What Is Alkaptonuria? The Rare Disease That Turns Your Pee Black – Here’s Why

Updated Feb 7, 2025 | 08:00 AM IST

SummaryAlkaptonuria is a rare genetic disorder that causes black urine due to homogentisic acid buildup, leading to joint pain, cartilage damage, and skin discoloration. It has no cure but can be managed.
What Is Alkaptonuria? The Rare Disease That Turns Your Pee Black – Here’s Why

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A condition, known commonly as "black urine disease" or Alkaptonuria is a rare genetic disorder involving protein metabolism, and it has its root in the mutation of the homogentisate 1,2-dioxygenase gene, which in turn causes homogentisic acid accumulation in the body. The appearance of dark urine after exposure to air is due to this kind of accumulation; however, a variety of symptoms can be expected, such as joint stiffness, changes in pigmentation, and other long-term health complications. Although the prevalence has been estimated to be between 1 in 250,000 and 1 in 1 million people in the United States, its effects are indeed high on those affected.

Alkaptonuria is an autosomal recessive disease, meaning that the child must inherit a defective copy of the HGD gene from both parents. If both parents are carriers, their offspring have a 25% chance of inheriting two faulty genes and developing alkaptonuria. The condition is genetic but is often not diagnosed for years because it progresses slowly and its early symptoms appear to be harmless.

Symptoms of Alkaptonuria

The most characteristic and common initial symptom of alkaptonuria is dark urine. The reason for this is due to the fact that excess HGA is excreted in the urine and upon oxidation in the presence of air, it gives the urine a brown or black color. Though it is often considered cosmetic, the long-term accumulation of HGA within the connective tissues produces more complicated health problems.

Progressive joint pain and stiffness: The accumulation of HGA in cartilage leads to early-onset osteoarthritis, making movement increasingly difficult over time.

Skin and eye pigmentation changes: Affected individuals may develop bluish or grayish discoloration of the sclera (white part of the eye) and the skin, particularly in areas exposed to friction.

Cardiovascular and respiratory problems: With age, HGA accumulation can lead to valve calcifications in the heart and stiffening of connective tissues in the respiratory tract, which can cause problems in middle and old age.

Decreased mobility and spinal problems: The spine may become stiff and painful due to chronic cartilage degeneration.

These symptoms usually begin to manifest during adulthood, leading to severe complications in a person's 40s or 50s and significantly affecting the quality of their life.

How is Alkaptonuria Diagnosed?

Because of its rarity, alkaptonuria is often mistaken or overlooked early in life. However, there are several ways to confirm the condition:

Urine Testing: The gold standard in the diagnosis is the testing of urine samples for high levels of homogentisic acid via gas chromatography. In case of oxidation, which changes the color of urine to black, it is indicative of alkaptonuria.

Genetic Testing: Confirmatory genetic testing reveals mutations of the HGD gene to diagnose the condition conclusively.

Blood Tests: High levels of HGA in the blood can be used as further evidence.

Imaging Studies: X-rays and MRIs will expose cartilage and joint damage characteristic of alkaptonuria.

Management of Alkaptonuria: Is There A Cure?

At present, there is no cure for alkaptonuria; however, various treatment approaches can reduce its symptoms and slow the disease's progress:

Nitisinone Therapy: Nitisinone is a drug that inhibits the production of HGA. It has been shown to reduce HGA levels and slow tissue damage. However, it needs to be taken under close medical supervision because of potential side effects.

Low-Protein Diet: Since HGA is a byproduct of protein metabolism, reducing protein intake—especially foods rich in tyrosine and phenylalanine—may help decrease HGA production.

Pain Management: OTC pain relievers and anti-inflammatory medications can be used to relieve joint pain and stiffness.

Physical Therapy: Exercise regularly, as it may improve mobility and strengthen muscles, thus reducing strain on affected joints.

Surgical Interventions: Most people with alkaptonuria develop severe osteoarthritis necessitating joint replacement in their old age. Also, some may require heart valve replacement surgery if cardiovascular complications develop.

Life with Alkaptonuria

Although alkaptonuria is not fatal, it severely affects the quality of life. The progressive deterioration of the joints and associated symptoms can make everyday activities difficult, requiring lifestyle changes and medical interventions. The disease may cause premature aging of the joints, requiring walking aids and mobility assistance earlier than expected.

Ongoing research will continue to work on improving the treatment options by focusing on gene therapy and alternative enzyme replacement therapies. However, because of its rarity, the clinical trials and research remain sparse.

As genetic research advances, more hope for better management and possible curative approaches for alkaptonuria exists. Scientists are searching extensively for enzyme replacement therapies and innovative drugs that can target the root cause of the disorder. Being aware and being diagnosed early helps individuals better their condition and ultimately have better long-term health outcomes.

Alkaptonuria is a striking example of how one gene mutation can have widespread effects on the body. Though still a rare and often misunderstood condition, growing awareness and advances in treatment are paving the way for better care. If you or a loved one suspect symptoms of alkaptonuria, it is essential to seek early diagnosis and medical guidance to manage the disease effectively and preserve quality of life.

