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.
Credit: AI generated image
While HPV vaccines are most known for preventing cervical cancer, a top US doctor says they can also help curb the rising incidence of head and neck cancers.
According to Mikkael A. Sekeres, Chief of the Division of Hematology and Professor of Medicine at the Sylvester Comprehensive Cancer Center at the University of Miami, Human papillomavirus (HPV) — the same sexually transmitted virus that can infect the genital area and lead to cervical cancer — is now the greatest risk factor for head and neck cancer.
Writing in The Washington Post, Sekeres noted that HPV accounts for about 30 per cent of oropharyngeal cancer worldwide.
HPV is believed to be responsible for the recent rise in head and neck cancers, which include malignancies affecting the mouth and throat (oral cavity and pharynx), voice box (larynx), sinuses and nasal cavities, and salivary glands.
Sekeres said the US records about 60,000 new cases of head and neck cancers each year, while the global incidence is expected to rise by 30 per cent by 2030.
The expert noted that men develop oral cavity and pharynx cancers at approximately 2.5 times the rate of women.
Major risk factors include:
Also read: PM Modi Launches Nationwide Free HPV Vaccination Drive; A Landmark Step, Says WHO
The Centers for Disease Control and Prevention (CDC) estimates that the high-risk HPV subtypes most associated with head and neck cancers are detectable in the mouths of 4 per cent of adults aged 18 to 69.
While a pap test detects early-stage cervical cancer in women, no such test exists for penile, anal, or head and neck cancers in men, which can worsen their survival rate.
Thus, Sekeres said: “The best way to prevent the most common types of HPV is through vaccination, with two doses of the vaccine recommended for children at age 11 or 12, or starting as early as 9 years and up to age 26 for those who missed it as a child".
He noted that although the vaccine is approved for use up to age 45, it is generally less beneficial after age 26 because many individuals may have already been exposed to HPV. However, doctors can help determine whether vaccination may still be beneficial for adults.
Earlier this year, the European Cancer Organization also urged broader HPV vaccination regardless of gender.
“HPV affects everyone, regardless of gender. It can lead to cancers of the cervix, mouth and throat, anus and penis. This is why universal protection is so important,” the organization said in a social media post.
Read More: Who Needs HPV Vaccine? Guide For Every Parent, Teen And Adult
A 2026 study published in JAMA Oncology found that boys and men who received the HPV vaccine between the ages of 9 and 26 were nearly 50 per cent less likely to develop cancers of the head and neck, esophagus, anus, or penis.
The findings, based on data of more than 510,000 boys and men, highlight the importance of vaccinating all children and adolescents against HPV, said Taito Kitano, first author of the study and a researcher at Nara Prefecture General Medical Center in Japan.
“Children, adolescents, parents and health care workers should be more informed about the expected benefits of the HPV vaccine, not just cervical cancer,” Kitano said.
Credit: Emma Barnett/ Instagram
UK-based journalist Emma Barnett said it took 21 years to receive a diagnosis of endometriosis, a chronic condition in which tissue similar to the uterine lining grows outside the womb.
The condition, which causes severe pain and other complications, affects one in 10 women. However, diagnosis remains difficult and is often dismissed as merely “painful periods”.
“It’s a disease that has outwitted doctors and researchers around the world. No one knows what causes it. No one knows how to cure it. At least 1 in 10 women are staggering about with it,” Barnett shared in a post on Instagram.
“Endometriosis may not typically kill women, but it’s a living death for many. It is a silent medical emergency,” she added.
The 41-year-old BBC journalist said: “It’s a scandal it takes nearly 10 years to be diagnosed — in my case 21 years.”
There is currently no cure for endometriosis. Available treatments include hormone therapy, predominantly the contraceptive pill, to manage symptoms, or surgery, including hysterectomy in severe cases.
