Irregular Sleep, Drinking Caffeine After 3PM Could Raise Your Risk Of Heart Attack And Stroke
I’ve always struggled with inconsistent sleep, staying up late and waking up at different times each day. My love for coffee was also on an all-time high with trying all the season specials. But it is only recently, I learned how this irregular sleep pattern and caffeine could increase my risk of heart attack and stroke. Now, I’m prioritizing a consistent sleep schedule and cutting out caffeine after 3 PM to protect my heart.
A new, shocking study shows that irregular sleep patterns can greatly increase the risk of heart attack and stroke. But that's not all: the timing of your caffeine intake could also play a critical role in your cardiovascular health. If you are struggling with inconsistent sleep patterns and regularly sipping on caffeinated beverages late in the day, you may be unknowingly putting yourself at risk for serious heart-related issues.
For most people, sleep is something of a given and we often only consider ourselves as long as we get our required seven to nine hours. However, according to a recent study conducted by researchers at the Children's Hospital of Eastern Ontario, it may not be that long after all. The study, which included more than 72,000 participants, found that people with irregular sleep patterns—those who fall asleep and wake up at vastly different times each day—face a 26% higher risk of experiencing a heart attack or stroke. This increased risk persisted even for those who managed to get enough sleep. The study followed up participants for eight years to track heart events such as heart attacks, strokes, and heart failure. The conclusions were clear: irregular sleep, even if it's sufficient in duration, is a major cardiovascular risk factor.
The researchers found that those whose sleep patterns were highly irregular had a significantly greater chance of life-threatening heart issues. The more erratic your sleep schedule, the greater the risk, regardless of how many hours you sleep. In fact, people with irregular sleep schedules showed worse cardiovascular health outcomes, including higher rates of high blood pressure, elevated stress hormones, and poor blood sugar and cholesterol management.
Senior scientist Dr. Jean-Philippe Chaput said "sleep regularity may be more relevant than sufficient sleep duration in modulating MACE [major adverse cardiovascular event] risk." In the study, it shows that our bodies are comfortable with consistency, and a varied sleep schedule may interfere with other processes that keep us healthy, especially the heart.
Another daily habit that may be putting your heart at risk is caffeine consumption after 3 PM. According to Dr. Chaput, the experts emphasize the need for a healthy sleep schedule and avoiding caffeine late in the day. Caffeine can stay in your blood for up to eight hours, and its consumption later in the afternoon can disrupt your sleep cycle.
Consistent, good-quality sleep is necessary for maintaining healthy cardiovascular function, and the disruption of this by late-day caffeine intake exacerbates the risks posed by irregular sleep. When you drink coffee, tea, or other caffeinated beverages too late, the stimulant effect on your nervous system makes it harder to fall asleep at a regular time. This can lead to inconsistent sleep patterns, which, as we have seen, can be harmful to heart health.
Dr Chaput insists that humans need to adopt practices that contribute to regularized sleep habits. This can be attained by establishing a proper sleeping and waking schedule, eliminating afternoon intake of stimulants such as caffeine, and making your body clock coincide with the lifestyle one leads.
According to the experts, the disturbance due to irregular sleep patterns impacts more than one physiological process involved in the maintenance of the healthy heart. For example, poor sleep can be associated with increased inflammation of the body, weakened immunity, and altered regulation of blood sugar and cholesterol, all of which contribute to increased blood pressure and weakening endothelial function, both associated with an increased risk for cardiovascular diseases. Sleep also plays a very important role in regulating stress hormones. Poor or disturbed sleep results in increased levels of cortisol, the stress hormone, which increases blood pressure and can have negative impacts on cardiovascular health over time.
Scientists hypothesize that these disturbances trigger a series of negative effects that enhance the risk of developing chronic heart conditions, including hypertension, atherosclerosis, or even heart failure.
In order to protect your heart, experts recommend several proactive measures to improve your sleep patterns and lifestyle. First, maintain a regular sleep schedule whereby you go to bed and wake up at the same time every day, including weekends. Consistency will keep your body's internal clock in check.
Along with regulating your sleep, paying attention to your caffeine habits is just as important. To reduce your risk of heart disease and stroke, experts suggest avoiding caffeine after 3 PM. If you’re sensitive to caffeine, this rule becomes even more critical.
