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DIABETES SERIES · ARTICLE 2 OF 17
Type 1 vs Type 2
The real differences — and why they matter.
In our first article we said there are two main kinds of diabetes — Type 1 and Type 2 — and they sound similar but are actually quite different. This article goes deeper. Because the way each one starts, what causes it, how it's treated, and what it means for daily life are not the same.
Getting this right matters. People with Type 1 are often given advice meant for Type 2 — “just lose weight, exercise more” — which simply doesn't apply. People with Type 2 are sometimes told their condition is mild when it isn't. And many people with a third, less-known form (Type 1.5) are misdiagnosed for years.
Whether you're newly diagnosed, supporting someone who is, or just want to understand what's going on in your own family — this guide is for you.
Before you read on
This is information, not medical advice. The kind of diabetes you have can only be confirmed by a doctor with the right tests. Use this article to understand the differences, then take your questions to a clinic.
The quick version
Before we go deeper, here's the side-by-side.
**Type 1** **Type 2**
What goes wrong The pancreas stops making insulin altogether. The body stops responding to insulin properly. Over time it also makes less. Cause The immune system attacks the pancreas. Not caused by lifestyle. A mix of genes, weight, diet, exercise, age, and stress. When it usually starts Often in childhood or as a young adult — but possible at any age. Usually after 40, but increasingly seen in younger adults and even children. How fast it appears Sudden. Days to weeks. Often dramatic. Slow. Months to years. Often discovered by accident. Treatment from day 1 Insulin injections, every day, for life. Often food and movement first, tablets next, sometimes insulin later. Can it be prevented? No — current science can't prevent it. Often yes — lifestyle changes can prevent or delay it. Can it go into remission? Not currently. Yes, especially in the first few years after diagnosis. How common 5–10% of people with diabetes. About 90% of people with diabetes.
Type 1 diabetes, in depth
Type 1 is what doctors call an autoimmune condition — the body's own defence system gets confused and attacks healthy tissue. In Type 1, the targets are the special cells in the pancreas (called beta cells) that make insulin. Once enough of them are destroyed, the pancreas can't keep up, and insulin production drops to almost zero.
This is not something the person did. Not a food they ate. Not too much sugar. Not a “weak” pancreas. It is essentially bad luck, set off by some combination of genetic risk and something in the environment (researchers are still figuring out exactly what).
How it starts
Type 1 usually appears suddenly. Over a few days or weeks, the person — often a child or teenager — starts feeling very ill. The four big signs are:
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Extreme thirst — drinking constantly
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Frequent urination — including waking up at night, or bed-wetting in a previously dry child
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Rapid weight loss — even with good appetite
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Exhaustion — far beyond normal tiredness
Without treatment, Type 1 can progress to a life-threatening emergency called diabetic ketoacidosis (DKA) within days. Signs include fruity-smelling breath, vomiting, deep rapid breathing, abdominal pain, and confusion. This needs hospital treatment immediately.
This is an emergency
If a child or young adult has the symptoms above — especially the rapid weight loss and constant thirst — go to a hospital today. Don't wait for a clinic appointment.
Who gets Type 1
Most people diagnosed with Type 1 are under 30, with the most common ages being childhood and the teens. But Type 1 can develop at any age. Some people are diagnosed in their 40s, 50s or later — often misdiagnosed as Type 2 at first.
Having a parent or sibling with Type 1 raises the risk slightly, but most people with Type 1 have no family history of it. It is not caused by sugar, by diet, by stress, or by weight.
Daily life with Type 1
Because the body makes no insulin, it has to come from outside. That means injections (usually 4 or more per day) or an insulin pump. The person also tests their blood sugar multiple times a day — either with a finger-prick meter or a continuous glucose monitor (CGM) sensor on the arm.
Managing Type 1 is a constant balance: insulin lowers blood sugar, food (especially carbohydrates) raises it, exercise lowers it, illness raises it, stress raises it, alcohol affects it. People with Type 1 become extremely skilled at this maths over time. It is not just willpower or a strict diet — it is a precise daily medical task.
