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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For many long-term cannabis users, the usual jokes about the munchies feel far removed from reality. Over recent years, emergency rooms have reported a steady rise in regular smokers arriving with sudden bouts of severe stomach distress that leave them curled up and unable to function. What makes it more troubling is that these episodes return several times a year, often leaving both patients and clinicians unsure of what is going on.
The source of the problem is cannabis hyperemesis syndrome (CHS), a difficult condition marked by unrelenting nausea, strong abdominal cramps and repeated vomiting that can occur four or five times an hour, according to the Cleveland Clinic.
Symptoms usually appear within a day of cannabis use and can linger for several days. These episodes can be so overwhelming that emergency staff have adopted the term “scromiting,” a blend of screaming and vomiting that captures how distressing it can be.
Although cases have become more common, many healthcare workers are still relatively unfamiliar with CHS because it was only identified in recent years. This makes it easy to confuse with other illnesses such as foodborne infections or stomach bugs.
“A person often will have multiple emergency visits before the condition is correctly identified, which can be very costly,” said Dr. Beatriz Carlini, a research associate professor at the University of Washington School of Medicine who studies the health risks linked to cannabis. Once a diagnosis is made, managing the condition can still be a challenge.
There are no approved treatments at present, and many standard nausea medications fail to bring relief, explained Dr. Chris Buresh, an emergency medicine physician with UW Medicine and Seattle Children’s Hospital.
This often pushes doctors to try less common options, including Haldol, a drug usually used to manage psychosis. Some people experience temporary improvement from applying capsaicin cream to the abdomen, as the warming sensation can help lessen discomfort for short periods.
Hot baths and showers are another frequent source of relief. Many patients report staying in the bathroom for long stretches to calm their symptoms.
“That is often something that helps confirm the diagnosis for me,” Buresh said. “People say a hot shower is the only thing that brings any comfort, and they end up using all the hot water in the home.”
Once the worst phase passes, long-term improvement is not always straightforward. Because CHS comes and goes, some cannabis users assume an episode was caused by something else and continue smoking, only to fall ill again, according to UW researchers.
Even for those who accept the diagnosis, quitting cannabis can be difficult due to dependence, which prolongs the cycle of nausea and vomiting, Carlini said. The only known cure is to stop cannabis use entirely.
Researchers still do not know the exact biological cause of CHS. The leading idea is that years of heavy cannabis use overstimulates receptors within the endocannabinoid system, which may disrupt the body’s usual control over nausea and vomiting, as outlined by the Cleveland Clinic.
Why this affects certain users and not others remains unclear. “We do not yet know if it is tied to wider access to cannabis, higher THC levels, or something else entirely,” Buresh said.
“There seems to be a point at which people become vulnerable to this condition, and that point varies from person to person,” he added. “Even small amounts of cannabis can trigger vomiting once someone crosses that threshold.”
A study released earlier this year by George Washington University researchers examined 1,052 people with CHS to learn more about potential risk patterns.
The findings showed that those who began using cannabis at younger ages were more likely to return to the ER with hyperemesis episodes. Many reported daily use and long-term consumption, with 44 percent using cannabis regularly for more than five years before symptoms began.
CHS is not limited to adults. Data shows that emergency visits among American adolescents have increased more than tenfold between 2016 and 2023. While overall rates tend to be higher in states where recreational cannabis is legal, the sharpest year-to-year rise in adolescent CHS cases has been recorded in states where recreational use is still against the law.
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Every year on December 1, World AIDS Day reminds us that HIV continues to be a global concern, and in 2025 the focus is on "Overcoming disruption, transforming the AIDS response. Early testing and treatment are key to making that transformation real. The sooner HIV is detected and treated, the better the long-term health outcomes. India has made notable progress.
According to 2023 estimates, adult HIV prevalence is around 0.2%, and prevention and treatment programmes using medication continue to expand. Still, challenges remain: gaps in testing, delayed diagnoses, and interruptions in care persist—issues World AIDS Day 2025 urges us to address.
HIV is still a very real health concern today. It can affect anyone, students, professionals, or those in stable relationships—especially if needles or syringes are shared or protection is not used.
