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.

India is taking significant steps to enhance its vaccination strategy, with a special focus on adults, particularly those aged 55 and above, said Dr. N K Arora, Member of the National Technical Advisory Group on Immunisation in India (NTAGI), as part of the World Immunization Week.

NTAGI is the highest advisory body on immunization in the country, which consists of independent experts who provide recommendations on vaccines after reviewing data on disease burden, efficacy, and cost-effectiveness of vaccines.

In an exclusive interaction with HealthandMe, Dr. Arora shared that the country “is in the process of establishing priority pathogens and vaccines aimed at the adult population”.

This initiative will target those above the age of 55 or 60 to tackle infections that are particularly serious in older individuals, especially those living with chronic conditions like diabetes, hypertension, and cancer.

“The process has started. This year, we will be moving in that direction,” said Dr. Arora.

HPV Vaccination: A Milestone in Preventing Cervical Cancer

The expert lauded the introduction of the HPV vaccine for young girls. Dr. Arora highlighted the critical importance of this initiative, given India’s status as the country with the highest number of cervical cancer cases globally.

"Cervical cancer is preventable by the HPV vaccine, and we are now in the fortunate position of having a domestically manufactured vaccine," he explained.

The first round of vaccinations has already commenced, and Dr. Arora urged the media and public to dispel any misinformation surrounding the vaccine to ensure its success.

An Indigenous Dengue Vaccine

Further, the vaccine expert highlighted the potential introduction of an indigenous dengue vaccine, currently undergoing trials.

“The trials will take at least two and a half years, which means by the end of 28, we will have the results,” Dr. Arora said.

He emphasized the severity of dengue when it turns from a mild illness into a severe one, particularly among young adults.

The dengue vaccine, being developed indigenously, is expected to play a crucial role in protecting the 10-20 age group, who are most susceptible to severe dengue cases.

“We are waiting for the results of the trials, and once the vaccine is recommended by the NTAGI, the system will be ready to adopt it,” said Dr. Arora.

Also read: World Immunization Week: Vaccines Are Like Insurance, They’re Safe—Take Them, Says Dr NK Arora | Exclusive

India In The Forefront of Vaccine R&D

Dr. Arora stated that India, known as the pharmacy of the world, is playing a significant role in the global vaccine landscape.

“One feels very proud to be an Indian as every vaccine administered in India is made in India,” he said, noting that India also "provides two-thirds of the global vaccine supply".

This achievement positions India as a global leader in vaccine research and development, contributing substantially to global health initiatives.

"These initiatives are vital for the future of public health in India," Dr. Arora said.

Amid rising cases of measles in neighboring countries, India is concerned, and steps are being taken to ward off any potential outbreaks in the nation, said Dr NK Arora, Chair of the National Verification Committee (NVC) for Measles-Rubella Elimination in India.

In an exclusive conversation with HealthandMe, the expert emphasized the growing concerns over the spread of measles, particularly following outbreaks in Myanmar and Bangladesh.

He noted that in the case of polio, India is free, and fortunately, neighbors like Nepal, Bangladesh, Bhutan, and even Myanmar are all polio-free.

“But measles is something which we are worried about,” Dr Arora said.

"We are aware of outbreaks in Myanmar, particularly among the Rohingya population, and the subsequent spread to Bangladesh, where there has been a large-scale outbreak with numerous fatalities," he added.

Measles: Strengthening India's Porous Border

As per official data, Bangladesh has recorded 227 child deaths since March in one of its worst outbreaks of measles in decades, with the number of suspected cases reaching nearly 35,000, AFP reported.

Dr Arora pointed out that the porous borders India shares with Bangladesh make the risk of cross-border transmission higher, particularly given the large movement of people between the two countries.

To counter this, the expert mentioned that India has strengthened surveillance in states bordering Bangladesh, like Tripura, Manipur, and Meghalaya, but also admitted that more efforts are needed.

Meghalaya’s state health department have called for stepping up surveillance in East Khasi Hills District. Similarly, Health officials in Tripura are also assessing the prevailing measles and rubella situation, with a focus on vaccination coverage and containment measures. The health officials have stressed to strengthen surveillance, early detection, reporting, and response mechanisms.

Also read: Measles Again On The Rise Globally: Is India At Risk?

Notably, Nepal has also reported at least four outbreaks of the deadly viral disease —one in Sarlahi and three in Baglung—since the start of 2026.

"If even one case of measles comes in, it can spread quickly due to the virus's high reproductive or transmission dynamics. A single infected child can spread the virus to up to 12 to 18 others very quickly, which is extremely worrisome," he explained.

Dr. Arora stressed the importance of identifying suspected measles cases early, which he defined as any child with fever and rash.