The good news: with modern insulin, monitoring tools, and care, people with Type 1 can live full, long, active lives. South Africans with Type 1 are running businesses, playing sport at the highest level, raising children, and growing old.
Type 2 diabetes, in depth
Type 2 is a different story. Here, the pancreas does still produce insulin — at least at first. The problem is that the body's cells stop responding to it properly. This is called insulin resistance.
Imagine the insulin “key” still fits the lock on the cell door, but the lock has become stiff. Insulin can't open it easily. So the pancreas makes more insulin to force the lock. For a while, this works — but it puts the pancreas under chronic strain. Eventually, after years of overwork, it produces less and less insulin. Now you have both insulin resistance AND not enough insulin. Blood sugar rises.
Type 2 develops slowly. Many people have it for 5 to 10 years before they even know — often discovered when a routine clinic visit shows a high blood sugar reading, or when a complication (like blurred vision or a non-healing wound) finally drives them to seek help.
Who gets Type 2
Type 2 has many risk factors — and they often work together:
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Family history (genetics matter a lot)
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Carrying extra weight, especially around the belly
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Age over 40 (though younger people are getting it more often)
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A history of gestational diabetes during pregnancy
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Polycystic ovary syndrome (PCOS) in women
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High blood pressure or high cholesterol
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A sedentary lifestyle (very little movement)
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A diet heavy in refined starches and sugar
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Ethnicity — in South Africa, rates are highest in the Indian population, with rising rates among Black, Coloured, and White South Africans
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Smoking
Notice that this list mixes things you can change (weight, diet, exercise, smoking) with things you can't (genes, family history, age, ethnicity). Type 2 is never “your fault” — but the modifiable factors are where the power lies.
Daily life with Type 2
Treatment for Type 2 is usually tiered, starting with the least invasive options first:
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Step 1 — Food and movement. For many newly diagnosed people with mild Type 2, this alone can bring blood sugar down to normal. Eating smaller portions of refined starch and sugar, walking after meals, losing some weight, and sleeping properly are powerful tools.
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Step 2 — Tablets. The most common is metformin, which makes the body more sensitive to insulin. There are several other classes too — DPP-4 inhibitors, SGLT2 inhibitors, GLP-1 agonists. The clinic chooses based on the person.
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Step 3 — Insulin. Some people with Type 2 eventually need insulin injections too — usually because the pancreas has become exhausted after many years. This isn't a failure; it's just the next step in treatment.
People with Type 2 also test their blood sugar (though usually less often than Type 1), see their clinic every 3 to 6 months for HbA1c testing, and get annual checks of their eyes, kidneys and feet.
Remission is possible
If diagnosed early — within the first 6 years or so — and if the person can lose a meaningful amount of weight (often 10–15 kg or more), Type 2 can go into remission. Blood sugar returns to normal. Medication may not be needed.
This is not a cure. The underlying risk remains, and the condition can come back. But years — even decades — of life without diabetes symptoms are absolutely possible.
Type 1.5 — the in-between
There's a third form that's much less talked about: LADA, which stands for Latent Autoimmune Diabetes in Adults. It's sometimes called “Type 1.5” because it sits between Type 1 and Type 2.
LADA is autoimmune like Type 1 — the immune system slowly attacks the pancreas — but it develops more slowly, usually in adults over 30. Because it appears in adulthood and starts mildly, it's often mistaken for Type 2 at first. The person may be put on tablets that seem to work… until they don't.
If a person diagnosed with Type 2 finds that tablets stop working unusually quickly, or they're not overweight and have no obvious Type 2 risk factors, LADA should be considered. A simple antibody blood test can confirm it. Treatment shifts to insulin earlier.
Estimates suggest 5–10% of people initially diagnosed with Type 2 actually have LADA. Worth knowing — if your situation doesn't fit the typical Type 2 picture, ask your clinic about it.
Common myths and confusions
“Only overweight people get diabetes.”
False. Type 1 has nothing to do with weight. Plenty of thin people develop Type 2 too — especially in families where there's a strong genetic predisposition. Weight is one risk factor for Type 2, not the only one.
“I'm too young for diabetes.”
