7 Clinical Trials for Various Conditions
This is a virtual, single-arm clinical trial that will last 12 weeks. Participants will trial three different products, each for 4 weeks. Participants will trial Clevr Blends Sleeptime during weeks 1-4, Clevr Matcha for weeks 5-8, and Clevr Blends Chai for weeks 9-12. Participants will complete questionnaires at Baseline and Week 2, 4, 6, 8, 10, and 12. In addition to data will be collected from participants' sleep tracking devices at Baseline, Week 2, and Week 4.
Research has shown that acute ingestion of Paraxanthine (1,7-dimethylxanthine, PXN) can enhance various markers of focus, including memory, reaction time, and attention in healthy adults. To assess these effects, this placebo-controlled crossover trial will compare the effects of 200 and 300mg of PXN to a placebo control. Participants will abstain from caffeine for 3 days, before taking the first test/placebo product for 3 consecutive days. Participants will complete questionnaires at 30, 60, 90, and 120 minutes after ingestion on Day 1 and Day 3 of ingestion. Participants will have a 3-day washout period before trialing the next test product/placebo.
The purpose of this online research study is to determine whether or not a gradual caffeine reduction program developed at Johns Hopkins can help people reduce their caffeine use. The investigators will provide materials to help guide caffeine reduction and ask questions to track caffeine use over several weeks. The investigators will also assess how reducing caffeine may benefit common caffeine-related problems such as anxiety, sleep disturbances, and gastrointestinal distress. The study will also determine whether or not people like participating in this caffeine reduction program in an online format.
Lowering sugar-sweetened beverage (SSB) consumption is a central component of lifestyle behavior change aimed at preventing and managing obesity, yet effective reduction of SSB intakes has been met with many challenges. While their palatability, accessibility, publicity, affordability, and social acceptability contribute to frequent and sustained SSB consumption, their caffeine and sugar content may further encourage continued intake. Although adverse health consequences of excessive SSB consumption are well documented, the extent to which their pleasant taste (due primarily to their sugar content) and post-ingestive effects (due to their sugar and/or caffeine content) positively reinforce consumption among children has not been elucidated. The purpose of this study is to conduct a pilot intervention to examine the feasibility of removing caffeinated SSBs from the child diet and to explore whether caffeinated SSB removal induces withdrawal symptoms in 8-11 (3rd-5th grade) year old children. Participants will be randomly assigned to replace their usual caffeinated SSB consumption with either caffeinated SSBs, caffeine-free SSBs or sparkling water provided by the study team for two weeks.
Recent research has shown that some individuals become addicted to or dependent on caffeine and are unable to quit or reduce caffeine consumption despite a persistent desire to do so. The aims of the current study are to characterize caffeine use among individuals with physical or psychological dependence on caffeine and evaluate a manual-based intervention to promote caffeine reduction and cessation.
Recent research has established that some individuals report that they are unable to cease caffeine use, despite feeling that caffeine is posing a health risk or causing significant impairment in their daily activities. Despite the high rates of unsuccessful efforts to cease or control caffeine use in the population, there has been little research on the parameters of successful caffeine reduction and no research on caffeine cessation. The goals of the study are as follows: 1. evaluate the applicability of DSM-IV dependence criteria for self-reported problematic caffeine use. 2. evaluate characteristics (e.g, co-morbid psychopathology) of individuals who report that they have had difficulty quitting caffeine use on their own and who are seeking treatment for caffeine use. 3. test the efficacy of a caffeine reduction treatment administered to individuals who would like to quit/reduce caffeine use, but have found it difficult to do so in the past.
The purpose of this study to investigate the addictive properties of soda and other sugar sweetened beverages (SBBs) in teenagers aged 13-18 years. It is hypothesized that participants who were regularly consuming sweetened and caffeinated beverages will experience symptoms typical of caffeine withdrawal, such as headache and fatigue, during the SSB withdrawal period.