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47 active trials for Diet Modification

Utilizing Protein During Weight Loss to Impact Physical Function and Bone

This study is an ancillary study to the UPLIFT trial (NCT03074643) to evaluate the effects of diet composition (i.e., amount of protein and carbohydrate) during a 6-month weight loss intervention and 12-months of follow-up on bone phenotypes in obese older adults. Participants will receive either a protein or carbohydrate supplement along with a behavioral weight loss intervention.

Start: May 2017

Women's Responses to Adjusted Product Placement and Its Effects on Diet - 2

This study is the largest supermarket trial internationally and will assess the effectiveness and cost-effectiveness of improving the placement of fresh fruit and vegetables in discount supermarkets in improving the fresh fruit and vegetable purchasing of women aged 18-45 years.

Start: May 2018

Dietary Carbohydrate Manipulation and Energy Balance: RCT

This study will investigate how dietary sugar and carbohydrates influence metabolism and health across a 12-week period, with a focus on physical activity. One third of participants will eat a diet with typical amounts of sugar and carbohydrate, one third of participants will eat a diet with sugar intake restricted, and the final third of participants will eat a diet where both sugar and total carbohydrates are restricted and replaced with fat.

Start: October 2018

Therapeutic Nutrition With Technology in Primary Care

Low-carbohydrate diets (less than approximately 130 grams per day) are emerging as an efficacious treatment option with several studies supporting weight loss and remission of type 2 diabetes. Many physicians are now implementing this strategy but the time it takes to educate patients on nutrition is a barrier. The research team is working with physicians to develop a solution whereby the nutrition education and intervention is delivered via mobile/online technology (i.e., an app). This study will test whether it is feasible and efficacious for physicians to recommend this app to their patients with obesity and type 2 diabetes to help them lose weight and improve their condition.

Start: September 2020

WIC-Based Intervention to Promote Healthy Eating Among Low-Income Mothers

Whole grains, non-starchy vegetables, fruit, and beans are a consistent feature of diets associated with a lower risk of cancer and other diet-related diseases. For cancer risk reduction, the American Cancer Society recommendation is to consume at least 2.5 cups of a variety of fruits and vegetables (FV) daily. Other than dietary choices, weight control and physical activity levels are important modifiable determinants of cancer risk. The proposed research will finalize a novel, theory-driven intervention developed in preliminary work to promote access to fresh, unprepared, locally grown FV and build knowledge and skills to increase purchases and consumption of these foods among low-income adults served by the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC). In New Jersey (the location of the study), WIC provides participants up to $30 in seasonal Farmers' Market Nutrition Program (FMNP) vouchers and monthly cash value vouchers or CVV (valued at $11 for adults and $8 for children) redeemable at farmers' markets. The intervention will be finalized based on lessons learned in preliminary work. The program combines behaviorally-focused nutrition education with the establishment of a WIC-based farmers' market (to be implemented in 2019 during the FMNP voucher issuance period [June 19 to August 19]). Content to address other modifiable determinants of cancer risk will be added. To create additional opportunities for experiential and hands-on learning, monthly trips to an area farmers' market also are planned (between September 1, 2019 [after the WIC-based market is discontinued] and November 30, 2019 [the end of the local growing season]). The research will employ an experimental design to initially test the intervention in a sample of 244 adults. Program effects on objective biomarkers of FV intake, FMNP voucher redemption, and the redemption of CVV at farmers' markets will be examined 3 and 6 months after intervention. Mediation of intervention effects by targeted secondary outcomes, participant satisfaction with the program, and the cost-effectiveness of the intervention also will be examined.

Start: June 2019

School Lunch Salad Bars and Fruit and Vegetable Consumption

The investigators propose an efficacy study (i.e., do salad bars work under controlled conditions in naturalistic settings) to test whether introducing salad bars in elementary, middle, and high schools that have never had salad bars affects students' FV consumption and waste during lunch. A cluster randomized controlled trial will test new salad bars against controls for 6 wks, with/without an additional 4-wk marketing phase .

Start: October 2017

Saliva Insulin Responses to a Standardized Meal Tolerance Test in Humans

Recent evidence suggests that hyperinsulinemia (i.e., elevated insulin levels) is the primary causative factor in obesity. Insulin promotes fat storage and prevents fat breakdown, suggesting that weight loss would be optimized if insulin levels are managed and kept low. Understanding how different foods impact insulin levels could therefore aid in personalized weight loss (or weight maintenance) advice. It has been shown that salivary insulin can track plasma insulin following different meals and can delineate between lean and obese people. Thus, it was suggested that salivary insulin could be a potential surrogate for plasma insulin. The purpose of this study is to measure fasting saliva insulin, and salivary insulin responses to a standardized meal tolerance test in individuals with different body mass index (BMI).

