Clinical Research Directory

Pistachio Snacking and Metabolic Flexibility

The purpose of this study is to evaluate the effects of pistachio snacking on metabolic flexibility (at rest, during exercise, and in post-exercise recovery) in healthy overweight and obese adults. Secondary goals include evaluating effects on changes in diet quality, sleep characteristics, physical activity, and hormonal health in women. In randomized order, participants will complete four days of pistachio snacking and four days of normal dietary habits (control). For both conditions, primary outcomes of resting substrate metabolism, metabolic flexibility during exercise, and post-exercise substrate metabolism will be measured pre-post intervention via indirect calorimetry. Secondary outcome of diet quality (kcal, carb, fat, protein) will be measured pre-post intervention via diet log. Exploratory outcomes of daily physical activity (steps, intensity), nightly sleep characteristics (quantity, quality, latency, efficiency), and daytime sleepiness and hunger.

Stable Isotopes- Adults With Obesity

In a crossover design, 8 participants will receive caloric drinks containing stable isotopes. In one arm of the study, participants will consume 6 hourly drinks containing two stable isotopes. Repeated blood, breath, urine, and muscle biopsies will be taken. In the second arm, participants will consume 1 drink containing 75g glucose, labeled with two stable isotopes of glucose. Periodic blood and breath will be taken over three hours.

Eatit's Obesity Intervention: Effects on Weight, Eating Habits and Health

Obesity is a growing public health problem in Sweden, but access to care varies depending on geographical location. Eatit´s multimodal digitally dietitian-supported lifestyle intervention offers an accessible treatment alternative, but its clinical effects in practice need to be documented. The aim of this pilot study is to evaluate the effect of Eatit´s multimodal digitally dietitian-supported lifestyle intervention for weight loss in adults with obesity. The main question is: \- Does body weight change after six months of using the program? Secondary questions are: * Does waist size change after six months of using the program? * Do self-rated eating habits improve after six months of using the program? * Does self-rated health improve after six months of using the program? Participants will use the Eatit program for six months and answer questions about their weight, waist size, eating habits and health. The program integrates behavior change techniques with individualized nutrition counseling provided by licensed dietitians. * During the first three months, participants use Eatit's core program through the app, with weekly support by a dietitian via video calls and text messages. * The core program consists of a weekly reading section combined with a related homework assignment. * After completing the core program, participants continue with monthly video sessions with a dietitian, focusing on the skills that were most helpful during the initial phase or on areas such as receiving support to initiate physical activity. * Weight and waist size are recorded in the app every week. * Questionnaires on eating habits and health are completed at baseline, after three months, and after six months.

A Study to Investigate the Efficacy and Safety of Two Different Doses of Twice Daily Distal Jejunal-release Dextrose Beads Formulations Combined With a Gel Composition Compared to Placebos in Obese Subjects With Weight Related Comorbidities

The goal of this randomized, double-blind, placebo-controlled, phase IIa study is to demonstrate superiority on body weight reduction of two different doses of twice daily distal jejunal-release dextrose beads formulations (APHD 012 and APHD 002) combined with a gel composition, compared with two different doses of the placebo beads formulations (APHP 012 and APHD 002) combined with a gel composition in obese subjects with weight related comorbidities.

Therapeutic Potential of a Synbiotic to Improve Mental Health in Subjects With Obesity.

Obese individuals are a particularly vulnerable population for mental health problems, especially depression and anxiety. The aim of this study is to evaluate whether the intake of a synbiotic, composed of prebiotics and beneficial intestinal bacterial strains, is capable of producing changes in the gut microbiota and its functionality, improving metabolic and inflammatory parameters, intestinal function and appetite control in patients with obesity and psychological disorders. In addition, the production of neurotransmitters at the level of the gut-brain axis will be studied, as well as mood and quality of life. For this purpose, a prospective, randomized, doubleblind, placebo-controlled intervention study will be carried out in patients with obesity (BMI=30-40 kg/m2) and symptoms of anxiety and/or depression, or patients with obesity but without these psychological disorders (n=120). The groups will be randomly divided into two groups (n=60) according to the intake of a synbiotic (1 capsule/day composed of bifidobacterium, Lactobacillus and tannin-based phytocomplexes) or its corresponding placebo for 12 weeks. Individualized psychological and nutritional follow-up will be carried out, demographic, lifestyle and mental health variables will be collected, and biological samples will be collected before and after the intervention. In addition, all patients will undergo an assessment of body composition and nutritional status, together with cardiovascular risk factors and comorbidities (hypertension, dyslipidemia, DM2, insulin resistance). Inflammatory parameters (IL6, TNF , IL1b, adiponectin, PAI-1, IL10, resistin, adipsin), antioxidant capacity, intestinal function (zonulin, LPS, occludin, LBP, FABP2/I-FABP, -glucan, Reg3A), satiety, appetite control (Leptin, GLP1, GIP, Ghrelin, PP) and neurotransmitter production (cortisol, dopamine, serotonin, oxytocin) in plasma/serum, urine or saliva using ELISA Kits and Luminex XMAP technology will be analyzed. In addiition, the investigators will perform analysis of genetic markers of inflammatory and metabolic pathways (Nanostring technology), metabolomic profiling (NMR spectroscopy and PLS-DA) in plasma, and both content and diversity of the intestinal microbiota (16S rRNA amplicons, and direct metagenomic sequencing, with Illumina MiSeq technology) in faeces will be evaluated. Finally, the investigators will study in vitro the mechanism of action of colonic digest on complex cellular models that simulate the gut-brain axis (organ-on-chip model, OoC).

Modifications to Gastric Sleeve: Implications for GRED and Quality of Life

This is a prospective randomized clinical trial evaluating the impact of antrum and fundus calibration during laparoscopic vertical gastrectomy (VG) on postoperative gastroesophageal reflux disease (GERD), quality of life, and surgical costs. Eligible participants are adults with morbid obesity (BMI ≥35 kg/m²) undergoing LSG. Patients are randomized into four groups based on whether antral and/or fundal calibration is performed. Primary outcomes include the incidence of de novo GERD at 12 months. Secondary outcomes include postoperative quality of life, vomiting , surgical complications, weight loss, and operative costs. The study aims to optimize the LSG technique by identifying anatomical modifications that minimize GERD while improving clinical outcomes