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.
Credit: Unsplash
Often, we underestimate the way our brain works and daydreaming has long been seen as a major sign of creativity. Many artists have used their imagination to bring their work to life. However, science offers a different perspective.
Coined in 2002 Dr. Eliezer Somer, those who experience “maladaptive daydreaming” often fantasize about celebrities, historical figures or idealized versions of themselves. Their imaginations are more elaborate, diverse, and complex as compared to other daydreamers.
A 2012 Consciousness and Cognition study found that maladaptive daydreamers spend, on average, 57 percent of their waking hours daydreaming far more than their counterparts.
Dr Somer explains: "The greatest difference is the maladaptive daydreamers reported that the activity interfered with their daily life. They also reported higher rates of attention-deficit and obsessive compulsive symptoms, and more than 80% used kinesthetic activity or movement when daydreaming, such as rocking, pacing or spinning"
He further noted that while everyone experiences moments of mind-wandering, it usually does not interfere with daily life. But maladaptive daydreaming does interfere in regular life. The condition has not been classified as a mental illness and there is no treatment for it yet.
Many Reddit users have shared their experiences with maladaptive daydreaming, often asking questions such as: “Is it normal to daydream for such long hours?”
While some responses described daydreaming as a form of dissociation when bored, others relied on music or movies to fuel fantasies of being a “better version” of themselves, often struggling to return to reality.
Here are some early signs of maladaptive daydreaming to keep an eye out for:
Rachel Bennett, a member of Dr. Somer’s online community, shared she usually dreams up new episodes of her favorite Japanese animé characters and TV shows. She’s also created four families of fictional characters which have grown with her over the years.
“I’d much rather stay home and daydream than go out,” she said.
Dr. Somer noted that about one-quarter of maladaptive daydreamers are trauma survivors who use daydreaming as an escape. Many report family members with similar tendencies, as well as being shy or socially isolated.
Meanwhile, a Harvard Medical study found that 80 percent of maladaptive daydreamers have ADHD, followed by anxiety disorders, depression, and OCD. Researchers believe daydreaming often acts as a coping mechanism for pent-up emotions that cannot be expressed in real life, so they are released through imagination instead.
Experts emphasize that maladaptive daydreaming is not an extreme condition requiring formal diagnosis, but many people have shared strategies that help:
Credits: Canva
A new review published in The Lancet highlights how close this shift may be. The study underscores a hard truth: despite having effective medicines for years, global blood pressure control remains disappointingly poor. The real challenge, experts say, is not the absence of drugs—but problems with adherence, health systems, and long-term patient engagement.
Hypertension continues to be the leading cause of heart attacks, strokes and premature deaths worldwide. The World Health Organization (WHO) defines high blood pressure as readings at or above 140 mm Hg systolic and/or 90 mm Hg diastolic. A normal reading is below 120/80 mm Hg.
The numbers are staggering. Between 2024 and 2025, an estimated 1.4 billion adults aged 30 to 79—roughly one in three people in this age group—are living with hypertension globally. Nearly 44 percent do not even know they have it. Among those diagnosed, fewer than one in four have their blood pressure adequately controlled.
India reflects this alarming trend. The ICMR-INDIAB study (2023) estimated that about 315 million Indians—35.5 percent of the population—have hypertension. Data from NFHS-5 further showed that nearly half of hypertensive men and more than a third of hypertensive women in India do not have their condition under control.
For decades, hypertension treatment has relied on daily oral medications—often combinations of two or more drugs. These may include ACE inhibitors, angiotensin receptor blockers paired with calcium channel blockers, and thiazide diuretics.
On paper, these regimens are effective. In reality, adherence is the weak link.
Many patients with hypertension also manage diabetes, obesity or high cholesterol. The result is polypharmacy—multiple pills, multiple times a day. Over time, missed doses, side effects and simple “treatment fatigue” erode consistency. Therapeutic inertia—where doctors do not intensify treatment despite poor control—further worsens outcomes.
This is where long-acting injectable therapies come in. According to Dr Mohit Gupta, cardiologist at G B Pant Hospital and UCMS, the field is now moving toward therapies that may be administered just twice a year.
Unlike traditional medicines that work downstream to reduce blood pressure numbers, these new drugs target upstream molecular pathways that drive hypertension.
One promising approach involves small interfering RNA (siRNA) therapies that inhibit angiotensinogen production in the liver. By silencing this protein, they dampen the renin–angiotensin system—central to blood pressure regulation. Zilebesiran, developed by Roche and Alnylam, is currently in global phase 3 trials.
Another candidate, ziltivekimab by Novo Nordisk, targets inflammatory pathways increasingly linked to cardiovascular risk. There are also newer strategies aimed at selectively modulating aldosterone, a hormone that increases blood volume and pressure.