Start: January 2019

Supermarket and Web-Based Intervention Targeting Nutrition (SuperWIN) for Cardiovascular Risk Reduction

The Supermarket and Web-based Intervention targeting Nutrition (SuperWIN) for cardiovascular risk reduction is a novel, randomized controlled trial aimed at increasing diet quality and decreasing cardiovascular risk. SuperWIN will deliver individualized, nutrition education at the point-of-purchase (POP), either in the aisles of the physical store or via online shopping platforms coupled with other modern software tools.

Start: March 2019

Latino Fathers Promoting Healthy Youth Behaviors

The purpose of this study is to evaluate the efficacy of Latino parent-focused education that combines enhancing parent engagement, building quality parent-child relationships, promoting healthy eating and physical activity, and engaging families with community resources for healthy foods on youth energy balance related behaviors and weight status.

Start: March 2016

KIDFIT: Keeping Ideal Cardiovascular Health Family Intervention Trial

Adverse influences starting in utero may predestine an individual's long- term risk for developing cardiometabolic diseases. The Keeping Ideal CVH (cardiovascular health) Family Intervention Trial (KIDFIT) will test whether preschool-age children, born to overweight/obese (OW/OB (mothers who did or did not experience a diet and lifestyle intervention to reduce GWG: 1) demonstrate more favorable adiposity (body fat %), body mass index percentiles (BMI%), diet quality (DASH diet score), physical activity, and other CVH metrics at baseline according to antenatal intervention status; and 2) respond to an early childhood intervention targeting diet and lifestyle behaviors with improvement in these same adiposity and CVH metrics. We hypothesize children randomized to the KIDFIT diet and lifestyle intervention group at age 3-5 years, regardless of initial maternal antenatal group assignment, will demonstrate more favorable adiposity changes assessed by anthropometry (body fat %/sum of skinfolds) and a lower cumulative incidence of obesity after the 12-month intervention, as compared with the control group. Additionally, after 12 months of the KIDFIT Intervention, children will have more favorable blood pressure and blood lipids, better diet quality (as measured by the DASH-style diet score), increased physical activity levels, and more optimal sleep duration, without adverse effects on height, compared to the control group

Start: June 2018

Building an Evidence Base for Weight Loss Strategies Among Those With Chronic SCI-The GLB-SCI+

This study's overarching aim is to follow a systematic approach that incorporates community-based participatory research (CBPR) to develop a multi-component weight loss intervention that may yield significant effects for a chronic SCI sample. The approach is to obtain data on the 3 unique strategies (prepackaged/portion-controlled meals; enhanced self-monitoring; the GLB-SCI) to inform design of an empirically supported and consumer-validated multicomponent intervention program, that combines the best of the 3 approaches into one unique intervention, the GLB SCI+. Based on the investigators' prior experience with adapting and delivering the GLB AIM (a lifestyle intervention previously adapted for those with impaired mobility), interim findings, existing literature, and consumer feedback, they hypothesize that these 3 unique strategies may confer individualized benefits to people with SCI given their complex disability-related barriers to weight loss.

Start: June 2019

Metabolic Impact of Time Restricted Feeding

The investigators are interested in how time-restricted feeding will impact weight, sleep duration and efficacy, and activity levels in obese adults. Significant advances in digital mobile technology allow detailed measures of an individual's habits, permitting the opportunity for personalized dietary and lifestyle recommendations. This is especially relevant as time-restricted feeding appears to promote weight loss independent of calorie intake, potentially shifting the paradigm of dietary recommendations from a calorie-based to a time-based perspective.

Start: September 2017

Effects of Replacing Starchy Vegetables and Refined Grains With Beef on Cardio-metabolic Disease Risk Factors (S53)

The purpose of this study is to assess the effects of replacing starchy vegetables and refined grains with beef in a vegetarian diet on cardio-metabolic disease risk factors in adults in a cross-over, randomized controlled feeding trial.

