What Is Type 3 Diabetes? Insulin Resistance In The Brain That Could Trigger Alzheimer’s

Updated Dec 3, 2024 | 06:13 PM IST

SummaryDid you know type 3 diabetes, linked to insulin resistance in the brain, is associated with Alzheimer’s disease? It highlights how metabolic disorders can affect memory, cognition, and brain health.
What Is Type 3 Diabetes? Insulin Resistance In The Brain That Could Trigger Alzheimer’s

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.

What is Type 3 Diabetes?

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.

Symptoms of Type 3 Diabetes

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.

Causes of Type 3 Diabetes

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:

1. Insulin Resistance

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.

2. Type 2 Diabetes

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.

3. Environmental and Lifestyle Factors

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.

Treatments for Type 3 Diabetes

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.

Can Type 3 Diabetes Be Prevented?

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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50 Per Cent Preventable Cancers Caused By 2 Lifestyle Habits: Study

Updated May 26, 2026 | 01:07 PM IST

SummaryAir pollution, too, has recently contributed to a surge in lung cancer cases.
Drinking beer

Drinking alcohol is one of the risk factors for cancer. (Photo credit: iStock)

Cancer is one of the most dreaded diseases. It is characterised by a malignant tumor that obstructs the normal functioning of organs. According to a recent analysis from the World Health Organisation (WHO), more than a third of cancer cases in the world are preventable. Cervical, stomach, and lung cancers make up half of the cases. This implies that millions of such deadly cases in the world can be prevented with behavioural changes, timely medical intervention, reduced occupational risks, and an ability to tackle environmental pollutants. It turns out that most preventable cancers can be avoided by making two simple lifestyle changes.

Preventable cancers in the world

Researchers say that addressing preventable causes represents one of the most powerful opportunities to reduce the global cancer burden. The analysis also noted that, in 2022, there were approximately 19 million new cases of cancer, and 38 per cent were related to 30 modifiable risk factors. The most common modifiable risk factors are:

  1. High BMI
  2. Smoking
  3. Insufficient physical activity
  4. Alcohol intake
  5. Smokeless tobacco
  6. Air pollution
  7. Exposure to infectious agents
  8. Suboptimal breastfeeding
  9. Occupational exposures

What are the preventable risk factors for cancer?

The most common preventable risk factor, however, was smoking tobacco. It is associated with 15 per cent of all cancer cases in a year. In men, the risk was significantly higher. Smoking contributed to 23 per cent of the new cancer cases globally in men that year. However, smoking alone was not the only cause; air pollution, depending upon the region, played a huge role. In East Asia itself, 15 per cent of lung cancer cases in women were attributed to air pollution. In Western Asia and Northern Africa, 20 per cent of lung cancer cases in men were due to air pollution.

After smoking tobacco, the next key lifestyle risk factor was drinking alcohol. It accounted for 3.2 per cent of all cancer cases—approximately 7 lakh. As per researchers’ estimates, drinking alcohol and smoking tobacco account for about 48 per cent of all preventable cancer cases. Infections, however, were associated with 10 per cent of new cancer cases. Among women, the largest share of these cases was attributed to high-risk human papillomavirus (HPV), which contributes to cervical cancer cases. However, with the HPV vaccine being more accessible, cervical cancer cases have reduced.

Can smoking give you stomach cancer?

Stomach cancer cases are higher among men and are mostly associated with inadequate sanitation, smoking, infections, and poor access to clean water. A first-of-its-kind analysis, this study helps show how much cancer risk comes from preventable causes. By examining these patterns, countries can be alerted to work towards preventing cancers in the first place by taking appropriate steps.

Researchers also mentioned in their paper that 4 in 10 cancer cases in the world in 2022 could have been prevented by eliminating the risk factors considered in the study. The study was published in the Nature Medicine journal.

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Sleeping Up To 7.8 Hours Can Help Slow Biological Aging

Updated May 26, 2026 | 07:00 AM IST

SummarySleep is an essential aspect of one's life, and it can impact one's biological age as well. A recent study claims that both less and more sleep can cause fast biological aging.
Sleeping Up To 7.8 Hours Can Help Slow Biological Aging

Credit: iStock

Sleep is a very crucial part of one's life, and it can affect one's life as a whole. The sleep cycle and duration can determine a lot about one's physical and emotional well-being. Even biological aging is also immensely affected by the right amount of sleep, according to a recent study. The aforementioned research was published in Nature, and as per it, getting too little or too much sleep may speed aging in the brain and other body organs as well.

