London Daily

Focus on the big picture.
Wednesday, Jul 30, 2025

Your morning cups of coffee and tea could be associated with lower risk of stroke and dementia

Your morning cups of coffee and tea could be associated with lower risk of stroke and dementia

The cup of coffee or tea you reach for in the morning -- OK, maybe it's a few -- may be associated with a lower risk for stroke and dementia, according to a new study.

Among more than 360,000 participants studied over a period of 10 to 14 years, those who drank 2 to 3 cups of coffee, 3 to 5 cups of tea, or a combination of 4 to 6 cups of coffee or tea a day had the lowest risk of stroke and dementia, according to researchers from Tianjin Medical University in Tianjin, China.

"Our findings suggested that moderate consumption of coffee and tea separately or in combination were associated with lower risk of stroke and dementia," the authors of the study said in a release.

Around the world, 10% of deaths are caused by stroke, according to a 2017 study published in The Lancet. Dementia refers to a general decline in brain function, but it can set in after a stroke.

Drinking coffee or tea alone also was associated with lower risk for both conditions, but people who had 2 to 3 cups of coffee and 2 to 3 cups of tea daily -- 4 to 6 cups total -- faired the best, with a 28% lower risk of dementia and 32% lower risk of stroke than those who didn't drink either, according to the study.

The participants' information came from the UK Biobank, a database of anonymous health information from around half a million volunteers in the United Kingdom gathered between 2006 and 2020. The study looked at health participants between ages 50 and 74 who self-reported their consumption of coffee and tea.

Over the course of the study period, 5,079 participants developed dementia and 10,053 experienced at least one stroke, according to the study, which was published in PLOS Medicine.

There have been many studies suggesting health benefits may be associated with drinking coffee and tea, but it is important to note that the researchers could only say the two were linked -- not that the beverages necessarily offered protection.

There are limitations to the accuracy of the data because the participants reported their own tea and coffee drinking, and their estimates could be influenced by their own bias, Dr. Lee H. Schwamm, chair of the American Stroke Association Advisory Committee and chair in Vascular Neurology at Massachusetts General Hospital, said via email.

"We cannot impute causality, and say 'drinking more coffee or tea is good for your brain.' What we can only say is that in this study, people who reported moderate coffee/tea drinking were less likely to have a stroke or dementia occur in the 10 years of follow-up," Schwamm said.

Is it time to start drinking coffee?


Past research has suggested that coffee may be beneficial to brain health.

Another 2021 study that utilized the UK Biobank showed that for people with no diagnosis of heart disease, regular coffee consumption of 0.5 to 3 cups of coffee a day was associated with a decreased risk of death from heart disease, stroke and early death from any cause when compared to non-coffee drinkers.

Several studies have also shown that three cups of coffee a day can decrease the risk for Alzheimer's Disease.

Caffeinated coffee can help the brain in several ways by increases production of granulocyte-colony stimulating factor, according to the UK Alzheimer's
Society. Called G-CSF, it helps protect and repair neural brain cells.

Neither decaffeinated coffee nor caffeine alone was shown to help in this way, "suggesting that there could be a combination effect between caffeine and an unknown compound in coffee," the society said.

More is not always better when it comes to coffee. People drinking more than 6 cups a day were at an increased risk of dementia and smaller total brain volumes, according to a study published in June in the journal Nutritional Neuroscience.

The results of the most recent study may point to some benefits of drinking coffee and tea, but that doesn't necessarily mean that everyone should start to brew more cups across the day.

Sign up for CNN's Stress, But Less newsletter. Our six-part guide will inform and inspire you to reduce stress while learning how to harness it.

"A word of caution, one man's cappuccino is another man's expresso," Schwamm said. "Not all coffee beverages have the same amount of caffeine, and people estimate a cup's worth of coffee or tea differently, so we should keep in mind that most things are best consumed in moderation."

If you avoided caffeinated beverages in the past, there may have been a good reason, and there isn't evidence yet that there is a benefit to starting a coffee or tea habit, he added. For most things, moderation is the best approach, Schwamm said.

"Enjoy your morning cup of coffee, and don't swear off additional cups if you enjoy them," he concluded.

