Smoking and Diabetes: The Hidden Connection Most Australians Don’t Know About
By Michael Whelehan | Certified Master Hypnotherapist and Master NLP Practitioner | Breathe Hypnotherapy Melbourne | Updated May 2026
Most smokers are well aware of the risks to their lungs and heart. But the connection between smoking and diabetes in Australia is one that rarely comes up in conversation, and that silence is costing people their health. Research confirms that smoking significantly raises your risk of developing type 2 diabetes, and if you already have the condition, continuing to smoke makes it dramatically harder to manage. This blog breaks down exactly what the science says, why the risk is greater than most people realise, and what happens to your body when you finally stop.
How Big Is Australia’s Diabetes Problem Right Now?
The scale of diabetes in Australia is significant and growing. According to the Australian Institute of Health and Welfare, around 1.3 million Australians (5.1% of the population) were living with diagnosed diabetes as of 2021, up sharply from 400,000 diagnosed cases in 2001. Estimates suggest an additional 275 Australians are diagnosed with diabetes every single day.
What makes this even more alarming is that up to half of all type 2 diabetes cases are believed to remain undiagnosed. Millions of Australians may be unknowingly living with elevated blood sugar and the complications that come with it.
Type 2 diabetes is the most common form and accounts for the vast majority of cases. Unlike type 1 diabetes, which is primarily an autoimmune condition, type 2 diabetes is directly influenced by lifestyle factors including diet, physical activity and whether you smoke.
Does Smoking Actually Cause Type 2 Diabetes?
Yes. Smoking is a recognised cause of type 2 diabetes. The Australian Government Department of Health is direct on this point: type 2 diabetes is caused by both lifestyle and inherited factors, and smoking is listed as one of those direct causes.
The relationship is dose-dependent. The more cigarettes you smoke and the longer you have smoked, the higher your risk becomes. This is not a marginal or speculative association. It is a well-documented, clinically significant risk factor backed by decades of research.
For a deeper look at how smoking damages your cardiovascular system alongside this, read our post on Smoking and Heart Disease: 5 Critical Facts Smokers Must Know.
The Role of Insulin Resistance
The primary mechanism behind smoking’s effect on diabetes risk centres on insulin resistance. Research cited by the AIHW confirms that smoking increases insulin resistance, the condition where the body’s cells no longer respond properly to insulin. Insulin is the hormone responsible for moving glucose out of the bloodstream and into cells for energy.
When insulin resistance develops, the pancreas works harder to produce more insulin to compensate. Over time, it can no longer keep up. Blood sugar levels rise, and type 2 diabetes follows.
Nicotine, the primary addictive component in both cigarettes and vapes, appears to play a central role in this process. It directly interferes with insulin signalling pathways. Combined with the inflammatory effects of the thousands of other chemicals in tobacco smoke, the result is a system-wide disruption to the body’s ability to regulate blood sugar.
Does Passive Smoking Also Raise the Risk?
The risk is not limited to active smokers. According to Diabetes Australia, either being a smoker or being regularly exposed to secondhand smoke can significantly increase your risk of developing type 2 diabetes. This is a crucial point for anyone who lives with a smoker or regularly spends time in smoking environments.
If You Already Have Diabetes and You Smoke, the Risks Compound
For Australians already living with type 2 diabetes, continuing to smoke creates a second layer of risk that goes well beyond blood sugar management. According to the Australian Government’s health data on smoking and diabetes, smokers with diabetes face significantly elevated risks across several areas.
Blood vessel damage. Smoking accelerates deterioration of blood vessels throughout the body. For people with diabetes, this can lead to kidney disease, blindness, foot complications requiring amputation and stroke. Diabetes already places considerable strain on the circulatory system. Smoking amplifies that strain considerably.
Nerve damage (neuropathy). The AIHW confirms that people with diabetes who smoke further increase their risk of peripheral neuropathy, the painful nerve damage that commonly affects the feet and hands and can become permanent if left unaddressed.
Increased cancer risk. If you have diabetes and smoke, your risk of pancreatic cancer is substantially elevated. For those who also have a family history of pancreatic cancer, the risk is particularly high.
Bone fractures. Post-menopausal women with diabetes who smoke are three times more likely to break a hip than non-smokers with diabetes, based on Australian Government health data.
This is why healthcare providers consistently identify quitting smoking as one of the single most impactful decisions a person with diabetes can make for their long-term health.
What About Vaping? Is It Any Different?
Vaping is increasingly common among Australians attempting to reduce cigarette use, but the evidence on its relationship with blood sugar is not reassuring. The AIHW notes emerging research suggesting e-cigarettes can influence glucose levels and contribute to the development of pre-diabetes.
