Dietary Interventions — Effect of Dietary Interventions on Intestinal Flora and Metabolism
Citation(s)
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Leng Xuejun et al. Evaluation and comparison with FibroTouch® the degree of liver fibrosis in the patients with nonalcoholic fatty liver disease of different BMI levels. Journal of Clinical Hepatology, 34(9): 1891-1895.
Thompson SV, Hannon BA, An R, Holscher HD Effects of isolated soluble fiber supplementation on body weight, glycemia, and insulinemia in adults with overweight and obesity: a systematic review and meta-analysis of randomized controlled trials. Am J Clin Nutr. 2017 Dec;106(6):1514-1528. doi: 10.3945/ajcn.117.163246. Epub 2017 Nov 1. Review.
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Effect of Dietary Interventions in Overweight and Obese Patients
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
