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4Caffeine is a search engine built for people who live on, study, or sell caffeine-related products. We combine multiple indexes, curated sources, and AI tools to surface accurate, useful results across research, news, shopping, and community resources. Use the site to research caffeine effects, discover products, follow news, or get tailored answers from our AI assistant. Part of the 4SEARCH network of topic specific search engines.

Latest stories

Regular coffee drinking linked to changes in gut functions

A swallowable sensor helped researchers study how regular coffee drinking relates to acidity and movement inside the gut. Editor: Mac Oliveau/ University of Copenhagen Writer: Maria Hornbek A Danish study links regular coffee drinking to lower small-intestinal pH and greater bacterial richness in stool. (CREDIT: Shutterstock) Frequent coffee drinkers in…

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