Once HIV enters the body, it gradually weakens the immune system. If left undetected and untreated, it can progress to AIDS, leaving even minor infections dangerous. The good news is that this progression can be prevented. With early testing and proper treatment, people living with HIV can lead full, healthy, and normal lives.
Dr. R K Gattani, Senior Consultant Physician at Kailash Hospital & Heart Institute, Noida, says, "Early testing is an important form of self-care. Choosing to get tested shows you are taking responsibility for your health—it doesn’t mean something is wrong."
Meanwhile, Dr. Vaibhav Gupta, Senior Consultant in Internal Medicine, Critical Care, and Diabetology at Regency Health Kanpur, adds, "Detecting HIV early allows doctors to begin Antiretroviral Therapy (ART) straight away, keeping the immune system strong, preventing AIDS, and reducing transmission risk almost to zero. In a world where millions are diagnosed each year, early recognition is one of the strongest tools young Indians have to protect themselves and their partners."
Today’s ART enables people diagnosed early to live long, healthy, and productive lives. It keeps the virus under control, safeguards the immune system, and dramatically lowers the chance of passing HIV to others. Early diagnosis also gives young people the knowledge to make safer lifestyle choices.
Dr. Aabid Amin Bhat, Medical Director at Ujala Cygnus Group of Hospitals, explains, "Encouraging open discussions, expanding access to youth-friendly testing, and fighting stigma are essential steps. When HIV is found early, it’s not the end; it’s the start of informed care, timely treatment, and a healthier future."
The challenge is that early HIV symptoms often look like common illnesses like fever, fatigue, sore throat, swollen lymph nodes, and rashes—which can be easily ignored. Without prompt testing, the virus may advance silently, making treatment more complex. Early testing also opens doors to preventive options like post-exposure prophylaxis (PEP), which can prevent infection if taken within 72 hours of potential exposure. Recognizing early signs and seeking confidential, judgment-free testing allows young Indians to stop HIV before it develops into AIDS, turning a potentially life-altering diagnosis into a manageable condition.
HIV prevention is simpler than many think. Basic precautions like using protection during intimate contact, avoiding sharing needles or items that could contact blood, and staying informed about your health—make a huge difference. Anyone who may have been exposed should immediately consult a healthcare professional for guidance. Above all, don’t hesitate to get tested, ask questions, or seek help. Taking care of your health is the most responsible and empowering way to protect your future. People living with HIV, when on proper treatment and taking necessary precautions, should not automatically be seen as a risk to others.
Education and awareness remain key. Safe practices, timely diagnosis, and access to treatment can transform HIV from a feared disease into a manageable condition, giving young Indians control over their health and future.
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World AIDS Day is marked across the globe every year on 1 December to draw attention to HIV and AIDS. In India, the day is observed through awareness drives and community-level programmes held nationwide. The National AIDS Control Organization (NACO), which functions under the Ministry of Health and Family Welfare, leads these efforts and brings people together to support the ongoing battle against the illness.
This year, the government reported a strong decline in HIV cases, noting 49 per cent fewer new infections since 2010, an 81 per cent fall in deaths linked to AIDS, and a 75 per cent drop in mother-to-child transmission between 2010 and 2024.
The update, shared on Sunday for World AIDS Day 2025, also underlines how myths continue to harm people living with HIV. Misconceptions remain widespread, including the belief that the virus spreads through simple physical contact.
The Human Immunodeficiency Virus (HIV) harms the body by attacking helper T-cells, which are vital for immunity. Acquired Immunodeficiency Syndrome (AIDS) develops when these cells fall to very low levels, leaving the body exposed to infections and diseases, as described by the Mayo Clinic.
World AIDS Day, observed each year on December 1, is a time to pause, acknowledge and renew our commitment. It pays respect to those who lost their lives to AIDS-related illnesses, offers support to people living with HIV and reminds the world that prevention, treatment and rights-based care remain essential. The theme for 2025, “Overcoming disruption, transforming the AIDS response”, urges countries to build stronger systems, widen access to services and uphold the dignity of all communities affected by HIV.
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