Your body hosts trillions of bacteria, viruses, and fungi, collectively known as the microbiome. While some bacteria are linked to disease, many play essential roles in supporting your immune system, heart health, weight management, and overall well-being. This article delves into the significance of the gut microbiome and its impact on health.

What Is Gut Microbiome?

Interestingly, bacterial cells outnumber human cells in the body, with approximately 40 trillion bacterial cells compared to 30 trillion human cells. With up to 1,000 species of bacteria present in the gut, each plays a distinct role. While most bacteria contribute positively to health, some can be harmful. Together, these microbes weigh around 1–2 kilograms, functioning almost like an additional organ essential for overall well-being.

How Does Gut Microbiome Influence Your Health?

The relationship between humans and microbes has evolved over millions of years, with the gut microbiome playing a crucial role from birth. Initial exposure to microbes occurs during birth, and some evidence suggests that exposure begins in the womb. As the microbiome diversifies, it starts influencing key bodily functions:

Digestion of breast milk: Beneficial bacteria like Bifidobacteria help break down essential sugars in breast milk, supporting infant growth.

Fiber digestion: Some bacteria process fiber into short-chain fatty acids, which contribute to gut health and reduce risks of obesity, diabetes, and heart disease.

Immune system regulation: The gut microbiome interacts with immune cells, influencing how the body responds to infections.

Brain health: Emerging research suggests a link between the gut microbiome and brain function, potentially affecting mental health and neurological processes.

Gut Microbiome And Weight Management

An imbalance between beneficial and harmful microbes, known as gut dysbiosis, may contribute to weight gain. Studies on identical twins—one with obesity and the other without—suggest that microbiome composition plays a role in body weight independent of genetics. Additionally, animal studies indicate that gut bacteria can influence weight gain, even when calorie intake remains constant.

Probiotics, beneficial bacteria found in supplements and certain foods, can help restore gut balance and support weight loss, though their effects may be modest.

Gut Health And Disease Prevention

The gut microbiome plays a vital role in preventing and managing conditions like irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD). Imbalances in gut bacteria may lead to bloating, cramps, and digestive issues. On the other hand, beneficial bacteria like Bifidobacteria and Lactobacilli help strengthen the intestinal lining, reducing the risk of gut-related disorders.

Impact On Heart Health

Research suggests that the gut microbiome influences heart health by affecting cholesterol levels and blood pressure. Certain harmful bacteria produce trimethylamine N-oxide (TMAO), a compound linked to blocked arteries and heart disease. However, probiotics, particularly those containing Lactobacilli, may help reduce cholesterol levels and promote cardiovascular health.

Blood Sugar Regulation And Diabetes Risk

The gut microbiome also plays a role in regulating blood sugar levels. Research on infants genetically predisposed to type 1 diabetes indicates that gut microbiome diversity declines before disease onset. Furthermore, individual variations in gut bacteria may explain why people experience different blood sugar responses to the same foods.

Connection Between Gut And Brain

The gut is physically connected to the brain through nerves, and certain bacteria help produce neurotransmitters like serotonin, which influence mood and mental health. Studies indicate that people with mental health disorders often have different gut bacteria compared to those without such conditions. Additionally, some probiotics have shown promise in alleviating symptoms of depression and anxiety.

Tips For Healthier Gut Microbiome

Maintaining a balanced gut microbiome is crucial for overall health. Here are some strategies to support gut health:

• Eat a diverse range of foods: A varied diet rich in fiber, legumes, and fruits promotes microbial diversity.
• Consume fermented foods: Yogurt, kefir, and sauerkraut contain probiotics that enhance gut health.
• Limit artificial sweeteners: Some artificial sweeteners can encourage the growth of harmful bacteria.
• Include prebiotic foods: Bananas, oats, and asparagus contain fibers that nourish beneficial bacteria.
• Breastfeed infants when possible: Breastfeeding promotes a healthier gut microbiome in babies.
• Choose whole grains: Whole grains contain fiber and beneficial compounds that support digestive health.
• Opt for a plant-based diet: Vegetarian diets may reduce inflammation and support a healthier gut microbiome.
• Consume polyphenol-rich foods: Green tea, dark chocolate, and olive oil contain compounds that foster beneficial bacteria.
• Take probiotics if needed: Probiotic supplements can help restore gut balance after disruptions, such as antibiotic use.
• Use antibiotics cautiously: While antibiotics can be life-saving, overuse can harm beneficial gut bacteria.

