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: Canva
Hemophilia is a rare genetic bleeding disorder, usually inherited, wherein blood cannot clot properly due to low levels of clotting factors, causing prolonged bleeding or spontaneous internal hemorrhages.
Symptoms include easy bruising, joint pain/swelling, and excessive bleeding. While not curable, it is treated with factor replacement therapy and gene therapy.
India has the world's second-largest population of hemophilia patients, with estimates suggesting over 70,000 to over 1,36,000 cases of Hemophilia A and B. However, while around 13,000 to 19,000+ patients are registered, many remain undiagnosed.
This World Hemophilia Day, Dr Dr Bilal Ahmed, Prof and Head, Government Medical College, J&K exclusively told Healthandme that the primary reason why thousands of Indians remain undiagnosed and unable to access proper care is due to budget constraints, lack of awareness among policymakers, and the need for technocrats to advocate boldly for regular replacement therapy.
Despite having the second-largest hemophilia population, only 9-10 percent receive treatment as compared to 80-100 percent in some European countries.
The expert explained: "Money plays an important role. Every center in India has, at their own level, their own policymakers and the people who are at the helm of affairs. We are the second home for the hemophilia and we can change the lives of these people by having the regular replacement but it is all depending upon the perception of individual centers."
He also noted that the government needed to introduce policy reforms endorsing regular replacement therapy as the gold standard to help ensure equitable access to patients.
The median age at diagnosis for severe hemophilia in India stands at 60 months—five full years—compared to under 12 months in high-income countries. This delay is not just a matter of time but one that poses a risk of serious clinical consequences. Late diagnosis often means repeated, unmanaged bleeding episodes during early childhood, particularly into joints, before appropriate treatment begins.
The three types of this condition include :
The treatments for haemophilia have never been more effective, but they work only for patients who have been diagnosed. In a condition where every missed bleed moves a joint closer to permanent damage, the most important clinical act is also the most basic one: recognition.
The main treatment for severe hemophilia involves replacing the clotting factor you need through a tube in a vein. This replacement therapy can be given to treat a bleeding episode in progress. It can also be given on a regular schedule at home to help prevent bleeding episodes. Some people receive continuous replacement therapy.
Replacement clotting factor can be made from donated blood. Similar products, called recombinant clotting factors, are made in a laboratory, not from human blood.
Visceral fat is one of the contributors of lean fatty liver. (Photo credit: iStock)
For many people, a normal weight brings a sense of reassurance. If the weighing scale looks fine, health is assumed to be in check. However, in clinical practice, we are increasingly seeing individuals who are not overweight yet show clear signs of fatty liver. This condition, often called lean fatty liver, is quietly becoming more common in India and is a major public health concern.
Dr Harshavardhan Rao B, HOD & Consultant, Department of Gastroenterology, Ramaiah Memorial Hospital, while talking about the possibility of people suffering from a lean fatty liver, despite normal body weight, answered all FAQs regarding the condition.
When fat accumulates in the liver of individuals who have a normal body mass index (BMI), it is referred to as "lean fatty liver." It falls under the broader category of metabolic dysfunction-associated steatotic liver disease (MASLD), but it occurs in people who do not fit the prototypical profile of being overweight with high sugar levels and uncontrolled blood pressure. It is also more common in younger age groups compared to the typical MASLD patient. This contradicts the general belief that a normal body weight and BMI are indicators of good metabolic health and, by extension, optimal liver function.
Metabolic diseases are presenting differently in the Indian population. Even individuals who appear lean may carry underlying metabolic risk. Several patterns are worth noting:
Lean fatty liver produces no obvious symptoms in the early stages. Most individuals feel entirely well. The diagnosis is typically incidental—picked up during routine health check-ups when liver enzymes are mildly elevated or when an ultrasound shows fatty changes.
The absence of warning signs has two potentially serious downstream effects. Firstly, most cases are diagnosed at a later stage when liver damage has already set in, and secondly, it makes it easy to defer action since the patient perceives no discomfort and does not feel the need to prioritise this over routine work and personal stresses.
Body weight does not give the full picture of metabolic health. A normal BMI can coexist with:
This forms the basis for the clinical category of “metabolically unhealthy, normal weight."
Beyond the standard risk factors, several contributors tend to be underappreciated:
Together, these factors can have profound effects on metabolic health and eventually lead to fatty liver and even long-term liver damage.
What Should Be Done?
The management of lean fatty liver focuses on metabolic improvement rather than weight reduction.
IVF can be helpful for patients battling infertility. (Photo credit: iStock)
Failure to conceive using IVF can be devastating, but one should realise that one failed attempt does not determine a couple’s fertility journey. The success of IVF is determined by various factors such as age, egg and sperm quality, and the uterine environment, as well as underlying medical conditions. An unsuccessful attempt can also be a valuable source of clinical information that can be used to guide future treatment procedures. It should be seen not as an ending but as a starting point for more individualised and effective care in future cycles.
It is necessary to conduct a careful assessment after an unsuccessful IVF cycle. This involves a review of the stimulation protocol, the response of the ovaries, the quality of the retrieved eggs, fertilisation rates, and embryo growth. In some instances, issues with embryo quality, implantation, or hormonal imbalances may be identified. Further tests such as genetic testing of embryos, evaluation of the receptivity of the uterine lining, or screening for conditions such as endometriosis or thyroid disorders may be recommended. These insights can be used to make the subsequent cycle more precise.
Mental health
Emotional health is highly significant in the healing process. A failed IVF cycle may have a considerable psychological impact, leading to stress, anxiety, and self-doubt. Such feelings should not be disregarded, and appropriate support should be sought, whether through counselling, support groups, or simply by talking to a partner. Addressing emotional health not only aids coping but also has a beneficial effect on overall treatment outcomes.
Lifestyle changes can also play a role in improving outcomes in future attempts. Maintaining a healthy weight, following a balanced diet, managing stress, and avoiding smoking or excessive alcohol consumption are important factors. Hormonal balance and reproductive health may also be supported through adequate sleep and moderate exercise. Small yet consistent lifestyle adjustments may help prepare the body for another cycle.
Treatment plans can be modified based on previous results. This might include changes in medication regimens or the use of advanced procedures such as intracytoplasmic sperm injection (ICSI), assisted hatching, or preimplantation genetic testing (PGT). In some instances, the use of donor eggs or sperm, or options such as frozen embryo transfer, may be considered. All approaches are personalised, taking into account the medical history of the couple and their previous response to treatment.
The timing of the next attempt is another important aspect. While some individuals may be physically ready to proceed soon after a failed cycle, others may benefit from taking time to rest and recover both physically and emotionally. Such a break also allows for further evaluation and optimisation of health parameters before resuming treatment.
In the end, persistence combined with a personalised, evidence-based approach tends to increase the likelihood of success. Advancements in reproductive medicine continue to offer new hope, even after setbacks in IVF. With careful assessment, emotional support, and appropriate adjustments in treatment, many couples achieve successful pregnancies in subsequent cycles.
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