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47 active trials for Diet Modification

The Impact of a Parenting Intervention on Latino Youth Health Behaviors

The purpose of this study is to test if a parenting program can be used to prevent substance use among Latino youth and at the same time promote healthy eating. Pairs of 7th grade students and one of their parents will be enrolled in the study and randomly assigned to three groups: an existing parenting intervention focusing on substance use prevention (FPNG), the enhanced parenting intervention that also has nutrition content (FPNG+), and a comparison program focused on academic success. Only parents will attend intervention sessions. Data will be collected from the parent and their 7th grade student to see how these programs impacted substance use, nutrition, and parenting. The investigators hypothesize that families receiving the FPNG+ will have improved nutrition habits than the other conditions. Students in both FPNG and FPNG+ will have lower substance use rates as compared to the academic success program. In addition, the effects of parenting strategies and sociocultural factors on the FPNG and FPNG+ results will be studied.

Start: September 2018

Community Activation for Prevention (CAPs): A Study of Community Gardening

The investigators previous studies show that community gardening is associated with reduction of key health behaviors for cancer prevention in diverse populations. Community gardeners eat more fruits and vegetables per day, are more physically active, and are more likely to avoid age-associated increase in body mass index (BMI). The effect is partially explained by the finding that gardeners are more socially involved, and feel more social support than non-gardeners. The investigators propose a randomized controlled trial to determine whether community gardening improves cancer-preventive behaviors among a multi-ethnic, low-income adult population and elucidate the pathways that shape cancer-preventive behaviors. A randomized controlled trial is needed to demonstrate that the observed behavioral differences are due to the effect of gardening as an intervention rather than self-selection by gardeners.

Start: January 2017

Fermented Food-Supplemented Diet in Ulcerative Colitis

The purpose of this study is to see how a diet that supplements fermented foods effects inflammation and quality of life in patients with mild to moderate Ulcerative Colitis (UC). There is a paucity of research and an enormous need for better understanding of diet and intestinal inflammation. Fermented food have been shown to positively influence inflammatory cytokines and intestinal microbial diversity in healthy volunteers.

Start: September 2020

The Influence of a Fasting Mimicking Diet on Ulcerative Colitis

The purpose of this study is to see how a diet that mimics fasting effects inflammation in patients with mild to moderate Ulcerative Colitis (UC). The diet may allow users to receive the benefits of fasting while also being able to enjoy food (the ingredients of which are GRAS (generally recognized as safe) by the Food and Drug Administration (FDA). Research on dietary interventions and UC are very limited. Fasting mimicking diets (FMD) have been studied with support of the National Institute of Health and published in leading journals. This research investigates whether markers of inflammation decrease and/or quality of life increases after three cycles of a five-day period of the fasting mimicking diet, and may provide rationale for its use to treat UC.

Start: December 2020

Effects of an Intermittent Reduced Calorie Diet on Crohn's Disease

The purpose of this study is to see how an Intermittent Calorie Reduced Diet (IRCD) that mimics fasting effects inflammation in patients with mild to moderate Crohn's disease (CD). The diet may allow users to receive the benefits of fasting while also being able to enjoy food (the ingredients of which are GRAS (generally recognized as safe) by the Food and Drug Administration (FDA). Research on dietary interventions and CD are very limited. Diets that mimick fasting have been studied with support of the National Institute of Health and published in leading journals. This research investigates whether markers of inflammation decrease and/or quality of life increases after five-day periods of the IRCD, and may provide rationale for its use to treat CD.

Start: December 2019

Comparing High and Normal Protein Diets for the Dietary Remission of Type 2 Diabetes

The purpose of this study is to examine the impact of high protein (HP) vs. normal protein (NP) diets on weight loss, loss of fat free mass (FFM), and remission of type 2 diabetes (T2D) in individuals with T2D. Both diet groups will receive dietary and physical activity guidance through a group-based weight loss program, State of Slim (SOS). The central hypothesis is that the HP diet (with ?4 weekly servings of lean beef) will lead to greater remission of T2D vs. a NP diet by 1) producing greater weight loss and limiting weight regain and 2) preferentially reducing fat mass while preserving FFM.

