View clinical trials related to Food Preferences.
Filter by:In the USA, about 10% of grown-ups have a hard time finding healthy food, like fruits and vegetables. It's even harder for older grown-ups who might be sick and find it tricky to move around, which makes it tough to get healthy food. The investigators are trying to fix this by testing two new ways to help older people (aged 65 and up) get nutritious food. The investigators are getting lots of help and ideas from older adults to make these ways work the best they can. The study is happening at the Erie County Medical Center (ECMC) in the East Side of Buffalo, NY, where many African Americans live. This place hasn't been treated fairly, so there aren't many places to buy fresh fruits and vegetables in the local stores. On the ECMC campus, there are three clinics that can help people who can't easily get healthy food. Every participant in our study will be put into one of three programs, each lasting 12 weeks, and they will get food every week. In the "usual care" program, a doctor writes an order, and the participant gets a voucher to buy more fruits and vegetables at a market or store. In the "delivery of a produce prescription box" program, a box of fruits and vegetables is brought to the participant's home. The participant can pick what they like online or by calling a helper. If they don't pick, they get a regular box. In the "delivery of a meal kit box" program, the participant gets the ingredients for three meals in a box. The participant can pick three meals they like online or by calling. If the participant doesn't pick, three meals will be chosen for the participant. For the second and third programs, participants will get messages to remind the participant when to choose their food, when the time to choose is almost up, and when their food is on its way. If a participant can't use messages or the internet, they can call a helper for support. The investigators believe the study will show that these ways can help older adults who have a hard time getting food to eat more fruits and vegetables. The investigators will also find out which way works best compared to the usual way in the Buffalo, NY area.
Food preferences are defined by a number of measurable parameters, such as per se food choices, sensitivity of taste and olfactory sensory perceptions, hedonic appreciation of foods ("liking") and motivation to consume them ("wanting"). These food preferences are fundamental to the quality of food intake, and are therefore a key factor influencing weight loss or maintenance of a stable weight. Obesity is also associated with reduced sensory sensitivity to taste and smell, as well as disturbances in the responses of the food reward system. However, the internal, or physiological, mechanisms impacting these food preferences are still poorly understood. To date, several studies seem to point to the role of body composition, in particular visceral adiposity, or adiposity surrounding the digestive organs. Indeed, a high level of visceral adiposity is associated with the onset of numerous cardiometabolic disorders, but also with altered sensory perceptions. This relationship could be mediated by the vagus nerve, which connects the digestive organs to the brain, enabling the perception of internal signals sent by the body, such as feelings of hunger or satiety. Low vagal activity is associated not only with abdominal obesity, but also with reduced sensory sensitivity to taste and smell, and changes in food choices in favor of energy-dense foods (rich in fats and/or sugars). Electrical stimulation of the vagus nerve is now recognized as a possible treatment for morbid obesity in the USA, but the mechanisms leading to the expected weight loss are still debated. Similarly, an increase in vagal tone has been found in patients who have undergone bariatric surgery for the treatment of severe complicated to morbid obesity, in parallel with sensory disturbances. The overall aim of this project is to explore and confirm the relationship between visceral adiposity and various food preference parameters, such as olfactory and gustatory perceptions and reward system responses, involving liking and wanting certain foods and associated behaviors. This project also aims to shed light on the possible mediation of the vagus nerve in this relationship.