20 Clinical Trials for Various Conditions
This is a randomized trial to to test the degree to which visual attention to unhealthy foods, racially congruent people, and/or "likes" in social media ads explains the relationship between ad exposure and calorie intake.
Background: Diet-induced thermogenesis (DIT) is the amount of energy one s body uses to eat food, absorb the nutrients from the food, and process those nutrients. Researchers would like to understand more about how changing the balances of protein, fat, carbohydrates, and total calories in the diet can affect DIT. Objective: To learn how different diets can change a person s DIT. Eligibility: Healthy people aged 18 to 60 years who have not intentionally lost weight in the past 6 months. Design: Participants will stay in a clinic for about 35 days. They will eat only the food provided. They will receive 8 different diets during the study, including 7 test diets. Participants will undergo multiple tests. They will be screened with blood and urine tests and a test of their heart function. During the first few days: Their waist, thigh, and neck circumference will be measured. They will have a DXA scan: They will lie on a padded table for about 20 minutes while an instrument measures the amount of fat in their body. They will be tested for diabetes. They will answer questionnaires about topics including eating behavior, hunger, and stress. Throughout the study: Their weight will be measured daily. Blood tests will be repeated. They will stay in a metabolic chamber a total of 9 times. They will remain in a closed room for 24 hours while researchers monitor the room temperature and levels of oxygen and carbon dioxide. Participants will collect all their urine for each 24-hour period. ...
The goal of this study is to observe the impact of caloric intake on ovarian reserve as measured by anti-müllerian hormone (AMH) levels and antral follicles (AFC) visualized on ultrasound. It has been shown that obesity negatively impacts these markers, but research is lacking regarding the influence of nutrition and caloric intake on fertility. This would give the investigators information on how diet may impact ovarian reserve in patients seeking fertility treatment.
Objective: To show that a 1-2 day reduction of caloric intake can reduce the insulin resistance produced by several days of overnutrition. Approach: Healthy volunteers will be admitted to the Clinical Research Center and undergo a baseline euglycemic-hyperinsulinemic clamp study to assess their insulin resistance. Subjects will then start on an overnutrition program for 4 days consisting of 3 meals and 3 snacks containing \~6,000 Kcal/24hours. A second clamp study will be performed on day 5 to demonstrate the overnutrition induced increase in insulin resistance. Starting on day 5 the subject's caloric intake will be reduced to \~1,000 Kcal for 2 days (day 5 and 6). After that on the morning of day 7, a third hyperinsulinemic-euglycemic clamp will be performed to determine whether the reduced caloric intake did reduce insulin resistance and the volunteer will be discharged from the Clinical Research Center.
This study will investigate the effects of acute morphine administration on taste acuity and how much a person eats. It is hypothesized that there will be a dose dependent decrease in taste acuity and dose dependent increase in food intake associated with acute morphine administration. Knowledge from this study will impact the future of feeding behavior and obesity research in the general population. Results will also promote exploration of the long-term effect of opioid abuse on taste acuity and feeding behavior in substance abusing populations.
The purpose of this research study is to evaluate how easy it is for female HIV- positive subjects taking Complera to comply with the dietary requirement using a food diary in the short term (4 weeks) and long term (24 weeks and 48 weeks) and to determine association between calorie intake and virologic suppression. A secondary goal of the study is to evaluate subjects' attitudes towards contraception.
Exciting advances have led to the concept that hormones can modulate appetite and food intake. Oxytocin is a peptide hormone that is released in regions throughout the brain, including areas involved in food motivation. Animal studies suggest that oxytocin may reduce food intake. The effects of oxytocin administration on eating behavior in humans, which could have important implications in eating-related disorders ranging from obesity to anorexia nervosa, have not been investigated. This double-blind placebo-controlled cross-over study of single-dose oxytocin administration investigates whether: 1. Caloric intake will decrease following administration of oxytocin versus placebo 2. Appetite will decrease following administration of oxytocin versus placebo 3. Resting energy expenditure will increase following administration of oxytocin versus placebo
This study is a test of possible mechanisms by which calorie labels might lead people to increase calorie intake. The investigators hypothesize that calorie labels might increase calorie intake because 1) people infer that higher calorie foods are tastier, 2) calorie labels invoke thoughts of dieting, leading people to overconsume as a reaction, 3) people try to maximize calories consumed per dollar spent, and 4) calorie labels change one's goal motivation toward food, causing people to eat more.
The primary purpose of this study is to test different methods of measuring energy balance, including food intake and energy expenditure. Another primary purpose of this study is to see if energy expenditure predicts weight and change after a weight loss diet. A secondary aim will be to test the reliability and validity of the Actical accelerometer, SenseWear Armbands, and the Intelligent Device for Energy Expenditure and Activity (IDEAA) monitors at measuring activity energy expenditure (AEE) and total daily energy expenditure (TEE) against the gold standard, doubly-labeled water (DLW). Similarly, we will test whether the estimated energy expenditure or posture allocation from the 3 devices is associated with weight change during and following a low calorie diet (LCD).
