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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Mood Swings, Anxiety & Brain Fog During Menopause? Expert Recommends Looking Beyond Hot Flashes

Updated Jul 19, 2026 | 07:00 PM IST

SummaryPerimenopause and menopause cause a number of symptoms beyond hot flashes. Doctors advise not ignoring mental health signs like anxiety, mood swings and brain fog due to hormonal changes.
Mood Swings, Anxiety & Brain Fog During Menopause? Expert Recommends Looking Beyond Hot Flashes

Credit: AI

People think of menopause as just hot flashes and irregular periods, but menopause is more than that.

Perimenopause and menopause can bring a host of emotional and cognitive shifts for many women, including mood swings, anxiety, easily irritated, trouble sleeping, or having what some refer to as “brain fog.”

What Is Perimenopause?

Perimenopause is the period leading up to menopause that can last anywhere from two to eight years. This is when hormonal changes take place, especially a drop in estrogen.

These hormonal changes also impact neurotransmitters like serotonin and dopamine that are essential for mood, memory, sleep and emotional wellness.

Consequently, a woman can suffer from forgetfulness, lack of concentration, mental tiredness, low energy levels, dry skin, loss of libido and less productivity.

Brain Fog During Menopause

Also read: Shamita Shetty’s Endometriosis Diagnosis Sparks Concerns About Risks Of Delayed Detection

Brain fog can be a frustrating and overwhelming experience during menopause, particularly if a woman is juggling her career, family, ageing parents and personal obligations.

Many women suffer from anxiety symptoms, even if they have no mental health background. Hormonal changes, poor sleep and stress can exacerbate these symptoms.

But not all symptoms are due to the menopause or "normal ageing". Thyroid disorders, vitamin deficiencies, depression and other medical problems can have similar symptoms.

Therefore, if symptoms start to impact life, work, relationships or emotional wellbeing, it is important to seek medical advice and have a proper health check-up.

How To Manage It?

Management is often comprehensive, and may involve lifestyle modifications. Regular exercise, balanced nutrition, stress management and healthy sleep patterns.

In a few instances, you may additionally be suggested to take Menopausal Hormone Therapy (MHT). As more research is done and preparations of lower doses and greater safety, earlier misconceptions about hormone therapy are gradually decreasing.

Medically, women can make a difference in their quality of lives and manage menopause with greater physical, mental and emotional wellness with early recognition and timely intervention.

By Dr. Nidhi Sharma Chauhan, Gynaecologist, Saifee Hospital

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Besides Sunscreen, What Everyday Habits Can Help Reduce Sun Exposure And Skin Damage?

Updated Jul 18, 2026 | 11:00 PM IST

SummarySunscreen is essential, but healthy skin also depends on daily habits like moisturizing, staying hydrated, eating antioxidant-rich foods, protecting yourself with hats and clothing, maintaining gut health, and supporting skin repair.
Besides Sunscreen, What Everyday Habits Can Help Reduce Sun Exposure And Skin Damage?

Credit: AI

Everyone knows that using sunscreen is one of the most important steps for protecting the skin from harmful sun rays, but dermatologists explain that it isn't the only thing you should do to keep your skin healthy. Other daily routines are also important for minimizing sun damage and maintaining healthy skin over time.

Protecting The Skin Barrier

Skin is a protective barrier for the body but constant exposure to the sun, pollution, heat and unhealthy lifestyle habits can make this barrier vulnerable.

Once the skin barrier is damaged, the skin is more susceptible to tanning, pigmentation, dryness, sun ageing and other sun damage.

Moisturising Supports Skin Health

Using a moisturiser every day is a very simple, yet effective habit. A good moisturiser is one that doesn't contain any scents and will support the barrier function of the skin, thereby preventing unwanted water loss from the skin.

Wet and plump skin is resistant to the environment and sun's rays.

Also read: Add These 8 Foods To Your Diet For Batter Hair, Skin And Nails

Antioxidants Help Fight Sun Damage

Antioxidants are also a best practice for dermatologists. Antioxidants prevent the damage to skin cells by free radicals created by UV exposure, pollution etc.

This protection can help minimize issues like hyperpigmentation, uneven skin tone and premature ageing. Consuming foods that contain antioxidants (such as fruits, vegetables and nuts) can help keep skin healthy on the inside.

Stay Hydrated For Healthier Skin

Next, hydration is crucial. It's important to keep drinking enough water all day long to keep the skin supple and to allow the skin to repair itself. Moisture also contributes to skin's healing from environmental stress.

