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.

Plastic containers have been discouraged for a long time now, especially for heating food or storing hot food. Studies have associated this habit with a heightened risk of cancer, but now an expert has specifically spoken about black plastic containers and what makes them worse for you. According to Dr Rakesh Kumar Sharma, Senior Consultant Medical Oncologist at M | O | C Cancer Care & Research Centre, Gurugram, cooking or heating food in black containers could be very harmful to your body. Read on to find out how.

Dr Sharma, in an interview with Health and Me, said that cooking food in black plastic receptacles could lead to greater amounts of certain chemicals making their way into your body; however, there currently exists no scientific evidence confirming that this daily activity increases your risk of cancer.

Why is black plastic worse than others?

Dr Sharma explained that black takeaway containers usually consist of recycled plastics, such as e-waste, and can contain flame retardants, BPA, phthalates, etc. When heated in contact with food, especially if the food is hot, fatty, or acidic, more chemicals could potentially make their way into the food from the container. In this way, it may, over time, heighten your risk of developing a malignant tumour.

Black containers are coloured using carbon black, which is included in Group 2B of possible human carcinogens according to IARC, as shown in both animal and limited human research. Moreover, recycled black plastics could contain polycyclic aromatic hydrocarbons and decaBDE, which have shown carcinogenic effects in experiments. This makes black plastic containers worse than other coloured counterparts. Yet, heating food in a plastic container of any colour is not deemed safe.

Do studies verify the side effects of heating food in plastic containers?

Experimental studies conducted in laboratories on microwaveable plastic receptacles reveal the migration of tens of chemicals and millions of microplastics per litre of the food simulant. However, a recent study in 2024 reported that containers labelled as microwave-safe in Korea adhered to contemporary safety standards for these levels, and total exposure fell within safe limits.

Leading cancer associations have confirmed that the usage of plastic packaging, even in microwave applications, has not been linked with increased cancer risks in humans, although there is ongoing research in areas such as black plastics. However, precautionary measures are suggested by experts as a better strategy due to the difficulties of directly studying long-term, low-level exposure to chemical compounds.

How to reduce cancer risk?

When it comes to reducing cancer risk, most doctors recommend quitting smoking and limiting alcohol intake. However, Dr Sharma listed some basic kitchen and eating habits that may come to your rescue:

1. Avoid cooking food in black plastic packaging, particularly if the food is oily or acidic.
2. Move hot food into glass, ceramic, or stainless steel containers for reheating.
3. Only use microwave-safe containers and discard any broken plastic containers.

Most young men assume that if there is no pain, there is no serious problem. Unfortunately, many important testicular conditions, especially testicular cancer, often begin as a painless lump, swelling, or enlargement of one testicle. Because there is no pain, men tend to ignore it, thinking it is due to exercise, minor trauma, tight clothing, cycling, or temporary swelling. Embarrassment and reluctance to discuss genital symptoms also contribute to delay.

Dr. Chandan M. N, Consultant Urologist, Andrologist, Uro-Oncologist & Renal Transplant Surgeon, Apollo Hospitals, Sheshadripuram, Bangalore, spoke about the pain conundrum. The expert said that when it comes to testicular health, absence of pain must not be a reassuring factor.

Pain is usually seen as a warning signal, but in testicular disease, absence of pain should not reassure patients. Testicular cancer is one of the most common cancers in young men, particularly between 15 and 35 years of age, and it can progress quickly if diagnosis is delayed. However, when detected early, it is also one of the most curable cancers.

What are the common signs men may overlook in day-to-day life?

The most commonly overlooked sign is a painless lump or swelling in one testicle.

Sometimes the change is subtle; a testicle may simply feel slightly harder, heavier, larger, or firmer than before. Many men also ignore a dragging sensation, heaviness in the scrotum, or a dull ache in the groin or lower abdomen because these symptoms are mild and not severe enough to disrupt daily life.

