What Is Type 3 Diabetes? Insulin Resistance In The Brain That Could Trigger Alzheimer’s
Most people are aware of type 1 and type 2 diabetes, but did you know there is a type 3 diabetes as well! It is a more obscure term. Although it is not an accepted medical diagnosis, type 3 diabetes has been discussed in the literature as a possible relationship between insulin resistance in the brain and Alzheimer's disease. This link has been described to help explain how metabolic disorders impact brain health, causing cognitive decline and dementia.
Type 3 diabetes is more of a misnomer because it should not be confused with type 3c diabetes, which relates to pancreatic dysfunction. The term "type 3 diabetes," on the other hand, has been loosely used by some scientists to analogously propose that Alzheimer's disease is strongly implicated with insulin resistance in the brain.
This concept was conceptualized by Dr. Suzanne de la Monte and Dr. Jack Wands of Brown University in the year 2008. This hypothesis postulated that Alzheimer's disease may be called type 3 diabetes for it bears many similarities with glucose metabolism disorder type 2 diabetes. Their concept arises from the basic principle that insulin is fundamental to blood sugar regulation, but it is also the case with the brain. When brain cells become insulin-resistant, they lose access to glucose, impairing their function.
Research published in the Journal of Diabetes Science and Technology supports this hypothesis by indicating that insulin resistance can be a significant contributor to the occurrence of dementia, also referred to as Alzheimer's. The symptoms of memory loss and diminished reasoning are associated with impaired glucose metabolism in the body, especially in the cerebral tissue.
Although type 3 diabetes is not a "medical term," its symptoms correlate well with Alzheimer's diseases that are known to reduce the ability to think in an efficient manner and bring down brain health. These signs are:
- Loss of memory, especially short-term.
- Poor judgment and judgment ability
- Failure in recognizing people or places familiar once.
- Failure in the process of reading, writing or processing numbers
- Anxiety, agitation, or mood changes.
- Disorganized thoughts or confusion
- Lack of impulse control
As the disease advances, patients may be afflicted with severe complications including an inability to swallow or control their bodily functions. In the final stages, most patients die from fatal complications such as aspiration pneumonia.
This may not be well understood with regards to type 3 diabetes, or the exact link between insulin resistance and Alzheimer's disease. Some identified contributing factors include the following:
Insulin acts as an important regulatory mechanism of brain functions such as memory and cognition. The reduction in insulin signaling may impair metabolism of brain cells, thus bringing about neurodegeneration.
These diseases show a strong relationship and those individuals diagnosed with type 2 diabetes have double chances of getting Alzheimer's. In the two, the main causes can be chronic inflammation, oxidative stress, and a defect in glucose metabolism.
Insulin resistance associated with obesity, stress, and an unhealthy diet is considered a cause that may increase the chances of Alzheimer's disease.
Researches in Frontiers in Neuroscience and The Lancet Neurology have also highlighted that drugs used for antidiabetic medication may be crucial for the prevention or at least slowing down the course of Alzheimer's.
In 2022, in a study in Pharmaceuticals, researchers studied biomarker uptake in brain regions implicated in the faulty uptake and metabolism of blood sugar in Alzheimer’s patients.
Emerging Therapies
Research into such treatments as intranasal insulin has also been promising. Intranasal delivery of insulin directly to the brain has been reported to enhance glucose uptake by brain cells, improve memory, and boost cognitive performance. While such clinical trials have been shown to be successful, additional research is needed for safety and efficacy.
Medications
For patients being aggressive or agitated, antipsychotic drugs may be prescribed; however, therapies such as cognitive rehabilitation as well as cognitive stimulation therapy serve to preserve memory and executive function.
Lifestyle Interventions
Diet, exercise, and stress management are critical in preventing and managing insulin resistance. A review in the Journal of Alzheimer's Disease also highlighted the benefits of Kirtan Kriya meditation, which can regulate genes involved in insulin and glucose metabolism, improve sleep, and reduce inflammation.
Although type 3 diabetes is not officially recognized, its connection to Alzheimer’s disease underscores the importance of proactive measures for brain health. Some prevention strategies include:
1. Healthy Diet
Consuming a balanced diet rich in antioxidants, whole grains, and healthy fats may support brain health.
