221 Clinical Trials for Various Conditions
Citrulline dietary supplements are of interest for improving cardiovascular and exercise performance. The health benefits of citrulline are attributable to its ability to increase arginine levels in the body through the intestinal-renal arginine conversion pathway. From a dietary supplementation standpoint, citrulline offers advantages over arginine due to its reduced first-pass metabolism and ready conversion to arginine within the body. While L-citrulline is the most widely used citrulline dietary supplement, additional salt forms such as citrulline maleate and citrulline HCl may provide improvements in the delivery of arginine to the body. The present study compared the single-dose pharmacokinetics of L-citrulline and citrulline HCl formulations in healthy human subjects. A total of 17 subjects were randomly assigned to groups receiving either 6 g of L-citrulline, 6 g of citrulline HCl or 2 g of citrulline HCl. The resulting increases in citrulline and arginine in plasma and urine samples were determined using liquid chromatography-multiple reaction monitoring mass spectrometry (LC-MRM/MS). All citrulline dietary supplements examined produced time-dependent increases in plasma citrulline and arginine. Both maximal plasma concentration (Cmax) and area under the plasma vs time curve (AUC) for citrulline were modestly reduced in the 6 g citrulline HCl treatment group, the resulting arginine Cmax and AUCs were similar for both L-citrulline and citrulline HCl at the 6 g dose. While the 2 g dose of citrulline HCl had reduced Cmax and AUC values compared to 6 g doses, the time to reach peak levels of arginine were significantly shorter. Furthermore, examination of the relative arginine bioavailability achieved with the 6 g and 2 g citrulline HCl compared to the 6 g L-citrulline was approximately 120% and 215%, respectively, consistent with an improved citrulline to arginine conversion efficiency with the citrulline HCl formulations.
The aim of this study is to determine how regular consumption of Synbiotic+, a dietary supplement that contains prebiotics, probiotics, and postbiotics, impacts functional gastrointestinal health, markers of intestinal inflammation and immune health, and influences mood and behavior. The primary outcome will be to assess gastrointestinal health using bowel movement tracking, self-report and objective assessments of gastrointestinal symptom severity, stool levels of short chain fatty acids, changes in the gut microbiota, including recovery of LGG and BB-12, and functional measures of the microbiome. Secondary outcomes will include stool and blood markers of gut barrier function and intestinal inflammation, immune health, and self-assessments of stress, anxiety, sleep, and quality of life.
This study was a prospective randomized clinical study. There was interventional treatment for a total of 8 weeks including a 2-week washout period. The subjects attended four appointments in the clinic throughout the duration of the study. Study Primary Objective: • To assess improvement in bloating symptoms Study Secondary Objectives: * To assess safety and tolerability of the formulation * To compare the time taken for perceptual improvement in bloating/distention * Enzyme blood assays * To assess quality of life indices
A 6-month virtual two-armed randomized double-blind placebo-controlled clinical trial. Participants will take NuBest Tall Growth Protein Powder or a placebo daily. Parents will complete questionnaires at baseline and monthly, and children will undergo cognitive assessments and height/weight measurements at specified intervals.
Healthy Adult subjects
The primary purpose of this study is to compare the safety and effectiveness of commercially available dietary supplements believed to increase coenzyme Q10 (CoQ10) concentrations. An 8-week, randomized, placebo-controlled clinical trial will be conducted comparing the effectiveness of four commercially available dietary supplements on increasing CoQ10 concentrations and self-reported health outcomes.
This study evaluates the efficacy of Scale Media's HLV Clinical Formula Hair Vitamins on the health and appearance of hair, focusing on growth, volume, dullness, overall health, hair shedding, fullness, and strength. It is a randomized controlled trial with 50 female-at-birth participants experiencing self-perceived hair thinning.
This study is designed to evaluate the safety and tolerability of two distinct dietary supplement beverage formulations designed to maintain normal blood pressure. In this study, safety and tolerability will be assessed among otherwise healthy, normotensive individuals.