Start: July 2019

Obesity Risk in African American Women is Determined by a Diet-by-phenotype Interaction

The Scientific Premise of this study is that the high level of obesity displayed by African American (AA) women is due to the ability to secrete large amounts of insulin when sugary foods are consumed. When AA women eat a diet rich in starchy or sugary food (a "high-glycemic" diet that stimulates insulin secretion), the food that is eaten is stored as fat rather than being burned as fuel. The investigators previous research has suggested that AA women have an easier time losing weight and keeping it off when eating a low-glycemic diet. The proposed study will be the first randomized clinical trial to test the effect of high and low glycemic diets for weight loss and weight-loss-maintenance in obese AA women.

Start: March 2019

Dynamic Connectivity Under Metabolic Constraints

In this study, we investigate the impact of insulin resistance on the acceleration of brain aging, and test whether increased neuron insulin resistance can be counteracted by utilization of alternate metabolic pathways (e.g., ketones rather than glucose). This study has three Arms, which together provide synergistic data. For all three Arms, subjects are tested in a within-subjects design that consists of 2-3 testing sessions, 1-14 days apart, and counter-balanced for order. During each session we measure the impact of fuel (glucose in one session, ketones in the other) on brain metabolism and associated functioning. For Arms 1-2, our primary experimental measure is functional magnetic resonance imaging (fMRI), which we will use to trace the self-organization of functional networks following changes in energy supply and demand. Arm 1 tests the impact of endogenous ketones produced by switching to a low carbohydrate diet, while Arm 2 tests the impact of exogenous ketones consumed as a nutritional supplement. For Arm 3, we use simultaneous magnetic resonance spectroscopy/positron-emission tomography (MR/PET) to quantify the impact of exogenous ketones on production of glutamate and GABA, key neurotransmitters. Subjects will be given the option to participate in more than one of the Arms, but doing so is not expected nor required. Prior to scans, subjects will receive a clinician-administered History and Physical (H&P), which includes vital signs, an oral glucose tolerance test (OGTT), and the comprehensive metabolic blood panel. These will be used to assess diabetes, kidney disease, and electrolytes. If subjects pass screening, they will be provided the option to participate in one or more Arms, which include neuroimaging. To provide a quantitative measure of time-varying metabolic activity throughout the scan, based upon quantitative models of glucose and ketone regulation, as well as to be able to implement safety stopping rules (see below), we will obtain pin-prick blood samples three times: prior to the scan, following consumption of the glucose or ketone drink, and following completion of the scan. To assess effects of increased metabolic demand, we measure brain response to cognitive load, transitioning from resting-state to spatial reasoning through a Tetris task. To assess effects of increased metabolic supply, we measure brain response to glucose or ketone bolus.

Start: June 2015

Antimicrobial-free Production of Beef Cattle's Affect on Gut Microbiome

The primary purpose of this study is to assess whether consuming foods from animals raised with antimicrobial medications influences gut health in adults between the ages of 21-69 years old. Antimicrobial medications are commonly used to help animals avoid infections while growing.

Start: January 2021

Multicultural Healthy Diet to Reduce Cognitive Decline

This is a pilot randomized controlled clinical trial is designed to investigate whether the Multicultural Healthy Diet (MHD), an anti-Inflammatory diet tailored to a multi-cultural population, can improve cognitive functioning in a middle aged (40-65 yr) urban population in Bronx, New York compared to a usual diet.