2. Regular Exercise
Physical activity improves insulin sensitivity, reduces inflammation, and enhances overall metabolic health.
3. Stress Reduction
Mindfulness practices, including meditation, have been shown to lower stress levels, which can reduce the risk of cognitive decline.
The term type 3 diabetes brings out the complex relationship between metabolic disorders and brain health. Even though it is not a recognized medical condition, the concept emphasizes the crucial role of insulin in brain function and its possible contribution to Alzheimer's disease. Continued research will hopefully provide hope for therapies such as intranasal insulin and lifestyle modifications.
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Dehydration is a serious concern for people fasting during the month-long Ramadan period, and can severely impact kidney and prostate health. Experts suggested that avoiding excess salt and caffeine can help.
While Ramadan fasting is generally safe for people with early-stage chronic kidney disease (CKD), maintaining adequate hydration between iftar and sehri -- the two important meals each day for faithful observing the fasting -- is of significant importance.
Dehydration can lead to acute kidney injury and electrolyte imbalances for individuals with advanced CKD. As prolonged fasting hours -- more than 12 hours a day -- urine becomes concentrated, increasing the risk for kidney stones and Urinary Tract infections (UTIs).
For men with prostate problems, fasting during Ramadan can pose challenges, such as Benign Prostatic Hyperplasia (BPH) or an enlarged prostate, primarily due to dehydration.
“As a practicing urologist and kidney transplant surgeon in India, I often notice a rise in kidney stone pain and urinary infections during Ramzan. When patients fast for long hours -- especially in our warm climate -- urine becomes highly concentrated. That increases the risk of stones and UTIs. Men with prostate enlargement sometimes report worsening urinary flow because they consciously reduce fluid intake,” Dr. Pankaj Panwar, Additional Director, Urology, Fortis Escorts Okhla, New Delhi, told HealthandMe.
The doctor advised people “to hydrate strategically between Iftar and Sehri, avoid excess salt and caffeine”.
Consuming high-sodium foods such as processed meats, pickles, salty snacks, and fast food during iftar or sehri can increase thirst and dehydration.
High salt intake forces the body to pull water from cells to dilute the sodium, leading to severe thirst. It can also lead to bloating.
Similarly, caffeine in coffee, tea, chocolate, and energy drinks can be diuretic and cause the body to lose fluids and salts through increased urination. Particularly, drinking coffee or tea at sehri -- the pre-dawn meal -- can lead to faster dehydration during the day.
Caffeine consumption, especially late in the evening, can also interfere with sleep, making it harder to wake up for sehri.
“Ramzan is a sacred month of fasting, but prolonged abstinence from water, especially in hot climates, can increase dehydration risk. Concentrated urine puts stress on the kidneys and may worsen kidney stones or trigger urinary tract infections,” Dr. Mangesh Patil, Urologist at Saifee Hospital, Mumbai, told HealthandMe.
Dehydration during Ramadan fasting can lead to symptoms like headaches, extreme thirst, fatigue, and dizziness. But in case of severe dizziness, fever, confusion, or blurred vision, the experts warned of immediate medical help.
“Do not ignore warning signs like flank pain, fever, or difficulty passing urine. A little planning can prevent an emergency hospital visit,” Panwar said.
Patil said warning signs include severe flank pain, burning urination, fever, vomiting, blood in urine, or reduced urine output. Men with Benign Prostatic Hyperplasia may notice worsening urinary symptoms.
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Colon (colorectal) cancer begins when small growths called polyps form on the inner lining of the colon or rectum. Over time, changes in the DNA of these cells can cause the polyps to become cancerous.
As abnormal cells multiply, they replace healthy cells and eventually form a mass known as a tumor. This process develops slowly, often taking up to ten years for a precancerous polyp to turn into cancer and begin showing symptoms.
Colon cancer poses serious health risks because cancerous cells can invade healthy tissues. Over time, they may break away and spread to other parts of the body, making detection more difficult since the symptoms can resemble other conditions.
