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 oncologists, we often meet patients at some of the most difficult moments of their lives. Yet there are times where a patient's journey reminds of the extraordinary resilience that people can show while facing the challenges that cancer presents

I recently treated a 38-year-old woman whose story has stayed with me.

Having just welcomed her baby into the world, her demanding yet joyful routine revolved around feeding schedules and sleepless nights. It was during this period that she noticed a hard lump in her breast.

Breast Lumps Can Cause Aggressive Breast Cancer

A sonomammography revealed a suspicious BIRADS 4A lesion. A biopsy confirmed Triple-Negative Breast Cancer (TNBC), which is one of the more aggressive forms of breast cancer. It was classified as a Stage III disease after evaluation through PET-CT which showed involvement of the axillary lymph nodes. The tumor also had a high Ki-67 index, indicating that it was growing rapidly.

Facing Cancer While Caring for A Newborn

The untimely diagnosis found the mother facing difficult questions about cancer treatment, her future and her ability to care for her child. One of the immediate challenges was that she had to stop breastfeeding.

Under the guidance of her pediatrician, her baby was transitioned to bottle feeds. This can be an emotionally challenging process for mothers as the feeling of guilt tends to seep in when breastfeeding plans are disrupted by illness.

A Modern Treatment Approach

After detailed and prolonged discussions with the patient and her family, we initiated treatment with neoadjuvant immunotherapy using pembrolizumab in combination with chemotherapy. This approach has emerged as one of the more prominent advances in the treatment of high-risk Triple-Negative Breast Cancer, having significantly improved outcomes for many patients.

Motherhood is a physically and emotionally taxing experience but the patient showed incredible strength during her cancer therapy, driven by her child and the unwavering support of her family.

Following completion of neoadjuvant therapy, repeat PET-CT imaging showed a near-complete response. She subsequently underwent surgery, and the final pathology report revealed a pathological complete response, meaning no residual invasive cancer had been detected.

This was the desired outcome for the treating team as well as the patient. She later completed the remaining course of immunotherapy, bringing her total treatment duration to one year. Today, both mother and child are doing well.

Breast Cancer Can Occur During Pregnancy

This tremendous journey highlights an important message. The fact that breast cancer can occur during pregnancy and the postpartum period deserves wider attention. Any breast lump that persists or feels unusual should be evaluated by a healthcare professional, as early diagnosis remains one of the most important factors in achieving positive outcomes.

The process is reflective of the advances in cancer treatment that are changing the outlook for patients with aggressive cancers. These advances are done through the integration of immunotherapy into treatment protocols which is helping more patients achieve improved long-term outcomes. The mother’s story is a reminder that cancer and motherhood are not mutually exclusive journeys.

Her ability to navigate this path is due to her timely diagnosis, access to appropriate treatment, family support and personal resilience. What began as a frightening diagnosis soon after childbirth ultimately became a story of hope, courage and survival. This is a powerful reminder to every new mother who might discover an unusual breast lump, that listening to your body and seeking medical advice early can make all the difference.

Constipation is one of the most common digestive complaints affecting people of all ages. It is generally defined as having fewer than three bowel movements per week, passing hard stools, excessive straining, or a feeling of incomplete evacuation.

While occasional constipation is usually not a cause for concern and can often be managed through lifestyle changes, persistent or severe constipation may sometimes indicate an underlying health condition that requires medical attention.

Common Causes of Constipation

Several factors can contribute to constipation, including inadequate fiber intake, insufficient water consumption, lack of physical activity, stress, changes in routine, and certain medications. In many cases, improving dietary habits and maintaining an active lifestyle can help restore normal bowel function. However, when constipation becomes chronic or is accompanied by other symptoms, it should not be ignored.

Warning Signs

One of the most important warning signs is a sudden change in bowel habits, particularly in adults over the age of 50. Persistent constipation associated with unexplained weight loss, loss of appetite, fatigue, abdominal pain, bloating, or blood in the stool may indicate a more serious condition, such as colorectal cancer. Early detection is crucial, making timely medical evaluation essential.

What's Behind Chronic Constipation

Chronic constipation may also be linked to several medical disorders. Conditions such as hypothyroidism, diabetes, Parkinson’s disease, multiple sclerosis, and certain neurological disorders can affect the normal movement of the intestines. In some individuals, constipation may result from pelvic floor dysfunction, where the muscles involved in bowel movements do not coordinate properly.

Irritable Bowel Syndrome (IBS), particularly the constipation-predominant type, is another common cause of ongoing bowel difficulties. Inflammatory bowel diseases, intestinal narrowing, or bowel obstruction can also present with severe constipation and abdominal discomfort.

Many people rely on over-the-counter laxatives for relief. While these medications can be effective when used appropriately, long-term or excessive use without medical supervision may mask an underlying problem and can sometimes worsen bowel function over time.

