Difference Between Type 1 and Type 2 Diabetes

Diabetes affects over 29 million people in the United States, and 1 in 4 are unaware that they have diabetes. Type 1 diabetes is usually diagnosed in younger people and occurs when the body cannot produce enough insulin. In type 2 diabetes, the body cannot use the insulin it produces. This disease, frequently related to obesity, a sedentary lifestyle, and genetics, is most often diagnosed in adults, but incidence rates are increasing among teens in America.

What is Diabetes?

Diabetes is a disease in which the body cannot properly store and use fuel for energy. The fuel the body needs is called glucose. Glucose comes from foods such as bread, cereals, pasta, rice, potatoes, fruits, and some vegetables. To use glucose, the body needs insulin. Insulin is made by a glandular organ called the pancreas.

When the body doesn't produce or process enough insulin, it causes an excess of blood glucose (sugar). When the body's level of glucose is too high, that becomes the chronic condition known as diabetes.

What is Type 1 Diabetes?

Type 1 diabetes arises when the body suddenly makes little or no insulin. It usually develops in children and teens; however, type 1 can develop at any time in a person's life.

Type 1 (a.k.a., juvenile-onset or insulin-dependent) diabetes develops due to a virus or autoimmune disorder in which the body does not recognize an organ as its own and attacks that organ. To be exact, the body's immune system destroys certain cells in the pancreas. These cells are called beta cells, and they make insulin, a hormone that prompts cells to absorb glucose. Because of this disorder, the body stops making insulin.

Symptoms − Symptoms of Type 1 diabetes include increased thirst and urination, constant hunger, weight loss, blurred vision, and extreme tiredness.

Treatment − Type 1 diabetics are required to take regular insulin injections to move sugar from the bloodstream.

What is Type 2 Diabetes?

Type 2 diabetes arises when the body gradually becomes resistant to the insulin it makes. It is the most common form of diabetes, mainly affecting overweight adults over the age of 40 who have a family history of type 2 diabetes.

The most common diabetes, type 2, is known as adult-onset or non-insulin-dependent diabetes. It is typically closely related to genetics, obesity, and physical inactivity. In type 2 diabetes, insulin production is too low, or the cells have become resistant to the hormone, essentially ignoring it. This means that insulin levels can be low, high, or normal and may even fluctuate if a diabetic is not careful with treatment.

Symptoms − Type 2 symptoms appear gradually and are more subtle than those seen with type 1. This makes catching the onset of type 2 diabetes harder to recognize for early treatment. Symptoms include unexpected weight loss, blurred vision, feeling tired or sick more frequently, and more frequent urination (especially at night). Higher levels of thirst, frequent infections, and slower healing of cuts and scrapes.

Treatment − Type 2 diabetics can use diet, weight management, exercise, and in many cases, medication as the treatment. Occasionally, especially later in life, a person with type 2 may be placed on insulin to control blood sugar better.

Who Uses Insulin?

Because people with type 1 diabetes can’t produce enough or any insulin, they are required to take insulin every day. This is why type 1 diabetes is known as insulin-dependent diabetes.

People with type 2 diabetes may or may not have to take insulin, as the pancreas may still be capable of some insulin production that can be regulated through lifestyle changes (i.e., diet and exercise). As such, type 2 diabetes is known as non-insulin-dependent diabetes.

While some type 2 diabetics manage to avoid needing insulin for decades or even their whole lifetime, type 2 diabetes is a progressive disease, meaning it worsens over time in most individuals. Because of this, type 2 diabetics may require insulin and other medications later in life if they do not carefully manage their diets and exercise.

What Does Insulin Do?

The pancreas produces and secretes insulin, a hormone that helps the body turn food into energy. Insulin also helps store nutrients as excess energy that the body can make use of at a later time. When a person eats, insulin releases blood glucose to the body's cells, where it becomes an energy source for making proteins, sugars, and fat.

Between meals, insulin regulates the body's use of these stored proteins, sugars, and fats. The brain receives insulin signals to reduce or shut down appetite. Insulin also alerts the hypothalamus to prevent the liver from overproducing glucose. Insulin resistance causes an over-release of fatty acids, a negative condition frequently seen in obesity-related diabetes.

With low levels of insulin, the blood glucose (sugar) level rises or declines beyond the normal range; fluctuating levels are especially common in type 2 diabetes. Without insulin, the body cannot metabolize sugars. Instead of being broken down in cells, the sugar stays in the blood and causes two major problems: it starves cells for energy, possibly damaging them permanently, and can create long-term damage to the eyes (e.g., glaucoma), kidneys, nerve cells, and heart. Untreated high blood glucose levels can eventually cause death.