The appeal is simple: durability. A twice-yearly injection could eliminate the daily burden of pill-taking, improve adherence and provide more stable blood pressure control over time.
However, excitement is tempered by concern. Cost remains a major question. The recent introduction of inclisiran, an injectable cholesterol-lowering therapy priced between Rs 1.8 and 2.4 lakh annually in India, highlights affordability challenges.
Long-term safety is another critical issue. Hypertension is lifelong. Patients may require these treatments for decades. Experts stress the need for robust long-term data across diverse populations before widespread adoption.
The promise is undeniable. A twice-yearly injection that reliably controls blood pressure could transform preventive cardiology. But its true impact will depend not only on scientific success—but on accessibility, affordability and sustained safety.
Credits: iStock
Testosterone prescription in the UK have surged in recent years. Reels and TikTok videos with medical practitioner talking about testosterone shots, how to take it, and the do's and dont's are easily found on social media platform. Many doctors, patients and private clinics are debating on whether the hormone is genuine treatment for low libido or just a wellness trend.
As per the NHS Business Authority data compiled by the Care Quality Commission and reported by the BBC, testosterone prescriptions increased by 135 per cent between 2021 and 2024. This spike comes when people in Britain are also having less sex than the previous generation, noted a BBC report. This has raised an important question. Are hormones the missing link or are there deeper social changes at play?
In the 1990s, Alan Reeves performed in front of thousands as part of the male dance troupe Dreamboys and even appeared in the Spice Girls film Spice World. But in his thirties, his energy dipped and his libido faded.
“I just didn't feel right,” Reeves told the BBC.
Now 52 and working as a fitness and lifestyle coach in London, he began testosterone replacement therapy, or TRT, and says the difference was dramatic. He described feeling transformed from “a grumpy old man” to someone who felt decades younger.
His relationship had been struggling before treatment. “We were going without sex for three, four months at a time. I just wasn't interested,” he said in the BBC report, adding that such changes can damage relationships.
Women are increasingly seeking treatment too. Menopause blogger Rachel Mason told the BBC the hormone was “amazing” for her concentration, energy and libido.
There is a broader trend in the rise of prescribed testosterone. The long running National Surveys of Sexual Attitudes and Lifestyles documented a steady decline in sexual frequency over decades. People aged 16 to 44 reported sex about five times a month in 1990, by 2010, the number had dropped to three times. Researchers further predict a downward trend to continue.
Soazing Clifton, academic director of the survey, told the BBC that the fall appears across almost every demographic, including couples living together.
“No data we have so far can really tell us with any confidence why, as a population, we are no longer having sex as much,” she said.
Experts point to multiple factors. GP and sex therapist Dr Ben Davis said modern pressures play a role. Stress, loneliness, depression and constant digital distraction all reduce desire.
Another explanation is biological. Consultant urologist Professor Geoffrey Hackett told the BBC testosterone levels in men are declining, partly linked to obesity, diabetes and sedentary lifestyles. Lower hormone levels increase the likelihood of low libido, though not everyone with low testosterone experiences sexual problems.
For some patients, the results feel life changing.
Melissa Green, 43, said the treatment “gave me my life back” and improved both energy and intimacy in her marriage after she sought help from a private clinic, according to the BBC.
But not everyone benefits. Cheryl O’Malley stopped taking testosterone after a year due to intense anger and excessive sexual arousal. “I felt out of control,” she said in the BBC report.
Doctors note that side effects can include acne, hair growth and weight gain in women, and mood swings, infertility and prolonged erections in men.
The growing demand has fuelled a booming private clinic market. Some NHS clinicians are concerned.
Dr Paula Briggs described it to the BBC as a “gravy train”, saying patients may pay for treatments they do not need and warning that advertising has “blown everything out of proportion”.
Private providers disagree. GP Jeff Foster told the BBC the private sector is filling a care gap because the NHS lacks capacity to diagnose large numbers of men who may have low testosterone.
Guidelines also differ. Some professional bodies recommend treatment below 12 nmol per litre while NHS thresholds can be lower, leading some patients to seek private prescriptions after being refused treatment publicly.
Despite its popularity, doctors caution that TRT is not a universal fix.
“For some, medication can be really transformative,” Davis told the BBC. “But there are so many factors that play into a low libido and testosterone is not the only answer.”
Even Reeves agrees. After seven years on therapy, he says lifestyle changes matter just as much.
Otherwise, he said, taking testosterone alone is like installing a Ferrari engine in a worn out car.
As prescriptions continue to rise, the debate reflects a broader question about modern health. Is declining desire a medical problem, a social shift, or a mix of both? The answer may determine whether testosterone therapy becomes mainstream medicine or remains a controversial shortcut to vitality.
© 2024 Bennett, Coleman & Company Limited