In addition, the introduction of stress-reducing activities like yoga or mindfulness can also be beneficial to lower cortisol levels, and therefore both sleep and heart health can improve. A diet rich in antioxidants, healthy fats, and low on processed sugars also helps maintain cholesterol levels and reduce inflammation.
Apart from the timing of caffeine and your sleep schedule, another very overlooked factor is the quality of your sleep environment. Scientists have long known that the environment in which you sleep has a huge impact on the quality of your rest. Poor quality of sleep, even if your sleep schedule is regular, can cause health risks that are very much the same as those that arise from irregular sleep patterns.
Here’s an additional tip: make sure your bedroom is conducive to restful sleep. This means keeping your room dark, quiet, and cool. A temperature of around 65°F (18°C) is ideal for most people. Consider investing in a comfortable mattress and pillows, and avoid screen time at least 30 minutes before bed to allow your brain to unwind.
Irregular sleep, in association with taking caffeine in late parts of the day, can risk heart attack and stroke, but a simple maintenance of a sleep schedule, the reduction of consumption of afternoon caffeine, and sleep environmental awareness can definitely safeguard one's heart along with total health.
Your sleep is more than just a time for rest; it's a vital component of your long-term health, and maintaining consistency in your sleep habits is one of the best things you can do for your heart.
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One in four or 25 percent of adults with type-2 diabetes in India also suffer from liver fibrosis, according to an alarming study published in The Lancet Regional Health Southeast Asia journal today.
With data from more than 9,000 patients across the country, it is the largest ever real-world survey of liver fibrosis in type 2 diabetes from any low- or middle-income country.
While fatty liver disease has been touted as the most common liver condition among diabetes patients, the new study established liver fibrosis as the real danger among people with high blood sugar.
“Type 2 diabetes is closely linked to fatty liver disease (also known as MASLD). But how common is liver Fibrosis — the real danger — in Indian diabetics? Our answer: 1 in 4 has clinically significant liver fibrosis. One in 20 already has probable cirrhosis. Most had no symptoms. We propose liver fibrosis as the ‘4th major complication’ of diabetes,” said Ashish Kumar, from Ganga Ram Postgraduate Institute of Medical Education and Research (GRIPMER), from Sir Ganga Ram Hospital, in a post on social media platform X.
What Did The Study Find?
Fatty liver is typically the first and reversible stage of liver disease, where excess fat builds up in liver cells. Left untreated, it progresses to liver fibrosis, which is the excessive accumulation of scar tissue (collagen) in the liver resulting from chronic inflammation. The condition then progresses to the third and late stage, irreversible scarring (fibrosis) of the liver. The final stage is liver cancer.
The DiaFib-Liver Study included a total of 9,202 adults with type-2 diabetes patients who underwent FibroScan (VCTE) to assess liver fibrosis in routine diabetes care.
Of these:
The study suggested the urgent need to integrate fibrosis screening into national diabetes programs.
“One in four adults with type 2 diabetes in India has clinically significant liver fibrosis and one in twenty already has probable cirrhosis, establishing advanced liver disease as a 'fourth major complication' of diabetes,” said the researchers.
“The DiaFibLiver Study calls for: Fibrosis — not steatosis — as the screening target. FibroScan integration into routine diabetes care. Moving beyond ultrasound-based referral,” Jha said.
“We hope this data from India adds to the global conversation on diabetes and liver disease,” he added.
Also read: The Silent Rise of Fatty Liver Disease: How India-Specific Guidelines Can Help
The findings highlight the urgent need to:
Certain lifestyle choices can accelerate liver damage, such as:
Overeating processed or fried foods
High sugar intake (soft drinks, sweets, desserts)
Physical inactivity or prolonged sitting
Ignoring health issues like diabetes or hypertension
Crash dieting or taking unprescribed supplements.
Early screening and detection are key to prevent irreversible stages. Yet liver disease can be prevented with lifestyle changes such as:
Taking too many decisions in a day can lead to mental exhaustion. (Photo credit: iStock)
New Delhi: Every day, the brain processes hundreds of choices. Most pass unnoticed: what to wear, which route to take, what to eat. But accumulated over hours and across competing demands, this constant decision-making exacts a cost. Decision fatigue is the gradual erosion of the brain’s capacity to make good choices, and over time it affects both mental functioning and physical health. Dr Shivi Kataria, Consultant – Psychiatry, CK Birla Hospitals, Jaipur, addressed the problem of plenty and said that it could take a toll on mental health in certain circumstances.