The purpose of this study is to determine the extent to which manipulation of dietary variety and course sequence affects fruit intake and overall energy intake in preschool-aged children.
The purpose of this randomized controlled study using a crossover design is to investigate the main effect of portion size and food type (low-energy dense vs. high-energy dense) on caloric intake.
Participants will be matched with either their friend or an unfamiliar peer who is the same gender and about the same age. Participants will have 45 minutes of free-play in an experimental room where they will have free access to energy-dense and nutrient-dense foods and an assortment of games and puzzles. The investigators predict that participants eating with a friend will eat significantly more than participants eating with an unfamiliar peer. The investigators also predict that overweight participants eating with an overweight partner will eat significantly more than participants eating with a non overweight participant.
This study examines the effects of increasing the cost of social interactions and food on overweight and non-overweight youth. Using a computerized operant task youth will earn points exchangeable for food and social activity. The investigators predict that both overweight and non-overweight children will substitute food for interactions with an unfamiliar peer when this alternative is made expensive. Also, the investigators predict that both overweight and lean participants will defend their choice to spend time with a friend even when this alternative is made expensive.
One possible reason that weight gain after transplant may interfere with new kidney function is due to the enlargement of a kidney structure called the glomerulus. The researchers believe that modest caloric intake reduction (CIR) early after kidney transplantation can reduce the enlargement (hypertrophy) of the glomerulus associated with kidney transplantation and may improve long term allograft survival, by reducing glomerular hypertrophy mediated progressive glomerulosclerosis.
Today's environment provides many hedonic stimuli that promote consumption of unhealthy energy-dense snack foods. It is widely recognized that a systems approach is required to deal with this complex problem. However, individuals, particularly children, also need to develop the personal capacity to deal with tempting stimuli and inhibit responses to these energy-dense foods. Therefore in this proposal, we will focus on enhancing higher level executive functions, particularly inhibitory control, which is needed to counterbalance impulsive behavior and is crucial for growth and development. We have chosen to focus on developing inhibitory control in preschool-age children because executive functioning/inhibitory control and eating habits are developing at this time. Among preschool-age children, inhibitory control is fostered through social play-based curriculums and has been found to be related to greater school readiness and academic skills. Therefore, the goal of this proposal is to adapt a play-based curriculum, the Tools of the Mind program, to promote greater inhibitory control skills in preschool children and decrease consumption of energy-dense snack foods. In Phase I, we will develop and pilot a Child Inhibitory Control Play-based Program (CHIC Play) among children age 4- to 6-years old. We will adapt the learning tools used in the Tools of the Mind curriculum and employ naturalistic play scenarios, drawings (visual support), and games to teach children to inhibit their responses to energy-dense snack foods. Once developed, we will test the efficacy of CHIC Play in the preschool setting. Parent groups will also be conducted to support the adoption of these skills at home. The primary outcome of interest is caloric intake and age- and gender-adjusted percent of daily caloric intake as measured by the Eating in the Absence of Hunger (EAH) free access procedure and a snack time procedure. Inhibitory control skills will also be measured using executive functioning tasks. Feasibility and acceptability of this program will be determined from parent, child, and teacher surveys. The purpose of this study is to develop a new innovative method of decreasing energy-dense snack food consumption by promoting the development of inhibitory control or impulse control. If successful, this program has the potential to play a role in the treatment and prevention of childhood obesity.
The purpose of this study is to determine how exercise and nutritional guidance and supplementation affects your physical fitness, risk for heart disease, your body's ability to burn fat, and your opinions about your health.
The purpose of this pilot before and after interventional study is to determine if early intervention and provision of menus regarding appropriate diet choices for melphalan autologous transplant patients experiencing nausea and diarrhea will improve nutrition status and overall calorie and protein intake throughout the transplant process.
The purpose of this study is to determine if an increased protein intake can attenuate the suppression of metabolic and anabolic hormones during caloric restriction
This study will test the hypothesis that reducing the energy density of the diet by incorporating more water-rich foods will result in: 1) greater weight loss and weight maintenance; 2) greater diet satisfaction and satiety; and 3) more healthful dietary patterns than reducing dietary fat alone.
This study is one of three CALERIE trials that test the hypothesis that a reduced calorie, nutritionally sound diet increases the length of life and prevents some age-related chronic diseases such as cancer, diabetes, and cardiovascular disease. The three sites that are participating in the CALERIE trial represent a diversity of subject populations and interventional strategies.