What is type 1.5 diabetes? It’s a bit like type 1 and a bit like type 2 – but it’s often misdiagnosed

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While you’re likely familiar with type 1 and type 2 diabetes, you’ve probably heard less about type 1.5 diabetes.

Also known as latent autoimmune diabetes in adults (LADA), type 1.5 diabetes has features of both type 1 and type 2 diabetes.

More people became aware of this condition after Lance Bass, best known for his role in the iconic American pop band NSYNC, recently revealed he has it.

So, what is type 1.5 diabetes? And how is it diagnosed and treated?

Pixel-Shot/Shutterstock

There are several types of diabetes

Diabetes mellitus is a group of conditions that arise when the levels of glucose (sugar) in our blood are higher than normal. There are actually more than ten types of diabetes, but the most common are type 1 and type 2.

Type 1 diabetes is an autoimmune condition where the body’s immune system attacks and destroys the cells in the pancreas that make the hormone insulin. This leads to very little or no insulin production.

Insulin is important for moving glucose from the blood into our cells to be used for energy, which is why people with type 1 diabetes need insulin medication daily. Type 1 diabetes usually appears in children or young adults.

Type 2 diabetes is not an autoimmune condition. Rather, it happens when the body’s cells become resistant to insulin over time, and the pancreas is no longer able to make enough insulin to overcome this resistance. Unlike type 1 diabetes, people with type 2 diabetes still produce some insulin.

Type 2 is more common in adults but is increasingly seen in children and young people. Management can include behavioural changes such as nutrition and physical activity, as well as oral medications and insulin therapy.

A senior man applying a device to his finger to measure blood sugar levels.
People with diabetes may need to regularly monitor their blood sugar levels. Dragana Gordic/Shutterstock

How does type 1.5 diabetes differ from types 1 and 2?

Like type 1 diabetes, type 1.5 occurs when the immune system attacks the pancreas cells that make insulin. But people with type 1.5 often don’t need insulin immediately because their condition develops more slowly. Most people with type 1.5 diabetes will need to use insulin within five years of diagnosis, while those with type 1 typically require it from diagnosis.

Type 1.5 diabetes is usually diagnosed in people over 30, likely due to the slow progressing nature of the condition. This is older than the typical age for type 1 diabetes but younger than the usual diagnosis age for type 2.

Type 1.5 diabetes shares genetic and autoimmune risk factors with type 1 diabetes such as specific gene variants. However, evidence has also shown it may be influenced by lifestyle factors such as obesity and physical inactivity which are more commonly associated with type 2 diabetes.

What are the symptoms, and how is it treated?

The symptoms of type 1.5 diabetes are highly variable between people. Some have no symptoms at all. But generally, people may experience the following symptoms:

  • increased thirst
  • frequent urination
  • fatigue
  • blurred vision
  • unintentional weight loss.

Typically, type 1.5 diabetes is initially treated with oral medications to keep blood glucose levels in normal range. Depending on their glucose control and the medication they are using, people with type 1.5 diabetes may need to monitor their blood glucose levels regularly throughout the day.

When average blood glucose levels increase beyond normal range even with oral medications, treatment may progress to insulin. However, there are no universally accepted management or treatment strategies for type 1.5 diabetes.

A young woman taking a tablet.
Type 1.5 diabetes might be managed with oral medications, at least initially. Dragana Gordic/Shutterstock

Type 1.5 diabetes is often misdiagnosed

Lance Bass said he was initially diagnosed with type 2 diabetes, but later learned he actually has type 1.5 diabetes. This is not entirely uncommon. Estimates suggest type 1.5 diabetes is misdiagnosed as type 2 diabetes 5–10% of the time.

There are a few possible reasons for this.

First, accurately diagnosing type 1.5 diabetes, and distinguishing it from other types of diabetes, requires special antibody tests (a type of blood test) to detect autoimmune markers. Not all health-care professionals necessarily order these tests routinely, either due to cost concerns or because they may not consider them.

Second, type 1.5 diabetes is commonly found in adults, so doctors might wrongly assume a person has developed type 2 diabetes, which is more common in this age group (whereas type 1 diabetes usually affects children and young adults).

Third, people with type 1.5 diabetes often initially make enough insulin in the body to manage their blood glucose levels without needing to start insulin medication. This can make their condition appear like type 2 diabetes, where people also produce some insulin.

Finally, because type 1.5 diabetes has symptoms that are similar to type 2 diabetes, it may initially be treated as type 2.

We’re still learning about type 1.5

Compared with type 1 and type 2 diabetes, there has been much less research on how common type 1.5 diabetes is, especially in non-European populations. In 2023, it was estimated type 1.5 diabetes represented 8.9% of all diabetes cases, which is similar to type 1. However, we need more research to get accurate numbers.

Overall, there has been a limited awareness of type 1.5 diabetes and unclear diagnostic criteria which have slowed down our understanding of this condition.

A misdiagnosis can be stressful and confusing. For people with type 1.5 diabetes, being misdiagnosed with type 2 diabetes might mean they don’t get the insulin they need in a timely manner. This can lead to worsening health and a greater likelihood of complications down the road.