The purpose of this study is to explore how the dietary supplement L-Phenylalanine affects the production of the metabolite phenylpropionic acid (PPA) and changes fungal populations of the gut microbiome.
This study will be conducted to determine the effect of daily Tetrasol consumption in supporting gut health using assessments of gastrointestinal symptoms (GSRS) and bowel habits (BSS) as primary outcome measures. The investigators also intend to explore fecal and blood biomarkers of intestinal permeability/function, determination of anxiety and stress levels through both validated assessments and saliva and blood biomarkers, establishment of intervention safety and tolerability through comprehensive metabolic panels and overall compliance, explore the effects of the intervention on inflammation and acute stress (Cold Presser Test), blood lipid profiles, and gut microbiota composition as secondary outcomes.
The primary objective of this single-arm pilot study is to investigate the effects of an encapsulated calcium butyrate dietary supplement on gastrointestinal (GI) health outcomes in healthy adults, including GI symptom severity (e.g., gas/flatulence and abdominal bloating), bowel habits (frequency and consistency), digestion-associated quality of life, and measures of GI permeability.
This is a single center, randomized, double blind, placebo-controlled, crossover study to determine the acute effect of a developmental dietary supplement liquid shot product on cognitive task performance and perceived effect measures related to mood and mental energy. The study will be conducted in healthy participants.
A home placement, randomized, double blind, placebo-controlled, study to determine the effect of dietary liquid shot beverage products on self-reported measures of sleep, stress and mood on generally healthy participants with current self-reported mild/moderate sleep difficulties (but not clinical insomnia) and mild/moderate stress.
This is a single institution phase II randomized study evaluating the potential benefits of a supplement, tart cherry juice at high- versus low-doses, to prevent taxane induced peripheral neuropathy in breast and ovarian cancer patients undergoing paclitaxel chemotherapy. Eligible participants enrolled onto the study will be block randomized in a 1:1 allocation to either the tart cherry juice high-dose group (Arm 1) or the tart cherry juice low-dose group (Arm 2).
This study is a randomized, two-arm, double-blind, placebo-controlled, crossover study of N=36 apparently healthy men and women. This study will assess the effect of a blend of dietary supplements on blood and breath levels after consuming alcohol.
As the body ages, the skin experiences natural changes in structure and composition. These changes may manifest visibly as increased skin dryness, wrinkling, and a loss of firmness/elasticity. In this double-blind, randomized, placebo-controlled trial, the investigators will recruit healthy men and women with mild to moderate signs of skin aging and randomly assign them to either receive a HyaCera™ or placebo for 12 weeks. The investigators will perform a series of objective and subjective measurements to assess changes in skin condition. The investigators hypothesize that consumption of HyaCera™ leads to improvements in the general condition of the skin including skin hydration, crow's feet wrinkling, and other skin aging parameters.
The purpose of this study is to look at how butyrate levels change in participants' stool after they are on a plant-based diet or dietary supplements (omega-3, curcumin or probiotics) for 2 weeks. All participants will have smoldering multiple myeloma (SMM). The researchers will compare how the different dietary changes affect butyrate levels in participants' stool.
S-adenosylhomocysteine (SAH) is the end-product of methylation reactions in the body and the precursor to homocysteine. Elevated SAH in the blood is a reflection of the dysregulation of what is known as the S-adenosylmethionine (SAM) cycle and has been associated with poor health outcomes. The SAM cycle is a series of reversible reactions necessary for the regulation of many processes in the body. The goal of this clinical trial is to assess the ability of a dietary supplement to support healthy plasma SAH levels in individuals with high plasma SAH. Participants in the study will attend a total of 4 clinic visits and consume study product daily for 12 weeks.
This study was designed to determine if a dietary supplement containing extracts of American ginseng, bacopa monnieri and coffee fruit can enhance cognitive performance in a population of trained athletes.
This study was a double-blind, randomized, placebo-controlled, clinical trial with two parallel groups. Participants reported to a single investigational center in Ohio (i.e., The Center for Applied Health Sciences) during the 12 week trial.