As measles continues to spread across the United States, with recent case numbers climbing to their highest level in 33 years, growing numbers of Americans are becoming concerned about how at risk they may be.

Health officials in Philadelphia confirmed a potential measles exposure at Philadelphia International Airport and several public transport locations across the city in early January. The Centers for Disease Control and Prevention has also flagged earlier measles outbreaks across Pennsylvania, New Jersey, and New York City.

Adding to the concern, infectious disease tracker BMJGroup reported that measles cases recorded in 2025 are the highest seen since at least 1992.

Against this backdrop, it is important to understand whether measles can be fatal and to recognise the symptoms that should not be ignored.

Is Measles Deadly?

Yes, measles can be deadly and carries a significant risk of death, according to the Centers for Disease Control and Prevention.

“Measles can lead to serious health complications, including pneumonia, inflammation of the brain known as encephalitis, and death,” the CDC states. “Between one and three out of every 1,000 people infected with measles will die. Around one in five people with measles will require hospital care, and one in every 20 children with measles develops pneumonia, which is the leading cause of measles-related deaths in young children.

“One in every 1,000 people with measles will experience brain swelling, which can result in permanent brain damage.”

Measles Symptoms Develop In Three Stages

According to the Mayo Clinic, measles symptoms usually appear in three distinct stages.

Stage 1: Incubation period (10 to 14 days)

During this phase, there are typically no noticeable or warning symptoms.

Stage 2: Early symptoms begin

Symptoms at this stage may include a dry cough, fever, red and inflamed eyes known as conjunctivitis, a runny nose, and a sore throat.

Stage 3: Acute illness and rash

“In the third stage, a rash begins to develop, usually starting on the face. Small white spots called Koplik spots may appear inside the mouth two to three days after symptoms first appear,” the Mayo Clinic explains. “The measles rash typically shows up three to five days after the initial symptoms.

“Over the following days, the rash spreads to the arms, torso, and legs. Alongside the rash, fever often rises rapidly and can exceed 105 degrees Fahrenheit,” the guidance continues. “Eventually, the fever subsides, and the rash fades from the body starting at the head and moving downward.”

How Do You Treat Measles?

“If individuals aged six months or older are exposed to measles and do not have immunity from prior infection or vaccination, they can receive the measles vaccine within three days of contact with the virus,” the Mayo Clinic advises. “After vaccination, quarantine at home is not required.

“For children up to 11 months old who are exposed and are not immune, a dose of antibodies known as immune globulin can be given within six days of exposure to help the body fight the infection.”

Receiving this antibody treatment requires a 21-day quarantine period.

The NHS has issued advice for anyone taking a widely prescribed medication, warning of possible “serious” side effects. If you are currently on atorvastatin, it’s important to be cautious about what other medicines or supplements you take alongside it.

What Is Atorvastatin?

Atorvastatin belongs to a class of drugs called statins, which help lower cholesterol levels. It is usually prescribed for people with high cholesterol to reduce the risk of heart disease, including heart attacks and strokes.

NHS Issues Guidance on Atorvastatin

Your GP may also recommend atorvastatin if you have a family history of heart disease or a long-term condition such as type 1 or type 2 diabetes or rheumatoid arthritis. As with any medicine, it’s vital to follow official guidance on how to take it safely.

Atorvastatin: Interactions With Other Medicines

On its website, the NHS lists certain “cautions with other medicines.” This means you should check that atorvastatin is safe to take alongside any other drugs or supplements.

The NHS explained: “Some medicines can affect the way atorvastatin works and can increase the chances of you having serious side effects, such as muscle damage.” You should tell your doctor or pharmacist if you are taking any of the following:

• Antibiotics, including erythromycin, clarithromycin, rifampicin, or fusidic acid
• Antifungals, such as ketoconazole, voriconazole, or fluconazole
• Certain HIV medications
• Some hepatitis C treatments
• Warfarin, used to prevent blood clots
• Ciclosporin, for psoriasis or rheumatoid arthritis
• Colchicine, used for gout
• Contraceptive pills, such as the combined pill
• Blood pressure or heart medicines, including verapamil, diltiazem, or amlodipine
• Amiodarone, used for irregular heartbeats (atrial fibrillation)

If you need to take one of these medicines while on atorvastatin, your doctor may:

• Recommend a lower dose of atorvastatin
• Suggest a different statin
• Advise pausing atorvastatin temporarily

These are not all the drugs that can interact with atorvastatin. “For a full list, see the leaflet in your medicine packet or speak to your pharmacist,” the NHS said.