Start: October 2018

Personalized Responses to Dietary Composition Trial 3

The PREDICT 3 study will build on previous research in over 2,000 individuals to further refine machine learning models that predict individual responses to foods, with the aim of advancing precision nutrition science and individualized dietary advice. The study incorporates both standardized and controlled dietary intervention, for the purpose of testing postprandial responses to specific mixed meals, in addition to a free-living period with a dietary record for measuring responses to a large variety of meals consumed in a realistic context, where the role of external factors (e.g. exercise, sleep, time of day) on postprandial responses may be determined. For the first time this PREDICT study is built on top of a commercial product which will allow access to a much larger group of participants who are already collecting large amounts of data through digital and biochemical devices that can contribute to science.

Start: July 2020

PREDICT 2: Personalized Responses to Dietary Composition Trial 2

Foods in the human diet can affect the development of diseases over time, such as diabetes or heart disease. This is because the amount and types of foods in the diet eat can affect a person's weight, and because different foods are metabolised (processed) by the body in different ways. Scientists have also found that the bacteria in the human gut (the gut microbiome) affect their metabolism, weight and health and that, together with a person's diet and metabolism, could be used to predict appetite and how meals affect the levels of sugar (glucose) and fats (lipids) found in blood after eating. If blood sugar and fat are too high too often for too long, there is a greater chance of developing diseases such as diabetes and cardiovascular disease. The gut microbiome is different in different people. Only 10-20% of the types of bacteria found in the human gut are found in everyone. This might mean that the best diet to prevent disease needs matching to a person's gut microbiome and it might be possible to find personalised foods or diets that will help reduce the chance of developing chronic disease as well as metabolic syndrome. The study investigators are recruiting volunteers aged 18-70 years to take part in a study that aims to answer the questions above. Participants will be asked to consume standardised meals on up to 8 days while wearing glucose monitors (Abbott Freestyle Libre) to measure their blood sugar levels. Participants will also be required to prick their fingers at regular intervals to collect small amounts of blood, and to record their appetite, food, physical activity and sleep using apps and wearable devices. They will be asked to collect a fecal and saliva sample before consuming the standardised meals, and to provide a fasted blood sample at the end of the study period.

Start: June 2019

The FAITH! Trial: A mHealth Intervention to Improve Cardiovascular Health Among African-Americans

The purpose of this project is to apply a community-based participatory research (CBPR) approach to rigorously refine and test the feasibility and preliminary efficacy of an existing cardiovascular (CV) health and wellness digital application (app) prototype to improve CV health according to the American Heart Association Life's Simple 7 (LS7) framework among African-American (AA) adults within faith communities. The investigators hypothesize that the app-based intervention will be feasible and improve LS7 among AAs from baseline to 6-months post-intervention.

Start: February 2020

The Weaving Healthy Families Program to Promote Wellness and Resilience and Prevent Alcohol and Other Drug Abuse and Violence

Alcohol and other drug (AOD) abuse and violence in families are co-occurring risk factors that drive health disparities and mortality among Native Americans (NA), making the long-term goal of this research is to promote health and wellness, while preventing and reducing AOD abuse and violence in NA families by testing an efficacious, sustainable, culturally-relevant and family-centered intervention for cross-national dissemination. The central hypothesis is that the sustainable and community-based Weaving Healthy Families program, will reduce and postpone AOD use among NA adults and youth, decrease and prevent violence in families, and promote resilience and wellness (including mental health) among NA adults and youth. The expected outcomes of the proposed research are an efficacious, culturally relevant, and sustainable community based program to promote health and wellness that will address the factors that drive health disparities and promote individual, family, and community resilience.

Start: August 2020

Screening and Multiple Intervention on Lung Epidemics

This prospective randomized pilot trial will evaluate a multiple intervention program of prevention in lifelong smokers aiming at reduction of chronic inflammation status through treatment with low-dose acetylsalicylic acid (ASA), smoking cessation with cytisine, targeted modification of diet and physical activity, in addition to early diagnosis with annual ultra low-dose spiral computed tomography (LDCT).