Physical Sun Protection Matters

Sun protection is also of great importance. Wearing hats or caps, using umbrellas, and wearing clothing that protects against the sun's rays can minimize direct exposure to the sun.

All these are simple actions that serve as a physical barrier and prevent sunburn and long term damage to the skin, particularly between 10 a.m. and 4 p.m. These simple steps provide a physical barrier and reduce the risk of sunburn and chronic skin damage, particularly in the peak hours of 10 a.m. to 4 p.m.

Also read: Dermatologist Reveals What To Add And Remove From Skincare Routine For Season Change

Gut Health And Skin Connection

Another focus has been on the connection between gut health and healthy skin, as experts recognize how crucial the role of the gut is in maintaining healthy skin.

Probiotics can potentially improve the gut-skin axis and aid in the healing process and alleviate inflammation in the body. The better the gut environment, the better the skin will be able to recover and the less the exposure to the sun will age the skin.

Collagen May Support Skin Repair

Some people can use collagen supplements as an added benefit. Collagen is involved in supporting the dermis, the skin's structural component. Keeping collagen high can help promote skin repair and healing mechanisms.

Doctors say while sunscreen is important, long-term skin protection can be achieved through a variety of healthy habits, proper nutrition, hydration and physical sun protection measures, which must be followed daily.

Dr. Pravin Banodkar Senior Consultant Dermatologist Saifee Hospital

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6 Everyday Moments When Your Eyes Work Harder Than You Realize

Updated Jul 18, 2026 | 07:00 PM IST

SummaryYour eyes work harder than you realize during everyday activities. Simple habits and regular eye care can help reduce strain and protect vision.
6 Everyday Moments When Your Eyes Work Harder Than You Realize

Credit: AI

We tend to think of our eyes as easy – they just "see", and we go about our day. But the fact is, your eyes are adapting a lot, focusing and straining all the time, far more than you realize. Many of these moments are utterly unremarkable, but they build up gradually into a tiredness, a dryness and a long-term strain.

We see many people who are shocked to find out how hard their eyes had been working long before any symptoms appeared. Here are six common situations that deserve a whole lot more attention – and care – from your eyes.

Staring at Your Phone First Thing in the Morning

Having a quick glance at notifications before even leaving bed requires your eyes to adjust to a small, bright screen in the dark. This quick change puts a load on the eye muscles and can make them tire before your day has really started.

Long Hours in Front of a Computer

Working, studying, and hopping from meeting to meeting: extended hours in front of the screen drastically lower your usual blink rate. Less blinking equals less lubrication, which is why so many people are dry, irritated and have blurry vision by the afternoon.

Driving at Dusk or Night

Night driving is one of the most challenging visual jobs humans undertake, given low light, incoming headlights and the need to constantly change focus between the road, mirrors and dashboard. Your eyes are working tirelessly to shift between bright and dim situations in fractions of a second.

Night driving is one of the most challenging visual jobs humans undertake, given low light, incoming headlights and the need to constantly change focus between the road, mirrors and dashboard. Your eyes are working tirelessly to shift between bright and dim situations in fractions of a second.

Also read: El Salvador Becomes First Country In Central America To Eliminate Trachoma: WHO

Reading Fine Print

Poorly lit restaurant menus, pharmaceutical labels, or the small text on a contract all demand that you focus hard at close range, frequently in less-than-ideal illumination. As we get older, this type of near-focus strain is very common since our natural ability to focus declines.

Switching Between Multiple Screens

Glancing from your laptop to your phone to a television and back again, it makes your eyes refocus at multiple distances. It is easier, but this continual flipping is more tiring than looking at one screen for the same period of time.

Stepping Out Into Bright Sunlight Into Bright Sunlight

Your eyes work hard to adjust while you move from a dim room into harsh daylight — or vice versa. Over time, repeated exposure to glare without the correct protection (such as sunglasses) can add unneeded strain.

None of these moments feel dramatic on their own, but together, they represent a significant daily workload for your eyes. The good news is that habits such as the 20-20-20 rule, correct lighting, regular blinking and eye check-ups can go a long way in reducing this concealed tension. We believe that awareness is the beginning of healthy eyesight.

If you are suffering frequent eye strain, dryness or fuzzy vision, it may be time to schedule a full eye exam. Your eyes work harder than you realize – let’s give them the attention they deserve.

Dr Mandeep Singh Basu, Ayurvedic Eyecare Expert, Dr Basu Eye Care Centre

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