The health service also advised checking with your doctor or pharmacist before taking supplements like St John’s wort or CoQ10 while on atorvastatin.

Atorvastatin Common Side Effects

The NHS lists these common side effects, which affect more than one in 100 people:

• Nausea or indigestion
• Headaches
• Nosebleeds
• Sore throat
• Cold-like symptoms, such as runny or blocked nose, or sneezing
• Constipation or bloating
• Diarrhoea

“Drinking large amounts of alcohol regularly increases the risk of side effects and liver problems while taking atorvastatin,” the NHS added. “If side effects make you want to stop taking the medicine, speak to your doctor first. They may be due to another cause, and your doctor can suggest lowering the dose or switching medicines.”

Atorvastatin Serious Side Effects

Stop taking atorvastatin and contact a doctor or call 111 immediately if you experience:

• Unexplained muscle pain, tenderness, weakness, or cramps, which could indicate muscle breakdown and kidney damage
• Yellowing of the whites of your eyes or your skin, pale stools, or dark urine, which may signal liver problems
• Skin rash with pink or red blotches, particularly on the palms or soles, possibly indicating erythema multiforme
• Severe abdominal pain, a potential sign of acute pancreatitis
• Cough, shortness of breath, or unexplained weight loss, which could indicate lung disease
• Weakness in your arms or legs that worsens with activity, double vision, drooping eyelids, difficulty swallowing, or shortness of breath, which may be a sign of myasthenia gravis.

Keeping the television on while falling asleep or leaving a light on in the bedroom may feel reassuring, but new international research suggests it could seriously affect heart health. A recent study has found that exposure to light at night significantly raises the risk of heart disease, even if a person believes they are sleeping well.

Sleeping With Lights On Could Harm Your Heart, Study Warns

The findings come from a large, long-term study carried out by researchers in Australia and the United States. The team followed nearly 90,000 adults in the United Kingdom over a period of nine years. Participants were given light sensors to accurately measure how much light they were exposed to during sleep.

Researchers tracked cases of heart attack, heart failure, and stroke throughout the study period. The results were striking. Compared to people who slept in complete darkness, those exposed to light at night faced a 56 percent higher risk of cardiovascular problems. The risk of heart failure increased by 47 percent, while the likelihood of coronary artery disease rose by 32 percent. The study noted that this risk was particularly higher among women. The risk of stroke was also found to be up to 30 percent higher.

Why Night-Time Light Is Dangerous

According to the research, published in JAMA Network Open, the main reason behind this increased risk is disruption of the body’s circadian rhythm. This internal biological clock regulates sleep, hormone release, metabolism, and other vital functions.

Artificial light at night interferes with this natural rhythm, pushing the body into a state of imbalance. Over time, this ongoing disruption places added strain on the cardiovascular system. Researchers warned that for people over the age of 40, exposure to light during sleep is emerging as a significant risk factor for heart disease.

Professor Frank Scheer, a neuroscientist at Brigham and Women’s Hospital, believes doctors should look beyond sleep duration when assessing patients’ sleep habits. He says physicians should also ask about bedroom conditions, including light exposure.

“There is no harm in keeping the bedroom completely dark,” he explained. “In fact, it is extremely beneficial for overall health.”

Simple Tips For Better, Heart-Healthy Sleep

Experts suggest a few practical steps to reduce light exposure at night:

• Turn off the television, mobile phones, and laptops before going to bed
• If light is needed for safety, keep it below 5 lux, roughly equivalent to the soft glow of a few candles
• Use thick, dark curtains to block out streetlights and outside glare
• Sleeping in darkness may seem like a small change, but researchers say it could play an important role in protecting heart health over time.

Researchers also noted that many people underestimate how much light they are exposed to at night. Even dim sources such as alarm clocks, charging indicators, or light filtering in from nearby buildings can affect the body’s natural night-time processes. Over years, this low-level but constant exposure may quietly increase the risk of high blood pressure, insulin resistance, and weight gain, all of which are closely linked to heart disease. The study reinforces a growing body of evidence that sleep quality is shaped not just by how long we sleep, but by the environment we sleep in.