Start: July 2019

Personalised Responses to Dietary Composition Trial

The foods we eat - our diet - can affect whether we develop diseases during our lives, such as diabetes or heart disease. This is because the amount and types of foods we eat can affect our weight, and because different foods are metabolised (processed) by the body in different ways. Scientists have also found that the bacteria in our guts (the gut microbiome) affects our metabolism, weight and health and that, together with a person's diet and metabolism, could be used to predict appetite and how meals affect levels of sugar (glucose) and fats (lipids) found in blood after eating. If blood sugar and fat are too high too often, there's a greater chance of developing diseases such as diabetes. The gut microbiome is different in different people. Only 10-20% of the types of bacteria found in our guts are found in everyone. This might mean that the best diet to prevent disease needs matching to a person's gut microbiome and it might be possible to find personalised foods or diets that will help reduce the chance of developing chronic disease as well as metabolic syndrome. The study investigators are recruiting volunteers aged 18 years or over from the TwinsUK cohort to take part in a study that aims to answer the questions above. The participants will need to come in for a clinical visit where they will give blood, stool, saliva and urine samples. The participants will also be given a standardised breakfast and lunch and fitted with a glucose monitor (Abbott Freestyle Libre-CE marked) to monitor their blood sugar levels. After the visit, the participants will be asked to eat standardised meals at home for breakfast for a further 12 days. Participants will also be required to prick their fingers at regular intervals to collect small amounts of blood, and to record constantly their appetite, food, physical activity and sleep using apps and wearable devices.

Start: June 2018

Low Starch Dietary Education Program vs. Traditional Treatment for PCOS

Compare weight loss and metabolic parameters in patients using a low starch dietary education program vs. traditional treatment (i.e., prescribing metformin, low calorie diet and exercise) for health improvement in women with PCOS.

Start: August 2018

Effect of an Anti-inflammatory Diet on Patients With Cervical Cancer

During radiation therapy (RT) to pelvic tumors, the small intestine, colon and rectum are inevitably included in the radiation field and are healthy tissues that suffer damage as an adverse effect. Pelvic radiation disease (PRD) is the group of gastrointestinal symptoms experienced by patients that receive pelvic radiation. Intestinal inflammation, tissue damage, oxidative stress and tumor metabolism lead the patient to a catabolic state associated with an increase in energy demands. Also, the painful abdominal symptoms restrict the patients' food intake, leading the patients that develop PRD to an increased risk to develop protein-energy malnutrition and micronutrient deficiencies, all of which affect the patients' quality of life. Studies developed in patients with inflammatory bowel disease have suggested that probiotics may have an anti-inflammatory effect in the intestine. In addition, micronutrients and trace elements provide antioxidant capacity and exert immune-modulating effects during periods of intestinal inflammation. Thus, probiotics and immune-modulating nutrients may provide a means to diminish intestinal inflammation and symptoms associated with PRD. In this project the investigators propose that the nutritional management of cervical cancer patients be based on an anti-inflammatory diet, taking into account the nutritional status, age, comorbidities that the patient may present and symptoms developed during treatment. The nutritional intervention will include food rich in immune-modulating nutrients: omega-3 fatty acids, soluble fiber, antioxidants and polyphenols, and probiotics.

Start: November 2018

Low-Carbohydrate Dietary Pattern on Glycemic Outcomes Trial

The proposed randomized controlled trial will test the effect of a low-carbohydrate diet on hemoglobin A1c among individuals with elevated hemoglobin A1c that are within the range of prediabetes or diabetes. Results may provide evidence about the role of carbohydrate restriction in individuals with or at high risk of type 2 diabetes.

Start: September 2018

Utilizing Protein During Weight Loss to Impact Physical Function

This study will 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 physical function, muscle mass, and weight loss maintenance in obese older adults. Participants will receive either a protein or carbohydrate supplement along with a behavioral weight loss intervention.

Start: May 2017