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Discover 13,548 clinical trials near Boston, Massachusetts. Find research studies in your area.
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NCT04919876
Aging is a complex and inevitable biological process that is associated with numerous chronic health conditions and the development and progression of diseases. It is manifested partly by a progressive decline in fitness and an increase in death. The key to healthy aging is a healthy lifestyle, including eating a variety of healthy foods and frequently participating in physical activities. Supplements made from widely consumed plant products have the potential for promoting healthy aging. However, more human data is required to substantiate this potential. Thus, the purpose of this study is to determine examining whether older adults taking a fruit/vegetable supplement for 6 weeks will have biochemical values of stool, blood, and urine similar to those of younger adults. The fruit/vegetable supplement contains a variety of vitamins and minerals and other nutrients that have been known to be beneficial to human health and many Americans may consume inadequate amounts in their daily diet. In order for us to understand how these nutrients may benefit health, we are interested in determining whether they can modify biochemical values of blood that occur in the body after taking the supplement for 6 weeks. We aim to have 40 older subjects and 20 younger subjects complete the trial. The enrolled subjects will consume prepackaged study meals for approximately 8 weeks and provide blood samples. The study meals will comprise foods most Americans eat every day. The older subjects, but not younger subjects, will take the assigned supplement. The younger subjects will consume the study meals for 2 weeks and provide one blood sample during the study.
NCT03361384
The current study is the first empirical investigation that directly addresses the correspondence between responses regarding indicators of risky sexual behavior while under the influence of alcohol in the laboratory and the occurrence of sexually risky behavior while under the influence of alcohol in the natural environment, by use of Ecological Sampling Methodology (ESM). The study will allow us to compare and contrast implicit and explicit assessments of sexual risk in respect to future behavior in the natural environment. The data obtained will thus provide new information regarding the external validity of alcohol administration studies of sexual risk behavior and will provide information to optimize the selection of dependent measures. The current study also represents the first attempt to test a causal model linking alcohol intoxication and risky sexual behavior as a function of both automatic, reflexive, approach tendencies and effortful, deliberative, self-control (operationalized by executive working memory in this application). The ESM study will augment the findings of the experiment by providing a detailed assessment of contextual factors that affect sexual risk behavior as well as replicating and extending the findings of the experiment to sexual risk situations in the natural environment. Finally, to our knowledge there has been only one experimental study of alcohol and sexual risk in MSM (Maisto, Palfai, Vanable, Heath, \& Woolf-King, 2012), which is remarkable given that MSM have been identified as the population at highest risk to contract the HIV in the U.S. since the virus was identified in the early 1980s. Thus the proposed research is only the second attempt to add to an understanding of the connections among alcohol, cognitive processes, and sexual risk behaviors in MSM.