There were several studies that have been done on the same topic, and many of them concluded that getting less sleep can cause the speeding of one's biological age. Although this new study has come up with a new finding, and it went further than the previous studies on the same topic, the research shows that getting more sleep can also lead you to the same situation, and your biological aging speed can go higher due to it.

The lead study author, Junhao Wen, PhD, assistant professor of radiological sciences at Columbia University, said, “Sleep is fundamental for healthy aging and longevity. More importantly, it is potentially modifiable." He added, “In this study, we measure biological aging clocks across organs to link these clocks with sleep duration.”

The biological age is inherently different from chronological age, which is measured by the number of years one is alive, but on the other hand, biological age measures how quickly your cells and tissues are aging. Researcher Junhao Wen has done his research with different aging clocks, and these clocks are scientific, computational models that estimate a person’s biological age and how they are aging faster or slower than their chronological age.

Wen and his colleagues assessed the relationship between a person’s self-reported sleep duration and their biological age, using 23 aging clocks across 17 organs. The research defined too little sleep as less than 6 hours and too much sleep as more than 8 hours. The study concludes that, in general, people who slept too little or too much showed signs of faster biological aging than those who reported sleeping between 6.4 and 7.8 hours each day.

The same study also sheds light on the relationship between sleep and chronic diseases. The research suggests that a connection exists beyond brain influence. Notably, less sleep causes disorders like depression and anxiety disorders. Other possible conditions related to it are obesity, type 2 diabetes, hypertension, ischemic heart disease, and heart arrhythmias. On the other hand, longer sleep is associated with depression and illness.

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Magic Mushroom: Study Claims Psilocybin Gives Relief From Pain?

Updated May 26, 2026 | 12:00 AM IST

SummaryMagic mushrooms are famous because of a compound that is naturally found in the fungus. The compound is called Psilocybin, which can reduce nerve pain very quickly and for a long duration with only one dose.
Magic Mushroom: Study Claims Psilocybin Gives Relief From Pain?

Photo Credit: iStock

Magic mushroom, a fascinating name, but the reason behind this naming is solely due to an active compound in that fungus called psilocybin. Notably, a single dose of it can easily reduce the nerve pain for months, thus has wide and effective use in painkillers according to a study recently done by the researchers from the University of Reading. This crucial study was published in Communications Biology.

The researchers used rats as test subjects to find this information. They injected psilocybin into mice with nerve damage. But within two hours, researchers found that the pain-relieving effect of psilocybin starts to relieve the pain in mice that had excruciating pain due to nerve damage. Though this was by no means the biggest finding of the study, it was also seen that the effect of the compound lasted for several weeks.

How Does Psilocybin Work As A Pain Reliever?

There is a very interesting explanation behind the long-lasting effect of Psilocybin. The active compound does not block the pain signal to the brain like other common pain relievers; instead, Psilocybin is likely to restructure the way the brain's pain-processing networks operate, which in turn ensures long-lasting effects of the compound even long after it exits the body.

What Is The Most Significant Finding Of The Study?

The study finds a great connection of mutual compatibility between psilocybin and gabapentin. Notably, gabapentin is a well-known drug commonly prescribed for nerve pain. In the aforementioned study, the researchers noticed that when gabapentin was given along with psilocybin, it produced pain relief lasting up to four days, but the effect when gabapentin was given alone was far weaker.

Dr Maria Maiarú, senior author from the University of Reading, said, "Millions of people live with nerve pain that their medication simply does not control well enough, and the medicines we do have can cause serious side effects or lead to addiction. What is exciting here is that psilocybin does not just reduce pain on its own. It appears to reset the brain's pain networks in a way that makes existing treatments significantly more effective. For patients who have run out of options, that could be genuinely transformative."

What Are The Other Crucial Findings In The Research?

Although initially the tests were done on the male mice, later on, the same compound was also injected into the bodies of female mice, and in both cases, the effect was complete success in achieving pain relief. The whole study was done with the aim of minimizing distress by using the 3Rs principles of Replacement, Reduction, and Refinement.

Why Is It called A Magic Mushroom?

The name is the direct result of its active compound, Psilocybin, which, when injected, can cause dream-like hallucinations, euphoria, and profound shifts in perception, mood, and consciousness.

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