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Yoga Shows Promise for Anxiety Relief And Seizure Control In Epilepsy, Claims AIIMS Study

Updated Jun 12, 2026 | 04:48 PM IST

SummaryThe study found that yoga reduced the burden of epilepsy and improved the overall quality of life in epilepsy patients by reducing the perceived stigma.
Yoga Shows Promise for Anxiety Relief And Seizure Control In Epilepsy, Claims AIIMS Study

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Epilepsy is one of the most common neurological disorders and a leading cause of disability worldwide. Research has suggested that associated conditions, such as stigma, anxiety, and depression, can sometimes be more debilitating than the seizures themselves.

Stigma related to epilepsy can exist at both societal and individual levels, with many patients experiencing feelings of shame, fear, discrimination, and social isolation.

Now, research led by AIIMS New Delhi has suggested that yoga may help reduce epilepsy-related stigma while also improving seizure control. The 2023 study, published in Neurology, found that yoga-based interventions may offer benefits for both mental well-being and disease management.

“Yoga has been clinically proven to reduce the ‘felt stigma’ associated with epilepsy. By alleviating anxiety and improving both mindfulness and overall quality of life, mind-body interventions empower individuals to feel more in control and less socially isolated,” lead author Dr. Manjari Tripathi, Head of the Department of Neurology at AIIMS, told HealthandMe.

What Did the Study Find?

According to Dr. Manjari, the study identified three key benefits of yoga for people living with epilepsy:

  • Stigma Reduction: Patients who participated in a six-month yoga and psychoeducation program reported a significant reduction in perceived stigma compared with the control group.

  • Improved Seizure Control: The yoga intervention was associated with a higher rate of seizure reduction. "Participants were more than four times as likely to experience a greater than 50% reduction in seizures and were significantly more likely to achieve complete seizure remission," Dr. Manjari told HealthandMe.

  • Better Mental Health: Yoga practice was linked to lower anxiety levels, improved emotional regulation, and reduced cognitive impairment.

Also read: Yoga's Increasing Role As Great Soft Power And Preventive Healthcare: Ayush Secretary

Dr. Rajesh Sagar, Professor of Psychiatry at AIIMS, told HealthandMe that yoga reduced the burden of epilepsy and improved the overall quality of life in epilepsy patients by reducing the perceived stigma. The overall quality of life was also improved in the yoga group.

How Was the Study Conducted?

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Researchers conducted a randomized clinical trial involving 160 adults with epilepsy who were followed for six months. Participants were assigned either a structured yoga program or a sham yoga intervention, while both groups also received epilepsy-related psychoeducation.

The yoga program included loosening exercises , breathing techniques, meditation, and positive affirmations.

While the impact on seizure frequency was reduced compared with the control group, the researchers cautioned that larger studies are needed to conclusively determine the effect of yoga on seizure control.

Yoga For Mental Health

Further, mood disturbances have been common among people with epilepsy and often remain inadequately addressed, particularly in developing countries.

According to the researchers, yoga may offer a scalable and accessible option for helping patients manage these challenges alongside conventional treatment.

Dr. Rajesh further told HealthandMe that yoga has well-established benefits for mental health.

“Yoga is important in mental health care, and it has been found that the three important things, which are pranayama, that is, breathing techniques, asanas, that is, physical posture, and dhyana, that is, meditation, have a positive effect on anxiety and even depression, and also improve sleep".

He added that yoga can help reduce stress, improve mood, lower anxiety levels, and enhance sleep quality.

“There is substantial evidence from around the world showing that yoga can benefit people living with certain mental health disorders,” he said.

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Beyond The Cuff: Why Uncontrolled Hypertension Deserves Urgent Attention

Updated Jun 12, 2026 | 11:54 AM IST

SummaryHypertension affects approximately 1.4 billion adults worldwide. Studies suggest that almost 54% of Indian patients have uncontrolled hypertension even while taking ≥2 medications.
Beyond The Cuff: Why Uncontrolled Hypertension Deserves Urgent Attention

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Every morning, millions begin their day with a quick breakfast and blood pressure (BP) medication swallowed mechanically. But what happens when BP remains uncontrolled despite medicines? Uncontrolled hypertension is one of the most underestimated health threats. Often called the silent killer, it quietly damages the heart, brain, kidneys, and blood vessels.

The BP reading on the cuff captures only a visible measurement. BP that remains above goal over time despite treatment is concerning. Hypertension affects approximately 1.4 billion adults worldwide. Studies suggest that almost 54% of Indian patients have uncontrolled hypertension even while taking ≥2 medications. Thus, treatment does not necessarily mean control.

Why Does BP Control Matter?

Global organizations recommend stricter BP targets, aiming for readings below 130/80 mmHg or even 120 mmHg if tolerated. Studies show that each 10 mmHg reduction in systolic BP can decrease the risk of major cardiovascular events by 20%, stroke by 27%, heart failure by 28%, and death by 13%.