Risk Factors Who’s Affected?

Only about 5% to 10% of diagnosed diabetes cases are type 1. The disease is usually diagnosed in children and young adults, although it can technically strike at any age. Scientists do not know yet exactly what causes type 1 diabetes but suspect the disease involves a combination of genetic, environmental, and autoimmune factors.

An overweight person who does not exercise is over 30, and/or has close relatives who have type 2 diabetes runs a very high risk of developing type 2 diabetes. Higher-risk ethnic groups include African Americans, Latinos and Hispanics, Native Americans, Alaskan Natives, Asians, and those with Pacific Islander American heritage.

People are more likely to get diabetes if they smoke, have high blood pressure or cholesterol, or, in women, if they had gestational diabetes or gave birth to a baby who weighed more than 9 pounds. A free diabetes risk test is provided by Diabetes.org and only takes a few minutes to complete.

Similarities Type 1 and Type 2 Diabetes

People with type 1 and 2 diabetes experience many of the same symptoms. They also both need to keep close tabs on the amount of sugar in their blood. It’s also very important for people with type 1 and 2 to keep in close contact with a diabetes specialist (endocrinologist). These specialists work with other professionals (diabetes nurse educators, dietitian educators, etc.) to give patients the best care possible. People with diabetes should see their treatment team at least once every three months.

Differences between Type 1 and Type 2 Diabetes

The following table highlights the major differences between Type 1 and Type 2 diabetes −


Type 1 Diabetes

Type 2 Diabetes


Beta cells in the pancreas are being attacked by the body's own cells that therefore can't produce insulin to take sugar out of the bloodstream.

Insulin is not produced.

Diet-related insulin release is so large and frequent that receptor cells have become less sensitive to insulin. This insulin resistance results in less sugar being removed from the blood.


Genetic, environmental and auto-immune factors, idiopathic

Genetic, obesity (central adipose), physical inactivity, high/low birth weight, GDM, poor placental growth, metabolic syndrome.

Warning Signs

Increased thirst & urination, constant hunger, weight loss, blurred vision and extreme tiredness, and glycosuria.

Feeling tired or ill, frequent urination (especially at night), unusual thirst, weight loss, blurred vision, frequent infections, slow wound healing, asymptomatic

Commonly Afflicted Groups


Adults, elderly, certain ethnic groups

Bodily Effects

Believed to be triggered autoimmune destruction of the beta cells; autoimmune attack may occur following a viral infection such as mumps, rubella cytomegalovirus.

Appears to be related to aging, a sedentary lifestyle, and genetic influence, but mostly obesity.

Common physical attributes found

No particular physical attributes correlated with Type 1 diabetes.

Often overweight or obese.


Your body makes too little or no insulin.

Your body can still produce insulin but does not use it properly (insulin resistance).

The estimated percentage of

5% -10% of the people affected by diabetes have Type 1 diabetes.

90% - 95% of total diabetes cases are Type 2 diabetes. In the United States, 37.3 million


people have diabetes (11.3% of the U.S. population).



There is no cure for type 2 diabetes, although sometimes gastric surgery and/or lifestyle/medication treatment can result in remission.

Physical exercise, healthy loss of weight & diet control are advised.


Insulin Injections, dietary plan, regular check-ups of blood sugar levels, daily exercise Goals − optimal glucose, prevent/treat chronic complications, enhance health with food/PA, and individual nutrition needs.

Diet, exercise, weight loss, and in many cases medication. Insulin injections may also be used, SMBG.


There is some scientific evidence that Type 2 diabetes can be reversed with a strict dietary regimen. Specifically, this "Newcastle diet" recommends reducing calorific intake to 800 calories for 8 weeks. Researchers who studied this diet found that Type 2 diabetes is caused by fat clogging up the pancreas, preventing it from producing sufficient insulin to control blood sugar levels. When the body is starved, it uses up this fat in the pancreas.

The daily 800-calorie diet comprises either three 200g liquid food supplements of soups and shakes and 200g of non-starchy vegetables or the tastier 800g equivalent of calorie-shy meals you measure out yourself, plus 2-3 liters of water. After 8 weeks of "starvation," calorific intake can be increased but only to a maximum of two-thirds of the pre-diagnosis level. Ongoing exercise and diet are needed to keep blood glucose levels healthy.