inclusion Criteria: Adults aged between 18 and 65 years BMI between 27.5 and 39 kg/m-sq, except for Asian participants (BMI 26 to 39 kg/m-sq) Good gastrointestinal health Good visual acuity or wearing contact lenses Regular eating habits (i.e. consuming lunch and dinner at least 5 days a week) Liking of at least one of the foods from the three major categories (vegetables, protein, and starch) Willingness to provide blood samples Availability to attend two clinical visits at lunch time Exclusion Criteria: Malnutrition (including dehydration; anaemia; blood donation within less than 3 months) Gastrointestinal disorders Eating disorders (a score of 20 or more in the EAT-26) Elevated stress levels (a score of 27 or more in the PSS-14) Need to wear glasses to self-serve food Being on a diet to gain or lose weight (leading to >7.5% body weight change in the last 3 months) Food allergies or restrictions impacting food choices at the buffet meal (including veganism) Active medical conditions like diabetes, cancer, epilepsy, memory loss impacting on food behaviour and/or body weight Taking medications affecting appetite, body weight, memory or sight, except if the person has been on a stable dose for the past 3 months and no symptoms have been experienced Using a pacemaker/other electronic medical device that may interfere with the eye tracking equipment or software Smokers, drinkers, athletes and pregnant or lactating women Knowledge that can affect the results of the study (e.g., nutritionists/dietitians, those with previous training in eating behaviour research) Participation in the preceeding qualitative study. Menstrual cycle in women will not be controlled for but day of last menstruation in pre-menopausal women will be recorded. Post-menopausal women will not be excluded; however, this detail will be noted at screening, with an individual's menopausal status (pre, peri or post). Candidates working shifts may be eligible if they are able to attend a clinical visit at least 12 hours since the last shift, to ensure they have sufficient sleep and their appetite sensations are not altered.
Sites / Locations
- University of Navarra, Dept. of Food Science and Physiology, Center for Nutrition Research
Arms of the Study
Arm 1
Arm 2
Active Comparator
Experimental
Standard serving utensil toolkit
Optimised portion-control toolkit
Participants will self-serve and condiment a cold meal in the laboratory using standard kitchen utensils, including 2 nylon serving spoons and a simple glass oil dispenser. Participants will complete an eye-tracking test before eating, and will fill in questionnaires and provide blood samples during and after the meal. At 2h post-meal, they will complete a computerized memory reconstruction task related to the meal. After leaving the laboratory participants will keep a food diary, and will complete an on-line learning test before bedtime.
Participants will self-serve and condiment a cold meal in the laboratory using an optimised portion control toolkit. This toolkit will include two calibrated serving spoons, one for vegetables (slotted) and one for starch (solid), and a calibrated oil dispenser. Both spoons have a volume capacity of 155 ml with a 121 ml mark. The oil dispenser has a volume capacity of 250ml and allows pre-portioning of the oil via a sucking device in amounts ranging from 5-20 millilitres, 1-3 teaspoons or 0.5 to 1 tablespoon, prior to serving. Participants will complete an eye-tracking test before eating, and will fill in questionnaires and provide blood samples during and after the meal. At 2h post-meal, they will complete a computerized memory reconstruction task related to the meal. After leaving the laboratory participants will keep a food diary, and will complete an on-line learning test before bedtime.