Colon cancer can be difficult to detect because it often develops without obvious symptoms. However, doctors emphasize that the number one warning sign is rectal bleeding or blood in your stool.
"Colon cancer can be hard to diagnose because it can develop asymptomatically,” said Dr. John Nathanson, a gastroenterologist at New York-Presbyterian Allen Hospital.
Dr. Pratima Dibba adds that this symptom should not be misdiagnosed as hemorrhoids, infection, or constipation, since early signs of colon cancer can look similar.
She urges patients to get checked promptly to rule out serious conditions.
Research from the Cleveland Clinic also shows that blood in stool can originate anywhere in the gastrointestinal tract, including the colon.
Detecting colon cancer early is critical, as survival rates can be as high as 90 percent when caught in its initial stages.
Persistent changes in bowel habits (diarrhea, constipation, or narrowing of stool). Other signs include:
Colorectal cancer (CRC) is a major health concern worldwide. In India, it is the fourth most common cancer among both men and women. In 2022, there were 64,863 new cases and 38,367 deaths.
Projections suggest that incidence will continue to rise by 2026, reflecting both lifestyle changes and improved detection.
Compared to developed countries, survival rates in India remain lower, largely due to late-stage diagnosis and limited access to screening programs.
The American Cancer Society notes that colorectal cancer is a cancer that starts in the colon or the rectum. Colorectal cancer impacts around 1.9 million people every year, noted the World Health Organization (WHO) as per its 2022 data.
Some of the risk factors include risk factors involve being over the age 50, family history, certain genetic syndromes (like Lynch syndrome), inflammatory bowel diseases, and lifestyle factors (diet high in red meat, alcohol, smoking, inactivity).
The most effective way to prevent colorectal cancer is through annual colonoscopies, screening and stool tests.
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Alcohol use problems are far more common in people living with borderline personality disorder than many clinicians may assume. A large meta analysis has found that more than half of individuals diagnosed with the condition also struggle with alcohol use disorders. The finding strengthens calls for mental health care that treats both issues together rather than separately.
Borderline personality disorder, often called BPD, is a complex psychiatric condition marked by intense emotional swings, impulsive behavior, unstable relationships, and a fragile sense of self. Many people with BPD experience overwhelming emotional distress and may turn to alcohol as a way to cope, calm themselves, or escape difficult thoughts.
For years, research has hinted at a strong connection between BPD and substance misuse. However, the actual scale of the problem has been unclear because individual studies reported very different numbers. Some suggested moderate overlap while others pointed to extremely high rates.
Alcohol misuse in BPD is not just a side issue. It can worsen mood instability, increase the risk of self harm, and make therapy harder to stick with. People may miss appointments, struggle with medication routines, or act more impulsively while intoxicated. This makes understanding the true prevalence important for both diagnosis and treatment planning.
To clarify the picture, researchers reviewed 15 studies including 15,603 adults diagnosed with borderline personality disorder. The team analyzed data collected across multiple countries and databases up to March 2024 using established systematic review methods.
The results were striking. About 55.28 percent of people with BPD had an alcohol use disorder. Around 44.59 percent met criteria for alcohol dependence and 18.84 percent for alcohol abuse.
When compared with the general population, the contrast becomes sharper. Alcohol use disorders occur in roughly 8.6 percent of men and 1.7 percent of women overall. The prevalence in BPD is therefore dramatically higher.
In simple terms, alcohol related conditions are not occasional in BPD. They are common and clinically significant.
The findings suggest that mental health services cannot treat borderline personality disorder in isolation. Screening for alcohol misuse should become routine during psychiatric assessment. Likewise, addiction services should look for underlying personality disorders rather than focusing only on drinking behavior.
Integrated treatment approaches are likely to work better. Therapy that addresses emotional regulation, impulsivity, and coping skills alongside addiction support may reduce relapses and improve long term outcomes.
Early identification is key. When both conditions are recognized together, patients are more likely to stay engaged in care and avoid severe complications. The research ultimately highlights a simple but important point. For many patients, recovery depends on treating the person as a whole, not just the diagnosis they first walk in with.
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