Diabetes is one of the fastest-growing health concerns in the United States. According to national health estimates, about 97.6 million adults aged 18–64 and another 27.2 million adults aged 65 and older have prediabetes. That means millions of people are living with blood sugar levels that are higher than normal and may progress to diabetes if lifestyle changes are not made.

Understanding the risk factors for diabetes is the first step toward prevention. Some risk factors—like age or genetics—are beyond our control. However, many others are linked to lifestyle choices and can be improved through healthier habits.

In this article, we’ll break down the major modifiable and non-modifiable risk factors for diabetes and explain how you can take proactive steps to reduce your risk and protect your long-term health.

Key Takeaways

• Millions of adults in the United States currently live with prediabetes.
• Some diabetes risk factors cannot be changed, such as age, genetics, or ethnicity.
• Other risk factors—including weight, physical activity, smoking, and blood pressure—can be improved through lifestyle changes.
• Addressing controllable risk factors can significantly lower the chances of developing type 2 diabetes.

Non-Modifiable Risk Factors for Type 2 Diabetes

Certain risk factors increase diabetes risk but cannot be changed. Knowing about them helps people stay vigilant and take preventive steps earlier.

Family History

If a parent or sibling has type 2 diabetes, your risk of developing the condition is higher. Genetics can influence how the body produces and uses insulin, which affects blood sugar control.

Although family history cannot be altered, people with a strong genetic risk can reduce their chances of diabetes by maintaining healthy habits and regular medical checkups.

Race and Ethnicity

Research shows that some racial and ethnic groups in the United States experience higher rates of type 2 diabetes. These groups include:

• African Americans
• Hispanic and Latino Americans
• Native Americans
• Asian Americans
• Pacific Islanders

The increased risk is likely due to a combination of genetic factors, cultural dietary patterns, and socioeconomic influences.

Age

Diabetes risk increases as people get older. After age 45, the likelihood of developing insulin resistance rises.

Age-related factors such as slower metabolism, weight gain, and reduced physical activity can contribute to higher blood sugar levels over time.

History of Gestational Diabetes

Women who develop gestational diabetes during pregnancy have a higher risk of developing type 2 diabetes later in life.

This type of diabetes occurs when pregnancy hormones interfere with the body’s ability to use insulin effectively. Even if blood sugar returns to normal after childbirth, the long-term risk remains higher.

Modifiable Risk Factors for Type 2 Diabetes

The encouraging news is that many diabetes risk factors can be controlled or improved.

Making small but consistent lifestyle changes can dramatically reduce the risk of developing diabetes.

Weight and Obesity

Being overweight—especially carrying excess fat around the abdomen—is one of the strongest risk factors for type 2 diabetes.

Excess body fat can lead to insulin resistance, meaning the body cannot effectively use insulin to regulate blood sugar.

Research shows that losing just 5–10% of body weight can significantly reduce diabetes risk.

Waist circumference is also an important indicator:

• Men: higher risk if waist exceeds 40 inches
• Women: higher risk if waist exceeds 35 inches

Physical Inactivity

A sedentary lifestyle is another major contributor to diabetes.

Regular physical activity improves insulin sensitivity, allowing the body to use glucose more efficiently.

Health experts recommend:

• At least 150 minutes of moderate exercise per week, or
• 75 minutes of vigorous activity weekly

Examples of beneficial activities include:

• brisk walking
• cycling
• swimming
• dancing
• strength training

Exercise also helps maintain a healthy weight and supports heart health.

High Blood Pressure

High blood pressure and diabetes often occur together and significantly increase the risk of heart disease and stroke.

For people with diabetes or prediabetes, experts generally recommend keeping blood pressure below 130/80 mm Hg.

Blood pressure can often be improved through:

• healthier diet choices
• regular exercise
• stress management
• prescribed medications when needed

Smoking

Smoking increases the risk of type 2 diabetes by damaging cells and contributing to insulin resistance.

Chemicals in tobacco can interfere with the body’s ability to regulate blood sugar.

Smoking also worsens complications in people who already have diabetes, increasing the risk of:

• heart disease
• nerve damage
• kidney disease

Quitting smoking is one of the most powerful steps a person can take to improve overall health and reduce diabetes risk.

Risk Factors for Type 2 Diabetes in Children and Teens

Type 2 diabetes is no longer limited to adults. In recent years, more children and teenagers have developed the condition.

Common risk factors in younger individuals include:

• childhood obesity
• family history of diabetes
• sedentary lifestyle
• certain ethnic backgrounds
• prediabetes
• high birth weight or maternal gestational diabetes

Encouraging healthy eating habits and regular physical activity early in life is essential for prevention.

Risk Factors for Type 1 Diabetes

Unlike type 2 diabetes, type 1 diabetes is an autoimmune condition. The immune system mistakenly attacks insulin-producing cells in the pancreas.

The exact cause is still unknown, but some factors may increase risk:

• family history of type 1 diabetes
• genetic predisposition
• environmental triggers such as certain viral infections

Type 1 diabetes most commonly develops in children, teens, and young adults.

Risk Factors for Prediabetes

Prediabetes occurs when blood sugar levels are higher than normal but not yet high enough for a diabetes diagnosis.

Key risk factors include:

• overweight or obesity
• age over 45
• lack of physical activity
• family history of diabetes
• non-alcoholic fatty liver disease
• gestational diabetes history
• belonging to high-risk ethnic groups

Without intervention, many individuals with prediabetes develop type 2 diabetes within several years.

Risk Factors for Gestational Diabetes

Gestational diabetes develops during pregnancy and can affect both the mother and baby.

Factors that increase the risk include:

• previous gestational diabetes
• being overweight before pregnancy
• age over 25
• family history of type 2 diabetes
• polycystic ovary syndrome (PCOS)
• delivering a baby weighing more than 9 pounds

Managing gestational diabetes through healthy eating, exercise, and medical monitoring is essential for a healthy pregnancy.

How to Lower Your Risk of Diabetes

Even if you have certain risk factors, you can still significantly reduce your chances of developing diabetes.

Healthy habits that help prevent diabetes include:

• maintaining a healthy body weight
• staying physically active
• eating a balanced diet rich in whole foods
• limiting processed foods and added sugars
• managing blood pressure and cholesterol
• avoiding tobacco use

Regular health screenings can also help detect prediabetes early, allowing intervention before diabetes develops.

Conclusion

Some diabetes risk factors—such as age, genetics, and ethnicity—cannot be changed. However, many others are directly related to lifestyle choices.

By maintaining a healthy weight, staying active, managing blood pressure, and avoiding smoking, individuals can dramatically lower their risk of developing diabetes.

Taking proactive steps today can help protect long-term health and reduce the growing burden of diabetes in the United States.