Other signs that should not be ignored include sudden fluid collection in the scrotum, change in the shape or size of one testicle, unevenness between the two testicles, persistent discomfort, or a feeling that something is different. Some men may also notice back pain, breast tenderness, or unexplained swelling if the disease has spread. Importantly, not every testicular lump is cancer. Conditions such as hydrocele, varicocele, spermatocele, orchitis, or hernia can also present with swelling or heaviness. But the only safe approach is to get examined rather than assume it is harmless.

How to do a simple self-examination at home?

Young men should know what is normal for their own body. A simple self-examination once a month, ideally after a warm shower when the scrotal skin is relaxed, can help detect early changes.

Men should gently feel each testicle for lumps, swelling, hardness, change in size, or heaviness. Familiarity with one’s normal anatomy makes it easier to notice when something changes. Any new lump, swelling, change in shape, or persistent discomfort should be evaluated promptly by a doctor. Usually, a physical examination and scrotal ultrasound are enough to identify the cause. Early medical advice can differentiate a harmless condition from something serious and, in the case of testicular cancer, can make the difference between simple treatment and advanced disease.

Malaria is widely known as a mosquito-borne disease that causes fever, chills, and body aches. But what many people don’t realize is that in severe cases, it can also affect the heart.

Malaria is caused by parasites belonging to the Plasmodium genus. It may cause complications beyond the bloodstream. In some cases, this may happen in severe malaria, where either the diagnosis or treatment is late.

How Malaria Infection Affects The Heart

Speaking to HealthandMe, Dr. Ravi Prakash, Senior Consultant Cardiology, PSRI Hospital, Delhi, noted that malaria affects different parts of the body, depending on the severity and the patient's immunity.

"In severe malaria cases, the parasite that causes malaria infects the red blood cells, making them sticky. When these stick together, the cells block the flow of blood in smaller blood vessels, limiting oxygenation of important organs, including the heart," Dr Prakash explained.

The condition may then result in myocarditis, arrhythmias, or heart failure. Although these complications rarely affect the heart, they require prompt medical intervention.

Further, Dr. Rakesh Pandit, Senior Consultant & HOD, Internal Medicine, Aakash Healthcare, highlighted that malaria can put stress on the heart either directly or indirectly.

It can lead to inflammation of the heart and result in chest pains, fatigue, or arrhythmia.

"Patients suffering from severe malaria may develop tachycardia or, in worst-case scenarios, experience heart blockage," Dr. Pandit told HealthandMe.

The Role of Anemia

Furthermore, malaria infection may limit the blood flow to the heart by increasing the stickiness of the blood, thus blocking small blood vessels.

"Anemia associated with malaria can increase the load on the patient's heart," Dr Pandit said.

Fever, dehydration, and hypoxia further increase cardiac stress in malaria patients, who may end up having their pre-existing heart conditions unmasked.

Malaria: Early Signs Of Heart Damage?

Early detection is important. Besides classic malaria symptoms such as fever, sweats, shivers, headaches, and tiredness, any unusual symptoms such as chest pains, difficulty breathing, rapid heartbeats, or excessive weakness must be considered carefully.

"These could be signs of organ damage caused by the disease, which means early diagnosis and treatment are vital. Blood tests will be conducted to identify malaria parasites in your body," Dr. Prakash said.

Malaria And Heart: Who Is At More Risk

Some individuals are more susceptible to contracting malaria, which increases their chances of developing complications from the disease.

These include

• children,
• pregnant women,
• the elderly,
• immunocompromised patients.

"People who have underlying diseases may develop heart-related problems due to the malaria infection," Dr Prakash said.

Moreover, travelers to malaria-endemic areas without adequate protection from the disease are also likely to be affected.

How To Prevent?

The best method to avoid contracting malaria is to take preventive measures.

• Individuals must protect themselves from mosquito bites.
• Applying insect repellents, sleeping under mosquito nets, and covering your arms and legs when you go out are effective ways to shield yourself from being bitten.
• Proper hygiene and sanitation practices are necessary to prevent mosquitoes from reproducing.
• Having a good general health status is another preventive measure. Your immune system must be able to combat invading agents.