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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 Articles
Study: Reconsider Drinking Boiling Hot Coffee/Tea
3+ day, 10+ hour ago (165+ words) BBC Regularly drinking beverages like tea and coffee at very hot temperatures increases the risk... Regularly drinking beverages like tea and coffee at very hot temperatures increases the risk of cancer of the food pipe or gullet, known as oesophageal…...
Body clock may speed surgical recovery
5+ day, 10+ hour ago (593+ words) Rangahau me te auahatanga Research and innovation Faculty of Medical and Health Sciences, Health and medicine, Sustainable impact Morning light and other measures that support the body’s natural rhythms could help patients heal faster and get home sooner after surgery....
Too much coffee may weaken bones, according to new study
6+ day, 1+ hour ago (307+ words) A new study has found that reaching for cup after cup of coffee may bring about some unhealthy effects on your body. Researchers at Flinders University followed 9,704 women aged 65 and older for about 10 years and asked how much coffee and…...
Coffee’s heart health link looks stronger without sweeteners
1+ week, 3+ day ago (180+ words) A recent study published in the European Journal of Nutrition found that moderate consumption of unsweetened coffee was associated with a lower risk of cardiovascular disease, while sweetened coffee did not show the same protective association. The study, which included…...
Social Jet Lag: How different weekend and weekday sleep schedules can affect your mood
1+ week, 4+ day ago (716+ words) You sleep in until 10 AM on Saturday and Sunday, revelling in the luxury of no alarm clock. Then Monday hits, and your 6:30 AM wake-up feels like you've been teleported across three time zones. You're groggy, irritable, and struggling to focus....
Coffee and Caffeine Can Affect Heart Health in a Surprising Way
2+ week, 1+ hour ago (444+ words) For years, people with atrial fibrillation have often been cautious about coffee. The reasoning seems straightforward: caffeine is a stimulant, AFib involves an abnormal heart rhythm, so drinking something that can make your heart beat faster sounds like a questionable…...
Wired and Tired: How Caffeine Is Reshaping Teen Sleep
2+ week, 3+ day ago (620+ words) BY MAHIMA SAMRAIK August 26, 2026 If your teenager reaches for an energy drink before school, grabs coffee with friends on weekends, or games late into the night with something fizzy nearby, they are far from alone. Nearly one in four American…...
Scientists Develop an Implant That Could Help the Body Clock Recover From Jet Lag Faster
2+ week, 3+ day ago (403+ words) Jet lag and shift work can throw the body’s internal clock off course for days, disturbing sleep, altering metabolism, and contributing to other health effects. Researchers at Rice University, supported by the Rice Biotech Launch Pad, and Northwestern University have…...
Doctors have long advised many atrial-fibrillation patients to avoid coffee. But a 2025 randomized trial found that regular coffee drinkers assigned one caffeinated cup a day after cardioversion had a 39% lower hazard of AF or atrial-flutter recurrence than those told to avoid caffeine—47% versus 64% over six months.
2+ week, 4+ day ago (1642+ words) A randomized trial found less AF or atrial-flutter recurrence among previous or current coffee drinkers assigned caffeinated coffee after cardioversion, but its population and intervention make the result narrower than a general coffee recommendation. By The Long View · Edited by…...