Start: June 2019

Effect of FODMAP Restriction on Persistent GI-symptoms in Coeliac Patients

The first aim of the study is to investigate the prevalence of persistent gastrointestinal symptoms and compliance with gluten-free diet and the intake of FODMAP in adult celiac patients. A web-based survey wil be performed and thereafter a randomized controlled trial to test the effect of a FODMAP reduction in patients with celiac disease with irritable bowel-like symptoms.

Start: October 2018

Exercise & Diet Effects on CV Risk in Firefighters

The study will explore the capacity for a lifestyle modification in firefighters to improve blood pressure, blood vessel stiffness, inflammation, and reduce oxidative stress. The study will be a pre- post-testing controlled trial with three groups. The intervention will be a weekly circuit workout program and a Mediterranean (high fruit/vegetable) diet. The groups will be firefighters with >10yrs experience, firefighters with <10yrs experience, and control Non-firefighters.

Start: November 2018

Chinese Healthy Heart Diet for People With High Cardiovascular Risk in China (DECIDE-Diet)

The DECIDE - Diet (Diet, ExerCIse and carDiovascular hEalth - Chinese Healthy Heart Diet for People With High Cardiovascular Risk in China) is to evaluate the effects of CHH-diet in reducing blood pressure in Chinese people with high cardiovascular risk. The study will recruit 360 adults people from 4 centers in China. All eligible participants will participate in a 1-week run-in phase in which they are fed the traditional Chinses diet. Participants who pass the run-in phase will be randomly assigned 1:1 to receive CHH-diet or traditional diet with the use of a central concealed randomization procedure (simple randomization), stratified by center and batch. The intervention will last 28 days. Primary outcome will be the change in systolic blood pressure. The secondary outcomes include the differences between the two groups in the changes of diastolic blood pressure, total cholesterol, fasting blood glucose, 10-year CVD risk and food preference score.

Start: March 2019

Effects of Home Gluten Immunogenic Peptide Testing on Children With Celiac Disease

This study aims to investigate how knowledge of gluten immunogenic peptide (GIP) levels in stool and urine affects subsequent adherence to a gluten-free diet. Half of the participants will receive results in real-time using a home device and the other half will store samples to be tested at the end of the 30 week study. Participants will also have a diet review with a dietitian at the beginning of the end of their study and be asked questions about their symptoms, gluten-free diet adherence and quality of life.

Start: April 2018

Diet for the Maintenance of Weight Loss and Metabolic Health in Obese Postmenopausal Women

The aim of the study will be comparing the effectiveness of two diets: moderate in fat with a high proportion of monounsaturated fatty acids (MUFAs) - the Mediterranean diet (MED) and 2) the low in fat and high in dietary fiber contents the dietary approaches to stop hypertension diet (DASH) on weight maintenance and cardiovascular risks following a recent body weight reduction in centrally obese postmenopausal women. The tested diets will be given ad libitum manner. Moreover, adherence to both prescribed weight-loss maintenance diets will be also evaluated by the plasma concentration of alkylresorcinols (AR) as a possible whole grain wheat/rye dietary biomarker and by the analysis of fatty acids profile in erythrocyte membranes as a dietary biomarker of a fatty acids consumption. The participants of this study will be 150 non-smoking, postmenopausal women with central obesity, who wished to lose weight and have at least one other criterion of metabolic syndrome. The intervention will include 3 phases: Phase I (weeks 1-8), weight loss dietary intervention with 700 kcal/d energy deficit, Phase II (week 9-32), weight loss maintenance intervention for those participants losing ?10% initial body weight the MED or the DASH diet will be offered in a random manner. The control group will receive oral dietary recommendations based on the Harvard model "Healthy Eating Plate". After this 32 weeks period will be finished, the participants will be discharged to the community with no contact by study personnel, until the 52-weeks follow-up period (Phase III).

Start: February 2020

Effects of Short-term Diet on HDL Composition and Function

The primary objective of this study is to generate preliminary data on the effects of a short-term diet of either fast food or Mediterranean type diet on HDL and microbiota composition and function in healthy subjects, which includes both normal weight and overweight/obese subjects.

Start: March 2016

Specific Carbohydrate Diet for Clostridium Difficile

The investigators are doing this research study to answer questions about a nutritional therapy called the Specific Carbohydrate Diet (SCD) for children with active Clostridium Difficile Infection. For this study, the investigators will be looking to determine: Is SCD effective for the treatment for Clostridium Difficile Colonization? Is the SCD well tolerated?

Start: June 2016