Nicotine is present in most vaping products, and nicotine is central to the insulin resistance problem. Switching from cigarettes to vaping does not remove the metabolic risk. It changes the delivery method while leaving the underlying driver intact.
If you are currently vaping as a strategy to manage nicotine dependence, it is worth understanding that you may still be exposed to the same diabetes risk pathway. Our quit smoking and vaping program is designed to help people become completely nicotine-free, not to substitute one habit for another.
The Good News: What Quitting Smoking Actually Does for Your Body
One of the most important and underreported facts in this space is that quitting smoking produces real, measurable improvements in metabolic health. The longer you remain nicotine-free, the more your insulin sensitivity improves and the more your risk trajectory normalises.
For people already living with type 2 diabetes, quitting smoking makes blood sugar considerably easier to manage. Many find their medication needs change after quitting, which is worth discussing with your GP. The overall risk of complications including heart disease, kidney disease and nerve damage also begins to decline from the point of cessation.
To understand the full timeline of physical recovery after quitting, read our post: Body After Quitting Smoking: A Timeline of Recovery.
Every day as a non-smoker is a day your body is working to repair the metabolic damage that cigarettes cause. The process is not instant, but it is consistent and it starts from day one.
Why Most Quit Attempts Fail
The majority of smokers who try to quit using willpower alone, cold turkey, or nicotine replacement products relapse within weeks. This is not a failure of character or motivation. It is a reflection of how deeply the smoking habit is embedded at a subconscious level.
Smoking is not purely a physical addiction. It is a conditioned response: a set of automatic behaviours and emotional associations that operate beneath conscious awareness. The stress of a difficult day, a morning coffee, sitting in traffic — these triggers fire the urge to smoke automatically before the conscious mind has a chance to intervene. For more on this, read our post on why smoking is more autopilot than addiction.
Approaches that work only at the conscious level, such as willpower, patches or gum, address the physical craving without touching the subconscious patterns that drive the behaviour. This is why they have a limited long-term success rate for the majority of people.
If stress is one of your main smoking triggers, our post on Smoking and Anxiety: Why Every Cigarette Makes It Worse is also worth reading.
How Hypnotherapy Can Help You Quit for Good
Hypnotherapy works at the subconscious level, addressing the patterns, associations and conditioned responses that keep people smoking long after the rational mind has decided to stop. Rather than fighting the urge to smoke, hypnotherapy works to disrupt the automatic responses that generate that urge in the first place.
At Breathe Hypnotherapy, Michael Whelehan uses a single-session program combining advanced hypnotherapy, NLP (Neuro Linguistic Programming) and cognitive reprogramming. Sessions are conducted online via Zoom, making the program accessible to Australians nationwide, and every session is backed by a lifetime support guarantee.
The goal is complete nicotine freedom, not habit management or dose reduction. Which means the insulin resistance that nicotine drives has the genuine opportunity to begin reversing.
If your health is the reason you want to quit, whether it is a diabetes diagnosis, a family history, or simply a growing awareness of what smoking is doing to your body, there is no better time to act than now. You can see what the cost of continuing adds up to here .
Frequently Asked Questions
Does smoking directly cause type 2 diabetes?
Yes. The Australian Government Department of Health lists smoking as a direct cause of type 2 diabetes. The risk increases with the number of cigarettes smoked daily and the number of years a person has smoked. The primary mechanism is increased insulin resistance.
How does smoking raise diabetes risk?
Smoking increases insulin resistance, meaning the body’s cells stop responding effectively to insulin. The pancreas compensates by producing more insulin, but over time it cannot keep up, blood sugar levels rise, and type 2 diabetes can develop. Nicotine is a central driver of this process.
Does quitting smoking reduce diabetes risk?
Yes. Quitting smoking allows insulin sensitivity to improve over time. For people already living with diabetes, quitting also significantly reduces the risk of associated complications including cardiovascular disease, kidney disease and nerve damage.
Is vaping safer than smoking for diabetes risk?
The evidence does not support vaping as a safe alternative in terms of diabetes risk. Emerging research suggests e-cigarettes can influence blood glucose levels and contribute to pre-diabetes. Nicotine, present in most vaping products, remains a driver of insulin resistance regardless of the delivery method.
Important Note
Individual results may vary. Hypnotherapy may be most effective when you are genuinely ready to quit smoking. Success depends on your mindset, readiness, and commitment to change. Hypnotherapy is not a substitute for medical advice. If you have concerns about your blood sugar, diabetes risk or general health, please consult your GP or a qualified healthcare professional. Always consult with your healthcare provider before changing or stopping any prescribed treatment, including smoking cessation medication. The 95% success rate cited on this website is based on Breathe Hypnotherapy’s documented client outcomes.
