Sleep changes as we age. When we were kids, we needed 10 to 12 hours of sleep, for teens it is eight to 10 and it decreases to seven to nine as we reach adulthood. But there is always a lack of urgency when it comes to sleep and young adults, many of whom prefer staying up and doing different activities. According to the Centre of Disease Control and Prevention, many national surveys show that about 37% of men, and 39% of people from the age of 45 to 64 reported not getting enough sleep.

Many people in America don't sleep the right amount. This means they either sleep too long or not long enough. But what happens to your body when you do not sleep enough? You just feel tired right? No, when you don't get this much sleep, your body can get stressed. This can make you more likely to get sick. A study published by the JAMA Network Open Sleep Trajectories and All-Cause Mortality Among Low-Income Adults showed that people who don't sleep the right amount have a higher chance of dying early. It's like your body needs that time to rest and fix itself. Without enough good sleep, things can start to go wrong. So, getting the right amount of sleep is super important for staying healthy.

How Was The Study Done?

Scientists wanted to see how sleep habits affect people's health over many years. They looked at almost 47,000 people who were between 40 and 79 years old. They asked them about their sleep habits when the study started, and then again, a few years later. The scientists wanted to see if people's sleep habits changed. They divided people into groups based on if they started with too much or too little sleep, and if their sleep changed over time. For example, some people started sleeping a lot but then started sleeping very little. This helped the scientists see how different sleep patterns affected people's health. They wanted to see the long-term effects of sleep.

The study found that people who had sleep habits that changed a lot had a higher risk of dying early. This means if you started sleeping too much and then switched to sleeping too little, or the other way around, you were more likely to die sooner. They also found that these people had a higher risk of heart problems. The risks were even higher for some groups of people, like white adults and people with higher incomes.

Sleep Deprivation And Its Effect On The Body

If you often doze off when you are sitting and reading, watching a movie, talking to someone, sitting quietly after lunch or even during a few minutes of traffic, you may be sleep deprived according to the National Heart, Lung, and Blood Institute. They explain how sleep deprivation can cause issues with learning, focusing and reacting to certain things. The symptoms of sleep deprivation in kids differ a little as they might be overly active and have trouble paying attention to certain things. If you are experiencing sleep issues, make sure to speak to a healthcare professional who will help you identify the issues and direct you towards the treatment or changes you must make. Here are some ways sleep helps your body.

Repairs Your Heart

Good sleep allows your heart and blood vessels to heal. This keeps them strong and healthy, reducing the risk of heart problems.

Controls Hunger

Sleep helps balance your hunger hormones, so you don't feel too hungry. This helps prevent eating too much and keeps your weight healthy.

Manages Blood Sugar

Proper sleep helps your body use insulin correctly. This lowers the chance of high blood sugar, which can lead to diabetes.

Supports Growth

Deep sleep releases growth hormones, helping kids and teens grow. It also repairs body tissues, which is important for everyone.

Boosts Immunity

When you sleep well, your body's defense system gets stronger. This helps you fight off germs and stay healthy.

Keeping your cholesterol levels in a healthy range is one of the best things you can do for your heart. High cholesterol is a major risk factor for heart disease, but the good news is that what you eat can make a significant difference. While some people may need medication, research shows that certain foods can naturally help lower LDL cholesterol and support overall cardiovascular health.

One of the easiest places to start is with oats. Oats are packed with a soluble fiber called beta-glucan, which helps reduce the amount of cholesterol absorbed into your bloodstream. A review published in Nutrients found that regularly eating oat beta-glucan can lead to meaningful reductions in LDL cholesterol, especially when combined with an overall heart-healthy diet.

Legumes such as beans, lentils, and chickpeas are another powerful addition to your plate. They're rich in fiber and plant-based protein, making them an excellent alternative to processed meats and other foods high in saturated fat. Research has consistently linked regular legume consumption with lower LDL cholesterol levels and better heart health.

Nuts also deserve a place in a cholesterol-friendly diet. Almonds, walnuts, and other tree nuts provide healthy unsaturated fats, fiber, and antioxidants. According to studies published in the American Journal of Clinical Nutrition, moderate nut consumption can help improve cholesterol levels and support cardiovascular health.

