Alcohol is a toxin that affects many organs and systems in the body. Its effects on blood glucose, weight, liver, heart, and cancer risk are especially important for people with type 2 diabetes.

Alcohol and diabetes

Alcohol interferes with the liver’s role in maintaining safe blood glucose levels. While breaking down alcohol, the liver cannot release stored glucose effectively. This raises the risk of low blood glucose (hypoglycaemia), particularly for people using insulin or sulfonylurea tablets.

Hypoglycaemia from alcohol can occur several hours after drinking, including overnight. Symptoms—such as confusion, slurred speech, drowsiness, or unsteadiness—can be mistaken for drunkenness, which may delay treatment.

Hidden calories and weight gain

Alcohol is high in kilojoules but provides little to no nutritional benefit, contributing to weight gain. Many alcoholic drinks, including beer, cider, premixed drinks, and liqueurs, also contain carbohydrates and added sugar, which can raise blood glucose.

Weight gain worsens insulin resistance and may increase the need for diabetes medication or insulin. Regular drinking can make losing weight or maintaining a healthy weight much harder—an important part of managing type 2 diabetes.

Impact on diabetes self‑care

Alcohol can reduce judgment, memory, and motivation, disrupting day-to-day diabetes management. This may lead to missed blood glucose checks, skipped insulin or tablets, or deviations from usual meal plans. Heavier drinking is linked with poorer HbA1c results and less consistent self-care over time.

Other health risks

People with type 2 diabetes already have higher risks of heart disease, stroke, fatty liver disease, and nerve damage. Alcohol adds further strain to these systems:

• Raises blood pressure and triglycerides, increasing heart attack and stroke risk
• Can worsen liver disease and peripheral neuropathy
• Linked to at least seven types of cancer, including mouth, throat, oesophagus, liver, colon, rectum, and breast

Alcohol is classified as a group 1 carcinogen by the International Agency for Research on Cancer (IARC), alongside tobacco and asbestos. The World Health Organization (WHO) states that no level of alcohol is truly safe—the risk begins even at low levels.

Alcohol is especially dangerous in these situations:

• History of severe hypoglycaemia
• Living alone or difficulty recognising low blood glucose
• Existing liver disease, pancreatitis, advanced nerve damage, heart problems, or pregnancy

Reducing alcohol intake

Many non-alcoholic beers, wines, spirits, and ready-made cocktails now replicate the taste and experience of drinking without alcohol. Switching to these options is an effective way to reduce intake while maintaining social participation.

Not drinking is becoming increasingly socially accepted, but it can still attract questions or comments, especially in certain settings. How much you choose to share is entirely up to you, but a simple, polite response can help redirect the conversation. A few examples you could use are:

• “Oh, I’m doing a health challenge at work/the gym right now, and part of the challenge is to cut out alcohol.”
• “I’m driving tonight, so I’m keeping it alcohol-free.”
• “I’m training for something at the moment, so staying off alcohol.”
• “I’ve got a busy day tomorrow, and have to be up early.”
• “I just don’t feel like it tonight.”
• “I’m trying out some health changes, and this is part of it.”
• “I’m currently taking antibiotics/medication that I’ve been advised not to mix with alcohol.”
• “I’m experimenting with zero-alcohol options—have you tried any?”
• “Just felt like doing a ‘dry month’ to reset.”

These kinds of answers are non-confrontational, don’t invite debate, and keep the focus on you rather than the topic of drinking more broadly.

Note: Heavy or regular drinkers should not stop drinking abruptly. Always consult your doctor or healthcare professional before reducing or stopping alcohol.

Recap

Alcohol is a toxin that disrupts multiple bodily systems, affects blood glucose, increases cardiovascular risk, and raises the risk of cancer. Reducing or eliminating alcohol—by switching to zero-alcohol alternatives, for example—is one of the most powerful changes for diabetes and overall health. Growing social acceptance and product availability make it easier than ever to cut back.

Resources

• National Alcohol & Other Drug Hotline — 1800 250 015
• FARE
• Alcohol and Drug Foundation
• Daybreak — Free and confidential app to help you change your relationship with alcohol
• Hello Sunday Morning — Website and app with resources to review or change your relationship, and get support in reducing or quitting drinking
• Clean Slate Clinic