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Caffeine

All articles tagged with #caffeine

Caffeine Linked to Reduced Brain Inflammation and Mood Benefits in Rodent Studies
science4 days ago

Caffeine Linked to Reduced Brain Inflammation and Mood Benefits in Rodent Studies

A systematic review of 17 rodent experiments finds caffeine consistently lowers brain inflammation and improves anxiety- and depression-like behaviors, likely via adenosine receptor blockade, increased brain-derived neurotrophic factor, and reduced pro-inflammatory cytokines and oxidative stress; caffeine's effects are comparable to some antidepressants in animals, but most data come from adult male rodents with varied dosing, so human studies are needed to determine safety and applicability.

via PsyPost|
#anxiety#caffeine#depression
Moderate Caffeine From Coffee or Tea Linked to Lower Dementia Risk
health17 days ago

Moderate Caffeine From Coffee or Tea Linked to Lower Dementia Risk

A large, long-term study of about 131,000–132,000 people followed for up to 43 years found that consuming two to three cups of caffeinated coffee daily or one to two cups of caffeinated tea daily was associated with roughly 15–20% lower dementia risk versus little or no caffeine; benefits for coffee plateaued beyond about 2.5 cups per day. The study did not prove causation and could reflect other healthy behaviors, but adjustments for various factors strengthen the association. Decaf showed no similar benefit, and stronger signals appeared before age 75. The study also noted less subjective cognitive decline and slightly better cognitive scores in some subgroups, suggesting caffeine may support brain health via inflammation and vascular pathways, though more research is needed.

via The New York Times|
#caffeine#coffee#dementia
Long-Term Coffee and Tea Intake Linked to Lower Dementia Risk, Large Harvard Study Finds
health17 days ago

Long-Term Coffee and Tea Intake Linked to Lower Dementia Risk, Large Harvard Study Finds

A Harvard-led study of 131,821 participants followed for up to 43 years found that drinking two to three cups of caffeinated coffee daily or one to two cups of tea daily was associated with an ~18% lower risk of dementia, lower prevalence of subjective cognitive decline, and better performance on cognitive tests, with decaffeinated coffee showing no benefits. Results held across genetic risk groups, suggesting caffeine may be the active protective factor, though the effect size is small and caffeine should be one part of a broader cognitive-health strategy.

via Harvard Gazette|
#caffeinated-coffee#caffeine#cognitive-decline
Moderate caffeine linked to lower dementia risk in large study
health17 days ago

Moderate caffeine linked to lower dementia risk in large study

A large study of 131,821 participants from the Nurses’ Health Study and the Health Professionals Follow-Up Study found that consuming two to three cups of caffeinated coffee daily or one to two cups of caffeinated tea is associated with an ~18% lower risk of dementia and slower cognitive decline, with no similar benefit seen from decaf coffee. The researchers caution that the study shows association, not causation, and lifestyle factors could contribute. Benefits plateau at the noted intake levels, and further work is needed to understand metabolism and timing, while caffeine and polyphenols in coffee/tea are thought to contribute to cognitive health.

via WBUR|
#caffeine#coffee#cognition
Small Daily Cups of Coffee or Tea Linked to Lower Dementia Risk, Large Study Finds
health17 days ago

Small Daily Cups of Coffee or Tea Linked to Lower Dementia Risk, Large Study Finds

A large observational study of over 130,000 people (Nurses’ Health Study and Health Professionals Follow-up Study) links midlife caffeinated coffee and tea intake with a lower risk of dementia later in life. The strongest associations were two to three cups of coffee or one to two cups of tea daily, with coffee users about 18% and tea users about 14% less likely to develop dementia. Decaffeinated options did not show the same benefit. Because the study is observational, it cannot prove causation; remaining cautious about caffeine intake is advised, and coffee/tea should complement other brain-healthy lifestyle habits.

via cnn.com|
#caffeine#coffee#dementia
Daily coffee or tea may reduce dementia risk, large study finds
health18 days ago

Daily coffee or tea may reduce dementia risk, large study finds

A study of 131,821 US adults followed for up to 43 years found that people who drank two to three cups of caffeinated coffee or one to two cups of caffeinated tea daily had about a 15-20% lower risk of dementia than those who drank little or none, and caffeinated drinkers showed slightly slower cognitive decline and better test scores compared with decaf. The researchers note causality cannot be established and there may be other factors at play; decaf coffee showed no benefit. More research is needed to confirm the link and understand underlying mechanisms.

via The Guardian|
#brain-health#caffeine#coffee
Coffee and blood pressure: small, temporary bumps, not a hypertension risk
health23 days ago

Coffee and blood pressure: small, temporary bumps, not a hypertension risk

Coffee can raise blood pressure briefly, especially in new drinkers or those with hypertension, as caffeine stimulates heart rate and constricts vessels. Blood caffeine peaks 30 minutes to 2 hours after a cup and has a 3–6 hour half-life. Studies typically report systolic BP rises of about 3–15 mmHg and diastolic rises of 4–13 mmHg, with individual responses varying by genetics, age, and habitual intake. Overall, coffee is not consistently linked to a higher hypertension risk, though very high BP patients should discuss intake with a doctor. Practical guidance: know your BP, limit caffeine to about four cups a day (or switch to decaf if needed), avoid caffeine before BP measurement, and consider reducing or timing intake if your BP is elevated.

via The Conversation|
#blood-pressure#caffeine#cardiovascular-health
Coffee and digestion: who benefits and why timing matters
lifestyle25 days ago

Coffee and digestion: who benefits and why timing matters

Caffeine can stimulate gut motility and help some people digest after meals, but it can worsen digestion for those with irritable bowel syndrome. Regular coffee intake is linked to a healthier gut microbiome and polyphenols, though caffeine's long half-life can disrupt sleep, which harms gut health. Experts advise caffeinated coffee before noon and switching to decaf or herbal tea later in the day.

via The Guardian|
#caffeine#coffee#digestion
health1 month ago

Pre-workout risks: doctors warn popular gym supplements may affect libido and erections

A UK-based doctor warns that commonly used pre-workout supplements—rich in caffeine and stimulants—can be linked to erectile dysfunction and reduced libido, likely due to a fight-or-flight response, narrowed blood vessels, and disrupted sleep; researchers also note sleep quality and testosterone levels can be affected, so reducing stimulants, prioritising sleep, and consulting a GP if symptoms persist.

via tyla.com|
#caffeine#erectile-dysfunction#health
Blood Caffeine Levels Linked to Body Fat and Diabetes Risk, Study Finds
health1 month ago

Blood Caffeine Levels Linked to Body Fat and Diabetes Risk, Study Finds

A 2023 study suggests that higher caffeine levels in the blood, influenced by genetic factors, are associated with lower body fat and a reduced risk of type 2 diabetes, though no link was found with cardiovascular diseases. The findings indicate potential benefits of caffeine in metabolism and weight management, but further research is needed to confirm causality and long-term effects.

via ScienceAlert|
#bmi#body-fat#caffeine