Read more: India Launches 1st Repository Of Data On Major Psychiatric Disorders
What are the signs?
The earliest signs tend to be emotional. Simple decisions start to feel disproportionately heavy. Choosing between two options takes longer than it should. Irritability surfaces. Tasks that once felt manageable begin to pile up as the mental energy required to engage with them thins. Procrastination, self-doubt, and a general withdrawal from decisions are common responses, with the brain essentially rationing what little capacity remains.
Cognitive symptoms follow. Concentration narrows. Judgement becomes less reliable. Small errors accumulate. People in this state often describe feeling mentally stuck, present in the room but unable to engage with any clarity or momentum.
The physical dimension is frequently overlooked. Headaches, low energy, disrupted sleep, and difficulty sustaining attention are all associated with sustained decision overload. These symptoms register what prolonged mental strain produces in the body and are worth taking seriously.

Who is most at risk?
Decision fatigue affects most people at some point, but the load is not evenly distributed. Professionals in high-responsibility roles, caregivers, and anyone managing multiple competing demands make a disproportionately high number of decisions each day. By the end of a long day, the quality of choices made about food, purchases, relationships, or work often reflects exhaustion more than intention.
Read more: Smartphone Overuse Linked To Rising Risk Of Eating Disorders Among Youth, Study Finds
Is there a solution?
Reducing the number of decisions that require active thought each day is the most direct intervention. Fixed routines for meals, schedules, and recurring tasks remove the need to deliberate repeatedly over the same ground. This is conservation of mental energy, and it compounds over time.
Important decisions are better made earlier in the day, when the brain is rested and cognitive resources are intact. Short breaks during sustained work periods allow partial recovery. Even brief physical activity or deliberate rest between decision-heavy tasks restores some capacity.
The brain has a finite decision-making budget each day. Spending it on low-stakes choices leaves less available for the ones that carry real consequence.
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While fevers are often overlooked and brushed aside or even managed with antibiotics — a dangerous trend — an alarmingly nationwide study linked it to infectious diseases with far-reaching consequences.
The report, based on data of over one lakh individuals in India with fever, between 2023 and 2025, showed that these were not vague or self-limiting, but in more than 30 percent or one-third cases had clear links to serious infections, such as dengue, and typhoid.
According to the report by healthcare diagnostics company Thyrocare, the fevers were mostly linked with
Importantly, the findings highlighted the presence of co-infections in 10 per cent cases. The most common was a combination of dengue and typhoid.
Dr Preet Kaur, Chief Scientific Officer, Thyrocare, said that a significant number of patients carry serious infections, sometimes more than one at a time, revealing patterns that simple assumptions cannot capture.
"Beyond the visible rise in temperature, laboratory markers highlight hidden stress on organs, from drops in platelet counts to elevated liver enzymes, underscoring that fever is a systemic signal, not an isolated event," she added.
Also read: ‘Breakbone Fever’: US CDC Warns Of Dengue Surge Across 17 Countries
Further, the report noted that dengue positivity declined significantly over the three-year report period, malaria increased despite its lower overall base.
Typhoid and chikungunya rose in 2024 before easing in 2025 but remained present across the testing population.
Also read: Drug Resistance Driving Severe Typhoid Disease, Death Among Children Under-5s in India: Lancet Study
The report noted that more women were affected with typhoid than men. On the contrary, men reported more malaria cases.
More than 32 percent of females had fevers compared to 29 percent of men. Fevers in women was largely driven by higher typhoid detection (21 percent vs 15 percent).
Malaria affected men more than twice as often as women (1.1 percent vs 0.5 percent).
The lab reports also revealed key physiological markers such as platelet counts and liver function among people with fever, dengue, and malaria.
Low platelet levels were seen in
Dengue cases rose throughout the year and typically peaked around October.
Typhoid positivity steadily fell from 2023 to its lowest in 2025. Despite a mild monsoon spike each year, 2025 remained consistently lower overall.
Chikungunya cases rose gradually from lower, volatile levels in 2023, peaked sharply in 2024, and moderated to a softer trend in 2025.
Malaria positivity remained relatively low overall but increased during the monsoon months, with transmission peaking between May and September.
Over the three-year period, malaria positivity rose from 0.5 percent to 1.1 percent, indicating a gradual increase despite its lower overall base.
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