All articles tagged with #caffeine
Drinking soda every day delivers a short-lived caffeine-and-sugar energy boost but can cause gut discomfort and, in the long term, belly fat and higher risks of heart disease, metabolic syndrome, diabetes, kidney problems and brain inflammation; even diet soda isn’t risk-free due to artificial sweeteners—consider replacing it with sparkling water or infused drinks and taper caffeine gradually while staying hydrated.
A large, long-term study of 131,821 healthcare professionals found that moderate caffeinated coffee or tea intake—about 250–300 mg of caffeine daily (roughly two to three cups of coffee)—is associated with up to a 35% lower risk of dementia, especially before age 75, with benefits leveling off at higher intakes. Decaf users sometimes showed faster memory decline, and tea may offer strong protection at 1–2 cups daily; overall, moderation appears key and results may be influenced by other lifestyle factors.
A study in fission yeast finds caffeine activates the energy sensor AMPK via components like Ssp1/Ssp2/Amk2, reprogramming metabolism and stress responses, accelerating mitosis and extending lifespan under non-dividing conditions; the effect is indirect, not through TORC1, and aligns caffeine with aging pathways also targeted by therapies such as metformin; a 2026 bioRxiv follow-up highlights Bro1's role linking TOR signaling to cellular maintenance and longevity.
New research from University College Cork shows caffeinated and decaf coffee rewire the gut microbiome and gut-brain axis, boosting mood and reducing stress. Decaf coffee improved learning and memory, while caffeinated coffee enhanced attention and reduced anxiety; effects point to multiple mechanisms beyond caffeine, including changes in specific gut bacteria and metabolites.
A 2026 UK Biobank study of 461,586 adults over 13.4 years finds that two to three cups of coffee daily are linked to a lower risk of mood and stress disorders, with the benefit seen across caffeinated and decaf varieties and different coffee types. The protective effect follows a J-shaped curve: benefits peak at two to three cups and may diminish with higher intake. Possible mechanisms include caffeine blocking adenosine receptors, anti-inflammatory effects from chlorogenic acids, and behavioral benefits from reduced fatigue. Effects were stronger in men, while women metabolize caffeine more slowly, potentially altering the benefit. The study is observational, so it cannot prove causation or replace standard mental-health care such as sleep, exercise, diet, and social connection.
Drinking Diet Coke daily isn’t harmless: its artificial sweeteners and caffeine are considered safe within limits, but regular use may influence taste preferences, potentially alter gut microbiota and metabolic regulation, and can affect sleep or anxiety in sensitive individuals. The drink’s acidity can contribute to dental enamel erosion. Regulators deem the ingredients safe, but experts advise moderation and suggest swapping to water or unsweetened beverages for everyday hydration; occasional Diet Coke is fine, yet cutting back is wise if you’re consuming multiple cans a day.
A study from University College Cork found that both caffeinated and decaffeinated coffee can improve mood and cognitive performance and alter the gut microbiome. Caffeine was linked to reduced anxiety and better attention, while decaf boosted sleep, physical activity, and memory; both forms triggered gut microbiome shifts, indicating coffee's effects extend beyond caffeine via the gut-brain axis. The findings rely on self-reported mood and were published in Nature Communications.
A California federal class-action accuses Trader Joe’s French Roast Low Acid coffee of mislabeling as fully caffeinated, arguing testing shows it contains about half the caffeine of regular blends and should be labeled as half-caff; plaintiffs seek class certification (CA, IL, NY) and damages for deceptive advertising.
A California class-action alleges Trader Joe's French Roast Low Acid coffee is deceptively labeled, failing to disclose its lower caffeine content; testing shows it contains about half the caffeine of a regular blend, yet the label does not indicate 'low caffeine' or 'half-caff.' The four plaintiffs, who bought the product nationwide, seek damages and an injunction to stop selling the misleading coffee.
A Nature Communications study with 62 participants suggests habitual coffee consumption (three to five cups daily) alters the gut microbiome and is linked to lower stress, depression, and impulsivity. Both caffeinated and decaf coffee showed mood benefits, with caffeine intake tied to reduced anxiety and better focus, and decaf linked to improved learning and episodic memory—potentially due to non-caffeine components like polyphenols. Microbiome changes included higher levels of beneficial bacteria such as Eggerthella and Cryptobacterium curtum. The findings are limited by a small, self-reported sample and lack of control for other dietary factors, so conclusions should be cautious; study published in Nature Communications.
Drinking diet soda daily can cut calories when it replaces regular soda and won’t spike blood sugar, but it offers little nutritional value. Artificial sweeteners may influence cravings and gut microbiome, with mixed, not definitive, evidence about long-term health effects. For most people, one can a day is generally fine, but it isn’t a hydrating beverage and caffeine can affect sleep for some. The better approach is to prioritize water or unsweetened drinks and consider what diet soda is replacing in your overall diet.
New research finds sleep deprivation disrupts the hippocampal CA2 circuit involved in social memory, but caffeine pretreatment reverses the deficits by modulating adenosine receptors, restoring synaptic plasticity and social recognition without broad brain overstimulation.
A new study finds caffeine-influenced Argentine ants learn faster and take straighter routes to sugar rewards, reducing foraging time by up to 38% at intermediate caffeine doses without increasing speed. This could enhance bait effectiveness for pest control, but field tests and safety assessments are still needed.
Coffee contains phytochemicals like chlorogenic acid and caffeine that may help reduce inflammation, support cardiovascular and metabolic health, and lower risks of dementia and mood decline. The FDA notes 3–4 cups per day is generally safe for most adults, but individual tolerance varies and adding sugars or heavy creams can negate benefits. Decaf offers similar health effects minus caffeine.
A Texas teen's death linked to energy drink caffeine has renewed concerns about the safety of caffeinated beverages for young people, with a lawsuit alleging excessive caffeine contributed to the death and grieving families calling for stronger safeguards; the case also recalls Anais Fournier's 2011 death to highlight potential preventable risks.