False. Type 1 most often appears in childhood and young adulthood. Type 2 used to be a “middle-aged” condition, but more and more teenagers and young adults are being diagnosed — especially in South Africa where lifestyles have changed rapidly.
“Type 2 is the mild kind.”
Both kinds are serious. Type 2 may be more controllable in its early years, but if neglected it causes the same complications as Type 1: heart attack, stroke, kidney failure, blindness, amputations. The “mild” label has done real damage by letting people delay treatment.
“Sugar causes diabetes.”
Sort of, but not quite. Eating lots of sugar over years can contribute to weight gain and insulin resistance, both of which raise Type 2 risk. But a single sugary meal doesn't cause diabetes, and Type 1 has nothing to do with sugar consumption at all.
“You can catch diabetes from someone.”
No. Diabetes is not infectious. You cannot catch it from sharing food, kissing, or any other contact.
“If my parent has Type 2, I'm guaranteed to get it.”
Not guaranteed — but your risk is higher. That's why family history is one of the main things doctors ask about. With awareness and prevention (movement, weight management, regular screening), many people with strong family histories never develop Type 2.
How doctors tell which is which
If the diagnosis isn't obvious from age and symptoms, the clinic can run two tests:
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Antibody tests. These look for specific markers (GAD, IA-2, ZnT8 antibodies) that show the immune system is attacking the pancreas. Positive results suggest Type 1 or LADA.
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C-peptide test. This measures how much insulin the pancreas is still making. Very low = Type 1. Normal or high = Type 2 (insulin resistance with the body still producing insulin).
These tests aren't always done routinely — many South African clinics diagnose based on age, symptoms and treatment response. But if your situation is unclear, ask. The right diagnosis leads to the right treatment from the start.
The treatment differences that matter
Aspect Type 1 Type 2 Insulin Required from day one, every day. Often not needed initially. May be needed later if the pancreas tires. Tablets Generally not used (the body needs insulin, not pills). First-line treatment. Metformin is most common. Lifestyle role Important for general health, but won't replace insulin. Can dramatically lower blood sugar. Sometimes enough on its own at first. Monitoring Multiple times a day (or continuous via CGM). Less often — typically before meals or as advised. Hypoglycaemia risk High — must always carry glucose, juice or sweets. Lower, but real if on insulin or some tablets. Remission possible? Not currently. Yes — especially in the first few years.
What families need to know
Diabetes is a family matter, regardless of type. The person who's been diagnosed will need support — emotional, practical, sometimes financial. Here's what helps most:
For families of someone with Type 1
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Learn the signs of low blood sugar (hypoglycaemia) — shaking, sweating, confusion, slurred speech. Know where the glucose tablets or juice are kept.
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Don't comment on what they're eating. They've calculated the insulin for it.
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Respect that they're managing a complex medical condition. They're not being “dramatic”.
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Let them lead. They know their body better than anyone else.
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Be the calm one. Type 1 management is intense; a steady person around them helps.
For families of someone with Type 2
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Don't shame or blame. Type 2 is a medical condition, not a moral failing.
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Change the household, not just the person. Cooking healthier meals for everyone is far easier than asking one person to eat differently.
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Walk with them. Exercise is more likely to stick if it's a shared habit.
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Don't be the “diabetes police”. Constant monitoring of what they eat or do builds resentment, not health.
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Get tested yourself. If you share genes, you share risk.
You're not alone
Whichever kind of diabetes you or someone you love has, you're walking a road that millions of South Africans are walking too. The condition is real and demanding — but it is also manageable. With the right diagnosis, the right support and the right daily habits, full lives are not just possible. They are normal.
The next article in this series tackles the question people ask most: the 10 most affordable South African foods for diabetics. Practical, supermarket-priced, no fancy ingredients.
Where to get more help
Diabetes South Africa — diabetessa.org.za · 011 792 9888 (information, support groups, finding a registered dietitian)
Your nearest public clinic — free testing, treatment, and chronic care
Type 1 Diabetes SA (Facebook community) — peer support specifically for people with Type 1
Phila Today Diabetes Series — next: the 10 most affordable diabetic-friendly foods
Phila Today · Article 2 of 17 in the Diabetes Series