Heart disease is often linked to high cholesterol, obesity, or lack of exercise. However, there is mounting evidence that suggests that mental health plays a crucial role in cardiovascular well-being. Stress, anxiety, and depression can silently strain the heart, increasing the risk of serious complications.

A recent study, published in Nature Human Behaviour, showed that loneliness has a significant impact on proteins present in a person's blood. For the study, researchers used data from more than 42,000 participants to explore whether the 9.3% who reported social isolation and 6.4% who reported loneliness had different levels of proteins in their blood compared with those who did not. The researchers then studied data that tracked the health of participants over an average 14-year period.

"We found around 90% of these proteins are linked to the risk of mortality," Dr Chun Shen, Fudan University in China, who is also the lead researcher said. "In addition, about 50% of the proteins were linked to cardiovascular disease, type 2 diabetes and stroke," he added.

Dr Shrey Kumar Srivastav, senior consultant at Sharda Hospital, said that subtle symptoms of heart disease, such as fatigue, shortness of breath, swelling in the lower legs, dizziness, and jaw pain, are often overlooked or attributed to stress and ageing. "Women, in particular, may experience atypical signs like extreme fatigue, indigestion, or upper abdominal pain instead of classic chest pain, leading to delayed diagnosis," he added.

Can Mental Health Issues Trigger Heart Diseases?

Chronic stress can trigger harmful cardiovascular effects, including elevated blood pressure, increased heart rate, and inflammation—key contributors to heart disease. Anxiety and depression further impact heart health by disrupting sleep patterns, raising stress hormone levels, and encouraging unhealthy habits like poor diet and inactivity.

Mental health issues like depression and anxiety have a profound impact on the heart. They don’t just affect emotions but can increase inflammation and put extra strain on the cardiovascular system, warns Dr Srivastav.

Certain risk factors, such as obesity and diabetes, disproportionately affect women, making them more vulnerable to heart failure with preserved ejection fraction (HFpEF). However, due to gender-specific symptom variations, heart disease in women often goes undiagnosed for longer.

Obesity is more prevalent in women than men and is a major risk factor for heart failure. Diabetes, too, has a greater impact on women’s heart health, yet diagnosis and treatment delays are common. Addressing this gap requires increasing awareness, training healthcare providers, and promoting early diagnostic tools,” explains Dr Srivastav.

How Can You Protect Your Heart?

A simple yet effective way to support heart health is by committing to a brisk 30-minute walk daily. Walking not only helps regulate blood pressure and manage weight but also improves circulation and reduces stress.

"Regular physical activity, paired with a heart-healthy diet rich in fruits, vegetables, whole grains, and lean proteins, significantly lowers cardiovascular risks," advises Dr Srivastav.

Heart disease can often go undetected until a major event occurs, making routine screenings essential.

- For women: Begin screenings around age 30 and continue with regular checkups.

- For men: Start screenings at age 35.

Health screenings, including blood pressure checks, cholesterol tests, and electrocardiograms (ECGs), are critical for early detection of silent heart conditions.

A powerful veterinary drug has been lately spotted in Scotland's illegal drug supply, raising concern among health officials and addiction specialists about severe sedation, overdose-related deaths and dangerous withdrawal symptoms.

Medically known as medetomidine, the drug is used by veterinarians to sedate animals. It is strictly not approved for use in humans.

According to Public Health Scotland, the drug has been located in Scotland's unlawful drug supply and is most likely being mixed into drugs and peddled as heroin and benzodiazepines.

According to recent reports, medetomidine was detected in one in five heroin samples tested between March and June 2026, highlighting it has seeped deeply into various parts of the drug supply. It has been detected in several areas, including Lanarkshire, Falkirk, Dundee, Fife and the Highlands.

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What Is Medetomidine?

Medetomidine is a sedative that affects the alpha-2 receptors in the nervous system, producing profound sedation and slowing down several bodily functions, rendering the user in a ‘zombie-like’ state.

The UK's Advisory Council on the Misuse of Drugs has previously warned that medetomidine can cause severe sedation, reduced heart rate and other negative cardiovascular effects. In severe toxicity, people may require intensive care and mechanical ventilation.

Unlike an opioid overdose, naloxone does not reverse medetomidine's sedative effects. This is particularly concerning as the drug was found mixed with opioids like heroin.

Also read: US Teen's Death Sparks Warning Over Synthetic Drug Deadlier Than Fentanyl

Why Is It Being Called A ‘Zombie’ Drug?

The drug is being called a ‘zombie drug’ due to the effects it leaves due to excessive sedation and changed behaviour. After ingesting it, people may become extremely drowsy or unresponsive, while others may experience confusion, hallucinations or agitation. It may also slow their movements and reflexes down.

The bigger concern is the aftereffects of exposure. A recent study of 16 people with confirmed medetomidine exposure found that patients reported severe and unpredictable withdrawal symptoms, sometimes requiring hospital treatment.

Symptoms reported in the study included nausea, vomiting, shaking, rapid heartbeat, and dangerous high blood pressure.

Researchers also found that standard medications used to treat opioid withdrawal did not always adequately control the symptoms linked with medetomidine.

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More About The Drug

Public Health Scotland says that the drug has been detected in brown powders sold as heroin and white tablets sold as diazepam. As people may believe they are taking another drug, they may have no idea that a potent veterinary sedative is also entering their body. This could make tracking the drug supply difficult to predict.

Medetomidine belongs to the same broad class as xylazine, another veterinary sedative that has been increasingly detected in illegal drugs.

Xylazine has become notorious in the US for severe skin wounds linked with repeated exposure. Scientists do not yet know whether medetomidine results in the same effect in humans.