Newsletter

Related Articles

0:00
0:00
Close
Former Judge Charged After Drunk Driving Crash Kills Comedian in Brazil
Jeff Bezos hasn’t paid a dollar in taxes for decades. He makes billions and pays $0 in taxes, LEGALLY
China Increases Use of Exit Bans Amid Rising U.S. Tensions
IMF Upgrades Global Growth Forecast as Weaker Dollar Supports Outlook
Procter & Gamble to Raise U.S. Prices to Offset One‑Billion‑Dollar Tariff Cost
House Republicans Move to Defund OECD Over Global Tax Dispute
Botswana Seeks Controlling Stake in De Beers as Anglo American Prepares Exit
Trump Administration Proposes Repeal of Obama‑Era Endangerment Finding, Dismantling Regulatory Basis for CO₂ Emissions Limits
France Opens Criminal Investigation into X Over Algorithm Manipulation Allegations
A family has been arrested in the UK for displaying the British flag
Mel Gibson refuses to work with Robert De Niro, saying, "Keep that woke clown away from me."
Trump Steamrolls EU in Landmark Trade Win: US–EU Trade Deal Imposes 15% Tariff on European Imports
ChatGPT CEO Sam Altman says people share personal info with ChatGPT but don’t know chats can be used as court evidence in legal cases.
The British propaganda channel BBC News lies again.
Deputy attorney general's second day of meeting with Ghislaine Maxwell has concluded
Controversial March in Switzerland Features Men Dressed in Nazi Uniforms
Politics is a good business: Barack Obama’s Reported Net Worth Growth, 1990–2025
Thai Civilian Death Toll Rises to 12 in Cambodian Cross-Border Attacks
TSUNAMI: Trump Just Crossed the Rubicon—And There’s No Turning Back
Over 120 Criminal Cases Dismissed in Boston Amid Public Defender Shortage
UN's Top Court Declares Environmental Protection a Legal Obligation Under International Law
"Crazy Thing": OpenAI's Sam Altman Warns Of AI Voice Fraud Crisis In Banking
The Podcaster Who Accidentally Revealed He Earns Over $10 Million a Year
Trump Announces $550 Billion Japanese Investment and New Trade Agreements with Indonesia and the Philippines
US Treasury Secretary Calls for Institutional Review of Federal Reserve Amid AI‑Driven Growth Expectations
UK Government Considers Dropping Demand for Apple Encryption Backdoor
Severe Flooding in South Korea Claims Lives Amid Ongoing Rescue Operations
Japanese Man Discovers Family Connection Through DNA Testing After Decades of Separation
Russia Signals Openness to Ukraine Peace Talks Amid Escalating Drone Warfare
Switzerland Implements Ban on Mammography Screening
Japanese Prime Minister Vows to Stay After Coalition Loses Upper House Majority
Pogacar Extends Dominance with Stage Fifteen Triumph at Tour de France
CEO Resigns Amid Controversy Over Relationship with HR Executive
Man Dies After Being Pulled Into MRI Machine Due to Metal Chain in New York Clinic
NVIDIA Achieves $4 Trillion Valuation Amid AI Demand
US Revokes Visas of Brazilian Corrupted Judges Amid Fake Bolsonaro Investigation
U.S. Congress Approves Rescissions Act Cutting Federal Funding for NPR and PBS
North Korea Restricts Foreign Tourist Access to New Seaside Resort
Brazil's Supreme Court Imposes Radical Restrictions on Former President Bolsonaro
Centrist Criticism of von der Leyen Resurfaces as she Survives EU Confidence Vote
Judge Criticizes DOJ Over Secrecy in Dropping Charges Against Gang Leader
Apple Closes $16.5 Billion Tax Dispute With Ireland
Von der Leyen Faces Setback Over €2 Trillion EU Budget Proposal
UK and Germany Collaborate on Global Military Equipment Sales
Trump Plans Over 10% Tariffs on African and Caribbean Nations
Flying Taxi CEO Reclaims Billionaire Status After Stock Surge
Epstein Files Deepen Republican Party Divide
Zuckerberg Faces $8 Billion Privacy Lawsuit From Meta Shareholders
FIFA Pressured to Rethink World Cup Calendar Due to Climate Change
SpaceX Nears $400 Billion Valuation With New Share Sale
×