Getting the right diagnosis helps people receive the most appropriate treatment, save money, and reduce diabetes distress. If you’re experiencing symptoms you think may indicate diabetes, or feel unsure about a diagnosis you’ve already received, monitor your symptoms and chat with your doctor.

Emily Burch, Accredited Practising Dietitian and Lecturer, Southern Cross University and Lauren Ball, Professor of Community Health and Wellbeing, The University of Queensland

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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    Let’s Get Fruity

    Bromelain is an enzyme* found in pineapple (and only in pineapple), that has many very healthful properties, some of them unique to bromelain.

    *actually a combination of enzymes, but most often referred to collectively in the singular. But when you do see it referred to as “they”, that’s what that means.

    What does it do?

    It does a lot of things, for starters:

    ❝Various in vivo and in vitro studies have shown that they are anti-edematous, anti-inflammatory, anti-cancerous, anti-thrombotic, fibrinolytic, and facilitate the death of apoptotic cells. The pharmacological properties of bromelain are, in part, related to its arachidonate cascade modulation, inhibition of platelet aggregation, such as interference with malignant cell growth; anti-inflammatory action; fibrinolytic activity; skin debridement properties, and reduction of the severe effects of SARS-Cov-2

    ~ Dr. Carolina Varilla et al.

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    • “facilitate the death of apoptotic cells” may sound alarming, but it’s actually good; those cells need to be killed quickly; see for example: Fisetin: The Anti-Aging Assassin
    • If you’re wondering what arachidonate cascade modulation means, that’s the modulation of the cascade reaction of arachidonic acid, which plays a part in providing energy for body functions, and has a role in cell structure formation, and is the precursor of assorted inflammatory mediators and cell-signalling chemicals.
    • Its skin debridement properties (getting rid of dead skin) are most clearly seen when using bromelain topically (one can literally just make a pineapple poultice), but do occur from ingestion also (because of what it can do from the inside).
    • As for being anti-thrombotic and fibrinolytic, let’s touch on that before we get to the main item, its anti-inflammatory properties.

    If you want to read more of the above before moving on, though, here’s the full text:

    Bromelain, a Group of Pineapple Proteolytic Complex Enzymes (Ananas comosus) and Their Possible Therapeutic and Clinical Effects. A Summary

    Anti-thrombotic and fibrinolytic

    While it does have anti-thrombotic effects, largely by its fibrinolytic action (i.e., it dissolves the fibrin mesh holding clots together), it can have a paradoxically beneficial effect on wound healing, too:

    Stem Bromelain Proteolytic Machinery: Study of the Effects of its Components on Fibrin (ogen) and Blood Coagulation

    For more specifically on its wound-healing benefits:

    In Vitro Effect of Bromelain on the Regenerative Properties of Mesenchymal Stem Cells

    Anti-inflammatory

    Bromelain is perhaps most well-known for its anti-inflammatory powers, which are so diverse that it can be a challenge to pin them all down, as it has many mechanisms of action, and there’s a large heterogeneity of studies because it’s often studied in the context of specific diseases. But, for example:

    ❝Bromelain reduced IL-1β, IL-6 and TNF-α secretion when immune cells were already stimulated in an overproduction condition by proinflammatory cytokines, generating a modulation in the inflammatory response through prostaglandins reduction and activation of cascade reactions that trigger neutrophils and macrophages, in addition to accelerating the healing process

    ~ Dr. Taline Alves Nobre et al.

    Read in full:

    Bromelain as a natural anti-inflammatory drug: a systematic review

    Or if you want a more specific example, here’s how it stacks up against arthritis:

    ❝The results demonstrated the chondroprotective effects of bromelain on cartilage degradation and the downregulation of inflammatory cytokine (tumor necrosis factor (TNF)-α, IL-1β, IL-6, IL-8) expression in TNF-α–induced synovial fibroblasts by suppressing NF-κB and MAPK signaling❞

    ~ Dr. Perephan Pothacharoen et al.

    Read in full:

    Bromelain Extract Exerts Antiarthritic Effects via Chondroprotection and the Suppression of TNF-α–Induced NF-κB and MAPK Signaling

    More?

    Yes more! You’ll remember from the first paper we quoted today, that it has a long laundry list of benefits. However, there’s only so much we can cover in one edition, so that’s it for today

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    It is generally recognized as safe. However, its blood-thinning effect means it should be avoided if you’re already on blood-thinners, have some sort of bleeding disorder, or are about to have a surgery.

    Additionally, if you have a pineapple allergy, this one may not be for you.

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    Want to try some?

    You can just eat pineapples, but if you don’t enjoy that and/or wouldn’t want it every day, bromelain is available in supplement form too.

    We don’t sell it, but here for your convenience is an example product on Amazon

    Enjoy!

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  • Cauliflower vs Carrot – Which is Healthier?

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    Xylazine is a non-opioid tranquilizer designed for veterinary use in animals. The sedative is not approved for use in people, yet it’s becoming more prevalent in the illicit drug supply.

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