Doctors in Texas are seeing otherwise healthy young and middle-aged workers getting diagnosed with severe kidney disease and, in some cases, reaching kidney failure without the diabetes, high blood pressure or any other long-standing condition that commonly damage the kidneys.

The condition doctors suspect is chronic kidney disease of unknown etiology, or CKDu, a form of kidney disease that has been documented for decades among agricultural and manual workers in hot regions of Central America, Sri Lanka and India. Recent reports suggest similar cases may be going unrecognised in the US, particularly among vulnerable migrant workers.

What Is CKDu?

CKDu is a condition in which a person's kidney function progressively declines without the usual causes of chronic kidney disease.

Diabetes and high blood pressure are among the biggest causes of kidney disease globally. But CKDu presents differently as it been reported predominantly in relatively young workers who may have neither condition.

The disease can damage the kidney's filtering and tubular structures and gradually reduce its ability to remove waste and regulate fluids and electrolytes.

Currently, there are no specific tests or treatment options to tackle CKDu. Doctors generally investigate and rule out other causes of kidney damage while considering a person's occupation and environmental exposures.

Also read: Dialysis Demystified: When Is It Necessary, How Does It Work And Can It Be Avoided?

Young Workers Are At Risk

Geographical location is one of the strongest clues that helps doctors confirm CKDu diagnosis. In Central America, the disease has been particularly associated with people doing strenuous agricultural work in hot and humid conditions.

Similar concerns have emerged among outdoor workers in Texas, including people working in construction, roofing and other physically demanding jobs.

Repeated heat stress and dehydration are among the leading suspected contributors. When someone repeatedly loses large amounts of fluid through sweating and does not adequately replace it, the kidneys can come under considerable stress.

Researchers are also investigating whether pesticides, contaminated water, heavy metals, infections and frequent use of painkillers like NSAIDs could contribute. However, the definite cause of CKDu still remains unknown.

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CKDu Remains Silent Until Significant Kidney Damage Has Occured

CKDu can be particularly dangerous because people may have few obvious symptoms during the early stages. Many affected workers discover the problem through blood or urine tests rather than because they feel seriously ill.

By the time symptoms like severe fatigue, weakness, nausea, sleep problems or breathlessness develop, kidney function may already be substantially reduced.

A US study based on patients receiving emergency dialysis at a Texas county hospital found that 17% had clinically diagnosed, suspected or possible CKDu-related kidney failure.

Climate Change Could Be Another Contributing Factor

Researchers are increasingly looking into the connection between extreme heat and kidney health. The National Institute of Environmental Health Sciences says CKDu has emerged mainly among agricultural workers in hot, humid regions and notes that rising global temperatures could increase exposure to severe occupational heat stress.

But scientists are still trying to determine exactly how heat, dehydration and other workplace exposures interact to result in last-stage kidney failure. That uncertainty is one reason why CKDu remains such a difficult disease to study.

A 2026 International Society of Nephrology report noted that proposed causes such as heat stress may contribute to kidney injury without necessarily explaining exactly how the disease begins.

US President Donald Trump wants his administration to gain greater control over how billions of dollars in biomedical research funding are distributed. He recently proposed new board that could have the power to veto individual grants of National Institutes of Health (NIH).

The proposal, drafted by Budget Director Russell Vought, emerged after a White House meeting was held on September 18, according to the latest reports. The proposed board would include Vought and NIH Director Jay Bhattacharya, whose unanimous agreement will reportedly be required for grants.

The plan is just a proposal and has not yet been formally issued, and details of its structure and authority could change.

Current Process Of Distributing NIH Grants

The NIH financially back research into cancer, heart disease, infectious diseases, neurological disorders and many other serious conditions. Its current grant process relies heavily on scientific peer review, in which experts evaluate applications for scientific merit before funding decisions are made.

NIH says its peer-review system is intended to provide “fair, independent, expert, and timely scientific reviews” and to prevent funding decisions being coloured from inappropriate influence.

At the second stage, advisory councils made up of scientists and public representatives review applications and provide recommendations.

The institute or centre director currently makes the final funding decision, taking those recommendations and other factors into account. The proposed system could introduce another layer of political oversight above that process that could significantly influence how funds are allocated to research.

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Trump Administration Opposes Funding For 'Woke' Research

The administration has argued that federal research funding should better reflect its policy priorities and that some previous grants supported research it considers misaligned with those priorities.

At the White House meeting, Vought reportedly criticised the NIH for funding what he described as “woke” initiatives that conflicted with Trump's goals.

The administration has also argued that changes to research funding are needed to improve oversight and ensure taxpayer money supports what it considers scientifically sound and nationally relevant research.

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What Could The Proposed Board Change?

According to the reports, the board could review NIH grant awards and block funding that does not align with the administration's priorities. That would represent a significant change from a system in which scientific review is central to determining which research proposals are eligible for funding.

The NIH has already undergone changes to its grant process under the Trump administration. Separately, the White House has proposed more rules that would give political authorities greater power over federal grants across government agencies and sideline scientific peer review advisory.

NIH's Stance

The NIH has not confirmed the details of the proposed board. In a statement reported by The New York Times, NIH spokesperson Joshua Pradko said, “N.I.H. remains committed to its mission of funding biomedical research to benefit the health of the American people.”

Responding to reports that Vought wanted to rescind NIH funding, Pradko also said, “There will be no rescissions to N.I.H. grant monies. All N.I.H. grant monies will be spent.”

The NIH is currently dealing with a record number of applications. More than 40,000 grant applications have been received for the January 2027 council round, according to an NIH update issued September 18.