This study is a randomized, double-blind, placebo-controlled trial. Healthy, exercising adult males and females will be recruited for participation. After providing informed consent, each participant will be randomized to one of three groups: 1) OxyShred thermogenic fat burner; 2) Placebo (PL); and 3) Control. All participants will complete a baseline laboratory visit consisting of assessments of body composition, anthropometry, metabolism, hemodynamics, dietary intake, exercise habits, and subjective variables. Participants in the two intervention groups (i.e., OxyShred and PL) will then be given dietary supplements for daily consumption, including OxyShred/PL and protein powder. Participants in all groups will complete the 4-week study and follow their usual training and nutrition habits - besides increased protein intake in the OxyShred and PL groups - along with questionnaires to assess compliance with the study protocol and potential side effects of supplementation. Following this 4-week period, participants will complete a second laboratory visit, where all baseline assessments will be repeated. The effects of group (OxyShred, PL, and control) and time (baseline, 4 weeks) will be statistically examined using linear models, along with appropriate post-hoc tests.
The purpose of the present research study is to evaluate the claims about the supplement influencing cognitive function that may impact performance on cognitive task and related biochemical measures. The synergistic administration of Pyrroloquinoline Quinone and molecular Hydrogen (in the form of Alpha Hope) will be evaluated in adults without a diagnosis of disease (i.e., otherwise healthy adults-the population the supplement is marketed to) on certain biochemical markers, subject's self-assessed wellness, and functional measurements determined via computer tests.
This study is a double-blind, randomized, two-arm, placebo-controlled trial of apparently healthy men and women to be recruited at a single investigational center in Northeast Ohio (i.e. The Center for Applied Health Sciences). Subjects will attend four study visits. During Visit 1, subjects will be screened for participation (i.e., medical history, physical exam, routine blood work \[also HgA1c, insulin\], background baseline diet). Over the next 12 weeks, subjects will attend Visits 2-4, wherein assessments of serum glucose, insulin, HOMA-IR, 2-hour glucose tolerance test (GTT), HgA1c, C-reactive protein, adiponectin, ferritin, waist circumference, quality of life questionnaire, and various visual analog scales for appetite, satiety, and cravings will be made.
The purpose of this study is to determine the short-term effect of a nutritional program consisting of a yerba mate supplement, fiber supplement, and intermittent fasting on glycemic variability in men and women with risk factors for impaired fasting glucose.
The primary objective of this study is to evaluate the effects of a proprietary oral supplement on the sleep health and quality of people with sleep problems. It is a double-blinded placebo-controlled crossover clinical study.
The purpose of this research study is to evaluate the effect of a combination of 3 food components to improve the quality of life in people who have trouble sleeping. Ten subjects with insomnia will drink 2 ounces of the supplement or a placebo for 1 week and after a 2 weeks washout period, will take the treatment they did not take the first week. Questionnaires to evaluate quality of life, and a sleep study will be done before and after each treatment week.
The purpose of this study is to evaluate a well-characterized, commercially available cinnamon dietary supplement as a precipitant of pharmacokinetic interactions with cytochrome P450 (CYP) 2A6 drug substrates in healthy volunteers. Nicotine gum will be used as the CYP2A6 probe drug (i.e., positive control) and letrozole as a high-impact object drug. Results will be used to inform future research on the potential use of cinnamon as a smoking cessation agent, as well as the clinical impact on pharmacotherapeutic regimens involving letrozole in cancer patients.
Complex oligosaccharides can alter the gut microbiome by aiding in the growth of certain organisms, and possibly, inhibiting others. The synergy with a probiotic may enhance gastrointestinal colonization.
The purpose of this investigation is to determine if supplementation with the 4D dietary supplement impacts perceptual-cognitive and visual-motor skills in healthy individuals.
This study tested the effects of a botanical blend to a caffeine and a placebo condition on 1) self-reported alertness, anxiety, and headaches 2) multiple measures of attention 3) physical performance and 4) stress biomarkers.