"While these symptoms could indicate other diseases too, it's crucial to have a sensitive definition to quickly detect measles cases.

Once a suspect with fever and rash is identified, samples are promptly sent to the lab for confirmation, and immediate alerts are issued," he told HealthandMe.

Measles: Sporadic Outbreaks In India

Dr. Arora also addressed the ongoing efforts to eliminate measles and rubella in India, which have been bolstered by targeted interventions and public awareness campaigns.

Since the beginning of the year, India is seeing sporadic outbreaks of measles. Madhya Pradesh's Gwalior reported three outbreaks, and Morena six.

Over January and February 2026, 41 children were diagnosed with measles in Tikari village in Madhya Pradesh.

However, swift action by health authorities with proactive frontline engagement and data-driven rapid response prevented an escalation into large measles outbreaks.

"Our goal is to prevent any deaths from measles, which in today's time, should be entirely avoidable," said the Chair of the NVC.

Referring to increasing child deaths due to the highly infectious disease in Bangladesh, he said: "If a child dies from measles, it indicates a significant gap in the quality of care provided."

Further, Dr. Arora explained that measles complications such as severe pneumonia, sepsis, and meningitis are of particular concern, as these can be exacerbated by weakened immunity following other illnesses, such as malaria. Therefore, he emphasized the need to improve the quality of care and ensure timely and effective treatment for affected children.

Read more: Robert F. Kennedy Jr. Denies Link To Measles Outbreak At Senate Hearing

What is Measles?

Measles is one of the world's most contagious diseases, according to the World Health Organization (WHO), and is spread through coughs and sneezes.

The vaccine-preventable disease can affect people of any age but is most common among children, and can cause complications that include brain swelling and severe respiratory problems.

Symptoms typically appear seven to 14 days after exposure and may include:

• high fever,
• cough,
• runny nose,
• red eyes,
• rashes across the body.

Ever tried logging off social media platforms like Facebook and Instagram? For many, checking notifications, scrolling through feeds, and engaging with content has become second nature, often leading to an unnoticed addiction.

While digital dependence can significantly impact mental health, relationships, and overall well-being, most people don’t realize how much time they’re actually spending online.

To understand its effects, researchers at Stanford University in the US asked the 36,000 study participants to log off on weekends from their Facebook and Instagram accounts. The results showed that the people who stayed off felt measurably better.

Disconnecting from social media was seen as a powerful way to regain balance and focus in the increasingly connected world.

The study split participants into groups: about 275 were paid to deactivate their accounts for six weeks, while others logged off for just one week. Both groups showed improved emotional well-being compared to those who kept scrolling, but the effect was more pronounced for Facebook users who went longer without it.

Facebook users over 35 showed the biggest mood improvements, while among Instagram users, the 18-to-24 group benefited most.

Also read: Is India Set To Implement A Social Media Ban For Children?

Social Media And Mental Health

An increasing number of studies and the community at large are convinced that social media are detrimental to our mental health and general well-being.

According to a recent YouGov poll taken in the UK in January 2026, 37 percent of adults gave a general negative review of social media's impact on their mental health, more than twice the number of people who say otherwise.

Merely 14 percent of them admitted to receiving a positive effect from social media on their mental health.

The Pew Research Center survey, conducted in 2024, discloses that 45 percent of US teenagers think social media is damaging their sleep, and 40 percent believe it is hurting their productivity, which are both key factors of mental health.

In 2023, former US Surgeon General Vivek Murthy named social media as a major threat to the mental health of teens. He also released a social media advisory about social media and mental health.

The advisory indicates that frequent social media use could be associated with changes in parts of the brain related to emotions and learning. Additionally, it can affect impulse control, social behavior, emotional regulation, and sensitivity to social punishments and rewards.

Read More: The Cost Of Social Media Addiction: Study Says It Can Give Kids Eating Disorders

In serious cases, social media can also contribute to self-harm or suicidal thoughts, especially among teens and children facing cyberbullying or trolling. Young people are particularly vulnerable to online pressures, negative comparisons, and feelings of rejection.

“Excessive social media exposure has been linked to anxiety, depression, sleep disruption, and, most importantly, difficulty with regulating attention and emotions. Algorithms intensify comparison, validation-seeking, and exposure to harmful content, which children lack the maturity to process,” Dr. Sachin Pradeep Baliga, Associate Consultant Mental Health & Behavioural Sciences, Fortis Healthcare, told HealthandMe.

Is Quitting The Only Option?

According to mental health experts, moderation and mindfully controlled usage could be the key.

\

It is far more effective to come up with a plan that helps your interaction with social media platforms be healthier, such as limiting your time on social media platforms, avoiding harmful content, and pursuing real-world connections, rather than completely demonizing social media.