Fatty fish like salmon, sardines, and mackerel are well known for their heart-protective benefits. These fish are rich in omega-3 fatty acids, which can help lower triglycerides and support healthy blood vessels. The American Heart Association recommends eating fatty fish at least twice a week as part of a balanced diet.

Fruits and vegetables remain some of the most important foods for maintaining healthy cholesterol levels. Apples, berries, oranges, leafy greens, and broccoli provide fiber, vitamins, antioxidants, and plant compounds that help protect the heart. Numerous studies have shown that diets rich in fruits and vegetables are associated with a lower risk of cardiovascular disease.

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Avocados are another heart-smart choice. They contain monounsaturated fats and fiber, both of which can help improve cholesterol levels when used in place of foods high in saturated fat. A clinical study published in the Journal of the American Heart Association found that people who ate one avocado daily experienced greater reductions in LDL cholesterol than those following similar diets without avocado.

The bottom line is that controlling cholesterol doesn't require a drastic diet overhaul. Small, consistent changes—such as eating more whole grains, legumes, nuts, fruits, vegetables, fatty fish, and healthy fats—can have a lasting impact on heart health. Combined with regular exercise and other healthy lifestyle habits, these foods can help keep your cholesterol in check and support long-term well-being.

Sleep is one of the most important factors for overall health and well-being, influencing both physical and mental health. Yet, how much sleep a person actually needs remains a common topic of debate.

Dr Sudhir Kumar, a neurologist at Apollo Hospitals, addressed several misconceptions and shared evidence-based insights about sleep that everyone should know.

In a detailed post on social media platform X, Dr Sudhir said that most adults need 7–9 hours of sleep per night.

While some may function well with slightly less or more sleep, he noted that "regularly sleeping less than six hours or more than 9–10 hours is associated with adverse health outcomes."

Sleep Consistency Matters Too

While sleep duration is important, sleep consistency is equally important.

"Going to bed and waking up at roughly the same time every day helps regulate your circadian rhythm," he said.

Irregular sleep schedules, on the other hand, are associated with poorer metabolic health, mood disturbances, and daytime sleepiness.

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Monophasic vs Biphasic Sleep

Dr Sudhir said that most modern adults follow a monophasic pattern, with one main sleep period at night.

However, "a biphasic pattern (night sleep plus a short afternoon nap) can also be healthy if total sleep duration is adequate and the nap does not interfere with nighttime sleep."

Does Everyone Need an Afternoon Nap?

Not necessarily, said Dr Sudhir, popularly known as Hyderabaddoc on X, adding that many healthy adults do perfectly well without naps.

However, naps may be particularly useful for:

• Shift workers

• People with sleep debt

• Older adults with increased daytime sleepiness

• Those performing safety-critical tasks requiring sustained alertness

Further, he said that a 10–30-minute nap, also known as a power nap, is usually best, and may help:

• Improve alertness

• Improve concentration

• Reduce fatigue

• Enhance performance

However, naps lasting more than an hour may cause "sleep inertia" (grogginess) and disrupt nighttime sleep in some individuals.

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Night Shift Work And Health Impacts

"Night shift work is not biologically normal," Dr Sudhir said.

Humans are programmed to be awake during the day and asleep at night. Long-term night shift work has been associated with increased risks of:

• Obesity

• Type 2 diabetes

• Cardiovascular disease

• Mood disorders

• Workplace accidents

Sleep During Weekends

Dr Sudhir also addressed the common belief that people can make up for lost sleep during weekends.

While "partial recovery is possible," he said weekend catch-up sleep does not fully reverse the effects of chronic sleep deprivation.

Large shifts in sleep timing during weekends, often referred to as "social jet lag," can disrupt circadian rhythms.

He advised keeping wake-up and bedtime within about one to two hours of the weekday schedule.

He also warned against relying on multiple alarms every morning, which according to him "suggests insufficient sleep, poor sleep quality, and circadian misalignment."