“I’ve been suffering from the condition — in which tissue similar to the womb lining, that’s meant to leave your body, grows and builds outside the uterus — since my periods started at the age of 10. But it would be more than 20 years until I’d be diagnosed at 31, after two years of trying to get pregnant naturally, which meant more than 20 years of enduring excruciating, bone-grinding pain without ever having a label for it,” she wrote in Women's Health magazine.
She described the pain “as a drilling sensation from my pelvis that travels down my legs — making them feel as though I can’t lift them to go up the stairs. Sometimes, the hurt spreads to my arms or chest, and comes with crippling nausea and loss of appetite. I also run cold; freezing even. It’s like someone turned the heating off in my body”.
Read More: Amy Schumer Opens Up On Side Effects After “Botched” Colonoscopy And Weight Loss Journey
Recognizing that many women experience similar struggles, Barnett made a new documentary film "Emma Barnett: Fighting Endometriosis" in which she speaks with women, including doctors, researchers and even politicians about their experiences with endometriosis, highlighting a neglected disease that has no known cure.
Through the documentary, Barnett hopes to raise awareness of the condition, improve public understanding, and draw attention to the long delays many women face in receiving a diagnosis.
“One of the reasons I have made a film about endometriosis is that I want people to understand it is not just ‘painful periods’. It’s a system-wide inflammatory condition where tissue similar to the lining of the uterus grows outside of it, causing agonizing pain. I am hoping to boost public understanding of that, and beyond merely being able to pronounce it,” she wrote in The Independent.
“It’s very hard to make something invisible visible, but what I am trying to do with this film is bring the invisible into light and show that this is a silent emergency.”
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IVF is often regarded as a medical milestone defined by protocols, cycles, and success rates. Over time, it has also come to be understood in a more holistic way, where clinical care and patient experience carry equal significance.
This is especially relevant today, as many patients begin IVF while managing demanding work environments, prolonged screen exposure, and irregular rest patterns. Given how closely reproductive health is linked to hormonal balance, lifestyle naturally becomes part of the broader care context. Which is why IVF care today is not only about clinical precision and outcomes, but equally about how supported, steady, and manageable the overall patient experience feels.
Here are ways to improve the IVF patient experience:
Evening screen exposure can interfere with melatonin production, affecting sleep quality. Reducing screen time before bed and allowing a wind-down period helps regulate sleep cycles and supports hormonal stability during treatment.
A standard IVF cycle involves a series of hormone injections administered over a defined timeline. Depending on the protocol, this can range from 20 to 40 injections in a single cycle. In India, where an estimated 300,000 to 350,000 IVF cycles are performed annually, this represents a significant physical and emotional load for patients. While these injections are necessary, it can be helpful to explore less invasive options such as needle-free injection systems. These systems use controlled pressure to deliver medication without a needle and may help reduce some of the discomfort associated with repeated injections. During IVF treatments, N-FIS, the needle-free injection device, has, in my observation, helped transform patient experience substantially.
Using the latest technological developments in drug delivery has eased the overall treatment experience completely; it has helped patients stay more comfortable and consistent throughout the IVF journey.
Sleep plays a direct role in hormonal regulation and recovery. During IVF, maintaining a regular sleep schedule becomes particularly important.
It is not only about getting enough hours of sleep, but also about maintaining rhythm and quality. A calm pre-sleep routine and a stable sleep environment can help the body respond better to treatment.
IVF does not require extreme lifestyle changes. It responds better to consistency than intensity. Light physical activity, such as walking or yoga, can help manage stress and support circulation. A balanced diet and adequate hydration further help the body maintain stability through hormonal changes.
The focus should remain on habits that are realistic to sustain, not idealized routines that are difficult to maintain under stress.
IVF is a medically intensive process, but for patients, it is also a deeply personal one that unfolds alongside everyday responsibilities.
Improving the experience does not always require large interventions. Often, it comes from small, practical adjustments that reduce strain, support routine, and help patients move through the journey with greater steadiness and less fatigue.
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