On the other hand, uncontrolled hypertension increases the risk of heart attacks, strokes, heart failure, end-stage kidney disease, type 2 diabetes, and death.

But What If The Numbers Don’t Change Despite Medication?

In persistently uncontrolled hypertension that other causes cannot explain, a hidden culprit called aldosterone is an under-recognized driver. Normally, aldosterone balances sodium and water to regulate BP.

However, in patients with uncontrolled hypertension, aldosterone production may remain abnormally high, causing sodium and fluid buildup, increasing BP.

Approximately 30% of patients with hypertension may have aldosterone dysregulation, and patients with resistant hypertension, obesity, type 2 diabetes, sleep apnea, and hypokalemia are at greater risk. Nearly 10–20% of patients with hypertension are treatment resistant, increasing their risk. In these patients, aldosterone dysregulation could be an important cause.

It is time to look beyond the cuff, as uncontrolled hypertension is a chronic, progressive, and often silent condition with serious consequences. Improving patient outcomes requires greater urgency, earlier intervention, better treatment optimization, and stronger awareness of underlying drivers such as aldosterone.

It is time to identify and treat the root causes of uncontrolled hypertension, so that patients can regain lasting BP control.

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Scientists Finally Have Answers To What Causes Inflammatory Bowel Disease

Updated Jun 11, 2026 | 05:00 PM IST

SummaryThe findings, published in the New England Journal of Medicine, suggest that inflammatory bowel disease is not a single condition but a group of biologically distinct diseases driven by different underlying mechanisms.
Scientists Finally Have Answers To What Causes Inflammatory Bowel Disease

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Inflammatory bowel disease (IBD), which includes Crohn's disease and ulcerative colitis, affects millions of people worldwide. The lifelong condition commonly begins in adolescence or early adulthood and can require repeated hospital treatment, long-term immunosuppressive medication, and, in some cases, surgery.

Despite advances in treatment, many patients cycle through multiple therapies without achieving lasting disease control, impacting their lives and costing healthcare systems millions.

Now, a team of UK researchers from the Universities of Oxford, Newcastle, and Cambridge has identified an important driver of inflammatory bowel disease (IBD).

The findings, published in the New England Journal of Medicine, suggest that inflammatory bowel disease is not a single condition but a group of biologically distinct diseases driven by different underlying mechanisms.

"Understanding what drives the inflammation provides a clear explanation for disease in this group of people and opens the door to new treatments that target the autoantibodies themselves or cells that produce those autoantibodies," said Professor Holm Uhlig, a pediatric gastroenterologist and director of the Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford.

What Did the Study Find?

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The researchers analyzed more than 4,900 patients with IBD and discovered that:

  • A substantial subset of patients shows autoimmune responses to one of the guardians of the immune system, interleukin-10 (IL-10), which leads to uncontrolled inflammation.
  • This damaging immune response is the mechanism for one of the strongest known genetic risk factors for IBD.

Antibodies that block interleukin-10 (IL-10), a cell-to-cell messenger that normally acts as one of the body's key controls on inflammation, effectively remove the immune system's natural "brake" on inflammation, allowing inflammatory responses to continue unchecked.

The researchers found high levels of anti-IL-10 neutralizing autoantibodies in the blood of about 3.5% of IBD patients, including those with Crohn's disease and ulcerative colitis, but not in healthy individuals. This could equate to 15,000–20,000 people with IBD in the UK carrying these autoantibodies.

The Genetic Link

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The researchers also found that the presence of these antibodies was strongly linked to carriage of a particular genetic variant known as HLA-DRB1*01:03.

The link between HLA-DRB1*01:03 and a severe form of inflammatory bowel disease was first identified by Oxford researchers 30 years ago.

The new findings show that people carrying this variant are far more likely to develop antibodies that block IL-10, helping explain how the gene contributes to disease.

What Could This Mean for Patients?

The researchers say the findings support the development of a blood test to identify this subgroup of patients, helping clinicians move quickly toward more appropriate treatment.

What Is IBD?

As per the Centers for Disease Control and Prevention (CDC), IBD refers to a group of lifelong diseases that affect your intestines. The main types of IBD are ulcerative colitis and Crohn's disease.

Ulcerative colitis affects the large intestine, while Crohn’s disease can inflame any part of the digestive tract. Both are lifelong conditions of unknown cause that trigger abdominal pain, diarrhea and other complications, with no known cure.

What Are The Symptoms Of IBD That People Usually Ignore?

  • Diarrhea or changes in bowel movements
  • Stomach pain
  • Fatigue
  • Nausea
  • Weight loss
IBD can also lead to overall health complications, such as

  • Dehydration
  • Increased risk of colon and rectal cancers
  • Low red blood cell count (anemia)
  • Reduced bone density
  • Joint pain
  • Skin changes
  • Eye irritation
  • Delayed or impaired growth in some children.

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