View clinical trials related to Healthy Adults.
Filter by:Objectives: To evaluate the role of human histo-blood group antigens in susceptibility to Norovirus infections. Description of Study Design: Healthy volunteers with different blood types and low antibody titers to the challenge strain will be challenged orally with a Norovirus in the CCCR inpatient facility. Subjects with resistant (non-secretors) or susceptible (secretors (of either A, B or O blood group)) to the challenge strain will be recruited. The challenge study will be conducted in two groups of twenty, each with approximately ten secretors and ten non-secretors. Three additional subjects per group will serve as alternates in the event that any of the study subjects are unavailable or become ineligible at the time of the inpatient study. Subjects will be monitored daily in the isolation facility for at least five days following this challenge for daily clinical and virological evaluations. Subjects will return to the investigational site for evaluation the day after discharge from the inpatient unit and about 30 days (28-35 days) post challenge. Study Endpoints: Norovirus infection as assessed by viral shedding, seroconversion and clinical illness assessed by the duration and severity of symptoms
This study was a controlled, cross-over, acute flavonoid intervention trial with younger and older adults. Subjects consumed a blueberry beverage during one visit and a control beverage on another. Cognitive function pre drink was assessed, blood and urine samples were taken as well as blood pressure and a measure of vascular reactivity. These outcome measures were taken at 2 and 5 hours post drink. It was predicted that the flavonoids in the blueberry drink would lead to improved performance on the cognitive tests and vascular reactivity measure compared to following the control drink. It was thought this could be due to increased vaso-dilation and improving blood flow to the brain which was investigated in an extension to the project where a sample of individuals underwent brain imaging in an MRI scanner pre and post a blueberry and a control drink.
The purpose of this study is to determine by how much, the ingestion of palm sugar increases blood glucose concentrations and what the corresponding glycaemic index is. The investigators estimate that the glycaemic index will be 68 (equal to that of sucrose).
Dietary fiber consumption may contribute to weight regulation by improving satiety. In an earlier study the investigators found that a muffin containing resistant starch was more effective than other fibers in altering satiety. The objective of this study is to determine if 2 resistant starches consumed in muffins alter satiety and whether a mixture of resistant starches is more effective than either alone in enhancing satiety.
This trial is designed to provide evidence of the efficacy of glutathione supplementation and health(GSH) and includes the assessment of both short term and long term effects. Based on previous laboratory animal studies and clinical data, the investigators anticipate that the effects of oral GSH supplementation will be progressive and cumulative. The study will also allow for the evaluation of effects of withdrawal of the supplement on the outcome variables.
This research study involves testing of a device that can give injections (shots) without the use of a needle.
The purpose of this study is to determine the safety and efficacy of VR-3 Herbal Blend and its effects on acute and chronic stress responses.
The purpose of this study is to determine the safety and tolerability of CoFactor in healthy subjects.
The purpose of this study is to determine the inflammatory response to 20,000 endotoxin units (EU) of CCRE (Clinical Center Reference Endotoxin) inhalation in a cohort of healthy volunteers. Preferably these subjects will have participated in ozone exposure studies, allowing a direct comparison of their responses to both endotoxin and ozone. Additionally, cardiovascular endpoints will be investigated with the CCRE exposure.