Diabetes is widely classified as a modifiable risk factor for cardiovascular disease and other serious health conditions. Type 2 diabetes can often be prevented, delayed, or even put into remission through lifestyle changes and medication. Type 1 diabetes cannot be prevented, but its downstream risks can be significantly reduced through blood sugar management. So the short answer is yes, but the full picture depends on which type of diabetes you’re talking about and what exactly you mean by “modify.”
What “Modifiable” Actually Means Here
In medical risk assessment, a modifiable risk factor is one you can change or control, as opposed to non-modifiable factors like age, sex, or family history. Diabetes lands in the modifiable category because the damage it causes, primarily through elevated blood sugar, responds to intervention. You can lower blood sugar through diet, exercise, weight loss, and medication, and doing so meaningfully reduces your risk of heart attack, stroke, kidney disease, nerve damage, and vision loss.
This is different from saying diabetes is easy to reverse or that everyone has equal control over it. The label “modifiable” simply means the risk isn’t fixed. It can move in either direction depending on what you do.
Type 2 Diabetes: Prevention and Remission
Type 2 diabetes is the most clearly modifiable form. The landmark Diabetes Prevention Program trial found that losing 5 to 7 percent of body weight through calorie reduction and 150 minutes of weekly physical activity cut the risk of developing type 2 diabetes by 58 percent. For adults over 60, the reduction was even larger: 71 percent. And these benefits lasted. After 15 years of follow-up, participants in the lifestyle intervention group still had a 27 percent lower incidence of diabetes compared to those who received standard advice alone.
For people who already have type 2 diabetes, remission is possible. An international expert panel convened by the American Diabetes Association defined remission as maintaining an HbA1c (a measure of average blood sugar over two to three months) below 6.5 percent for at least three months without taking any glucose-lowering medication. This typically requires sustained weight loss, and not everyone achieves it, but the fact that it’s possible at all reinforces the modifiable nature of the condition.
Over 10 years in the prevention trial, people who stuck with the lifestyle program had a cumulative diabetes incidence of 26.5 percent, compared to 52.4 percent in the group that received only standard recommendations. That’s roughly half the risk, achieved without any medication at all.
Type 1 Diabetes: The Disease Isn’t Modifiable, but the Risk Is
Type 1 diabetes is an autoimmune condition. You can’t prevent it, and you can’t put it into remission. In that sense, developing type 1 diabetes is a non-modifiable event. But the cardiovascular and organ damage that diabetes causes? That part responds powerfully to how well blood sugar is controlled.
The Diabetes Control and Complications Trial showed that intensive blood sugar management reduced the risk of retinopathy, nephropathy, and neuropathy by 35 to 90 percent compared to conventional treatment. A large registry study published in the New England Journal of Medicine found a steep, dose-like relationship between HbA1c and death in type 1 diabetes. People with an HbA1c at or below 6.9 percent had roughly twice the risk of cardiovascular death compared to people without diabetes. But at an HbA1c of 9.7 percent or higher, that risk jumped to more than 10 times the rate of matched controls. The gap between those two numbers represents modifiable risk.
So while you can’t modify whether you have type 1 diabetes, you can substantially modify how much danger it poses.
How High Blood Sugar Causes Damage
Understanding why diabetes is a risk factor in the first place helps explain why controlling it matters so much. Elevated glucose directly injures the inner lining of blood vessels. It chemically alters LDL cholesterol and clotting factors in ways that accelerate plaque buildup. It increases oxidative stress, which is a form of cellular damage caused by unstable molecules. Over time, these processes stiffen and narrow arteries, raising the risk of heart attacks and strokes.
Even in people without a diabetes diagnosis, blood sugar levels in the upper-normal range carry measurable risk. Compared to an HbA1c of 5.0 to 5.4 percent, levels of 6.0 to 6.4 percent (still technically below the diabetes threshold) were associated with a 59 percent higher risk of cardiovascular events and a 35 percent higher risk of death. This gradient means that lowering blood sugar at almost any point on the spectrum can reduce risk.
Medications That Go Beyond Blood Sugar
Newer classes of diabetes drugs have changed the conversation about risk modification. A class of medications originally developed for blood sugar control, known as GLP-1 receptor agonists, has shown cardiovascular benefits that go well beyond glucose lowering. These drugs reduce inflammation, decrease harmful fat deposits around the heart and blood vessels, lower blood pressure, and improve the function of blood vessel walls.
Clinical trial data shows that these cardiovascular benefits persist even in people without diabetes, suggesting the drugs work through mechanisms that are independent of blood sugar control alone. They reduce rates of heart attack, stroke, and hospitalization for heart failure across a wide range of patients regardless of age, sex, or body weight. When combined with another class of diabetes medication that works by helping the kidneys remove excess sugar and fluid, the protective effects appear to be even greater.
This matters for the modifiability question because it means treating diabetes now involves tools that don’t just lower a number on a lab test. They actively counteract the biological processes through which diabetes damages the cardiovascular system.
Screening Catches Risk Early
The U.S. Preventive Services Task Force recommends screening for prediabetes and type 2 diabetes in adults aged 35 to 70 who have a BMI of 25 or higher. For Asian American individuals, screening is recommended at a BMI of 23 or higher, because diabetes risk rises at lower body weights in this population. Screening should also begin earlier for American Indian, Alaska Native, Black, Hispanic, and Native Hawaiian or Pacific Islander adults, who develop diabetes at disproportionately high rates.
Catching prediabetes early is where the biggest modification opportunity lies. At that stage, the CDC estimates that lifestyle changes can cut the risk of progressing to type 2 diabetes in half. Once diabetes is established, it’s still modifiable, but preventing it in the first place is far more effective than managing it after the fact.
The Cost of Not Modifying It
Lifestyle intervention isn’t just clinically effective. It’s cost-effective. Over 10 years in the Diabetes Prevention Program, people who followed the lifestyle program spent about $4,250 less in non-intervention medical costs than those who didn’t, largely because they avoided the expensive complications of diabetes. From a health system perspective, lifestyle intervention cost roughly $10,000 to $20,000 per additional year of perfect health gained, well within the range that health economists consider a good value. Metformin, a common and inexpensive medication used in prediabetes, was actually cost-saving compared to doing nothing.
These numbers reinforce a practical point: modifying diabetes risk isn’t just theoretically possible. It pays for itself in reduced complications, lower medical bills, and longer, healthier life.