How Inadequate Sleep Can Affect You

Dr Sudhir said regularly sleeping more than 9–10 hours may be associated with higher risks of cardiovascular disease, depression, frailty, and mortality.

At the same time, the neurologist noted that "even one night of inadequate sleep can impair performance".

Short-term sleep deprivation can lead to:

• Reduced attention

• Slower reaction time

• Poor decision-making

• Mood changes

• Increased accident risk

Chronic insufficient sleep is associated with:

• Hypertension

• Type 2 diabetes

• Obesity

• Cardiovascular disease

• Depression and anxiety

• Cognitive decline

• Reduced quality of life

"Sleep is a fundamental biological requirement, just like nutrition and exercise," Dr Sudhir said.

GLP-1 receptor agonists (GLP-1 RAs), including semaglutide widely used to improve diabetes control and promote weight loss, may also reduce the risk of colorectal cancer, according to a new study.

The study found that the effect was particularly notable among people with inflammatory bowel disease (IBD), as well as those with both IBD and type 2 diabetes. Both conditions are associated with a higher risk of colorectal cancer due to chronic inflammation and metabolic changes that may promote tumor development.

"GLP-1 RA use was associated with a significantly reduced incidence of colorectal cancer in all patients with IBD, as well as the subpopulation with both IBD and type 2 diabetes," said lead author Sarina Ailawadi of Case Western Reserve University, US.

"Given the elevated colorectal cancer risk in IBD, these findings suggest a potential protective effect of GLP-1 RA use in this high-risk population. Prospective studies will be important to further analyze and confirm this potential benefit," she added.

The findings will be presented at the 2026 American Society of Clinical Oncology (ASCO) Breakthrough meeting, scheduled for June 25–27 in Singapore.

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How Was The Study Conducted?

This retrospective cohort study analyzed data from 69,221 people in the US, including GLP-1 RA users and non-users.

Researchers also identified 209,649 people with both IBD and type 2 diabetes, including 38,567 who had taken a GLP-1 RA.

After matching users and non-users for various characteristics, data from 37,740 patients were analyzed. The GLP-1 RA group included people taking semaglutide, dulaglutide, tirzepatide, exenatide, liraglutide, or lixisenatide.

The researchers compared the five-year incidence of colorectal cancer between GLP-1 RA users and non-users.

Among people with IBD, the five-year incidence of colorectal cancer was 0.2% in GLP-1 RA users compared with 0.42% in non-users. The odds ratio was 0.49, indicating a 51% lower likelihood of developing colorectal cancer among GLP-1 RA users.

Among patients with both IBD and type 2 diabetes, the five-year incidence of colorectal cancer was 0.31% in GLP-1 RA users and 0.57% in non-users. The odds ratio was 0.54, suggesting a 46% lower likelihood of developing colorectal cancer.

The researchers noted that prospective studies are needed to confirm the potential protective effect of GLP-1 RAs on colorectal cancer risk.

Do IBD and Type 2 Diabetes Increase Colorectal Cancer Risk?

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Inflammatory bowel disease is associated with a higher risk of colorectal cancer, likely because of chronic inflammation in the intestines. People with IBD are estimated to be six times more likely to develop colorectal cancer than those without the condition.

Type 2 diabetes, the most common form of diabetes, also increases colorectal cancer risk and is becoming more common among people with IBD. Scientists believe that individuals with both conditions may face an especially high risk because of the combined effects of chronic inflammation and metabolic dysfunction.

What Are GLP-1 Receptor Agonists?

GLP-1 receptor agonists are a class of drugs that help lower blood sugar levels and promote weight loss. Originally developed to treat type 2 diabetes, many are now widely used for weight management.

These medications mimic the action of the GLP-1 hormone by stimulating insulin release, slowing digestion, and increasing feelings of fullness.

Beyond blood sugar control and weight loss, GLP-1 RAs have been linked to several health benefits, including lower blood pressure and reduced cardiovascular risk. Previous studies have also suggested that they may lower the risk of colorectal cancer and other obesity-related cancers.

However, their specific impact on colorectal cancer risk among people with IBD has remained unclear until now.