How To Maintain Good Digestive Health

To maintain good digestive health, individuals should consume a fibre-rich diet that includes fruits, vegetables, whole grains, and legumes. Adequate hydration, regular exercise, and responding promptly to the urge to pass stools are equally important.

Constipation is often harmless, but persistent symptoms should never be dismissed. If constipation lasts for several weeks, becomes increasingly severe, or is associated with alarming symptoms such as bleeding, significant weight loss, or severe abdominal pain, seeking medical advice is essential. Recognizing these warning signs early can help identify serious health conditions and ensure timely treatment.

(By Dr. Pradeepta Kumar Sethy, Director Gastroenterology, Manipal Hospital EM Bypass & Mukundupur)

Yoga may offer benefits beyond flexibility and stress relief, with doctors from the All India Institute of Medical Sciences (AIIMS), New Delhi, ahead of International Yoga Day 2026, saying that studies have shown the ancient practice could help improve outcomes in conditions ranging from unexplained male infertility to autoimmune disorders such as rheumatoid arthritis and fibromyalgia.

This year marks the 12th International Day of Yoga, observed annually on June 21. The theme for this year, "Yoga for Healthy Ageing," highlights the practice's potential to enhance mobility, balance, flexibility, and mental well-being, helping people maintain health and independence at every stage of life.

Yoga And Unexplained Male Infertility

Dr. Rima Dada, Professor at the Laboratory for Molecular Reproduction and Genetics, Department of Anatomy, AIIMS Delhi, told HealthandMe that cases of unexplained male factor infertility have increased in recent decades. In many of these cases, standard sperm parameters appear normal, but sperm cells are affected by oxidative stress and DNA damage.

According to Dr. Rima, studies conducted in men with unexplained infertility found that regular yoga practice reduced oxidative stress, decreased sperm DNA damage, and normalized the expression of genes critical for early embryonic development. These benefits, however, generally require consistent practice for more than six months.

Also read:International Yoga Day 2026: 10 Desk Yoga Poses That Can Undo Hours of Sitting

Dr. Rima described yoga as an “art of living” that combines

• mindful asanas,
• relaxation techniques,
• pranayama,
• meditation,
• healthy nutrition,
• adequate sleep.

According to her, such lifestyle measures may improve sperm DNA quality, motility, and overall reproductive health while potentially reducing the burden of genetic and epigenetic disorders in future generations.

Yoga And Rheumatoid Arthritis

Dr. Rima also highlighted the role of yoga in rheumatoid arthritis, an autoimmune disease that typically affects small joints initially and may later involve larger joints as well as organs such as the lungs, heart, and brain.

She described yoga as an "art of living" that should be incorporated into daily life through mindful asanas, relaxation techniques, pranayama, meditation, a whole plant-based diet, and adequate sleep.

Read More: Trying to Quit Tobacco? Yoga Could Improve Your Chances, Suggests Study

She added that research has shown that yoga, including asanas, pranayama, and meditation, can help reduce inflammatory cytokines linked to swelling, pain, stiffness, and joint damage. Pranayama practices such as Anulom Vilom, Bhramari, and Ujjayi were highlighted as particularly beneficial.

For people living with rheumatoid arthritis, she recommended beginning with gentle loosening exercises under the supervision of a trained yoga therapist and avoiding strenuous postures during acute flare-ups. Pranayama and meditation, she said, may help reduce inflammation, improve emotional resilience, and support longer periods of remission.

Yoga As An Adjunct Therapy

Dr. Uma Kumar, Head of the Department of Rheumatology at AIIMS New Delhi, explained that autoimmune diseases occur when the immune system mistakenly attacks the body’s own tissues and organs.

Conditions such as rheumatoid arthritis, systemic lupus erythematosus, Sjogren’s syndrome, myositis, antiphospholipid antibody syndrome, and IgG4-related disease can significantly affect quality of life, often leading to pain, fatigue, depression, sleep disturbances, and reduced mobility.

“All these components are improved by yoga,” Dr. Kumar said.

However, she stressed that yoga should be viewed as an adjunct to medical treatment rather than a replacement. According to her, yoga may complement conventional therapies by improving sleep, flexibility, mental well-being, lifestyle habits, and overall quality of life.

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Yoga's Benefits For Fibromyalgia

Dr. Renu Bhatia, Additional Professor in the Department of Physiology at AIIMS Delhi, said supervised yoga therapy may help improve physical activity, sleep quality, muscle blood flow, pain levels, and flexibility in people with fibromyalgia.

The experts described fibromyalgia as a condition characterized by widespread pain despite normal laboratory findings and the absence of obvious inflammation.

Dr. Renu noted that studies have shown six weeks of supervised yoga intervention can reduce tender points while improving sensory symptoms, brain function, and neural excitability. However, she cautioned that yoga should be practiced under supervision, as excessive joint movement may aggravate symptoms in some patients.