Treatment for diabetes depends on which type you have, but every form shares the same core goal: keeping blood sugar levels as close to normal as possible to prevent complications. For most non-pregnant adults, that means an A1C below 7%, though your target may be higher or lower depending on your age, overall health, and risk of low blood sugar episodes. The tools to get there range from lifestyle changes and oral medications to insulin therapy and newer drug classes that also protect the heart and kidneys.
Type 1 Diabetes: Insulin Is Essential
Type 1 diabetes is caused by the immune system destroying the cells that produce insulin, so replacing that insulin is the only treatment. The standard approach, called intensive insulin therapy, mimics what a healthy pancreas does by combining two types of insulin. A long-acting insulin taken once or twice a day provides a steady background level. Then a rapid-acting insulin is taken before meals to cover the carbohydrates you eat, with the dose calculated from a personal carb-to-insulin ratio.
If your blood sugar is higher than your target before a meal, you also add a correction dose of rapid-acting insulin. The size of that dose is based on your insulin sensitivity factor, which tells you how much one unit of insulin will lower your blood sugar. These calculations sound complicated at first, but they become routine. Insulin pumps automate much of this by delivering a continuous trickle of rapid-acting insulin throughout the day, with extra doses at mealtimes.
Type 2 Diabetes: Medications and Lifestyle
Type 2 diabetes is treated in layers. The first layer is always lifestyle change: better eating patterns and more physical activity. If that isn’t enough to reach your blood sugar goals, medications are added, and many people eventually use a combination of several.
The most common starting medication works by reducing the amount of sugar your liver releases into the bloodstream, slowing sugar absorption from food, and helping your body use insulin more effectively. It’s typically started at a moderate dose and can be increased up to 2,000 mg per day. It’s been used for decades and remains the foundation of type 2 treatment because it’s effective, inexpensive, and doesn’t cause low blood sugar on its own.
Two newer classes of medication have changed the landscape significantly because they do more than lower blood sugar. One class works by causing the kidneys to flush excess glucose out through urine. In large clinical trials, these drugs reduced the risk of cardiovascular death by up to 38%, cut hospitalizations for heart failure by about 25%, and slowed the progression of chronic kidney disease. They’re now recommended even for people with heart failure who don’t have diabetes at all. The other class mimics a gut hormone that triggers insulin release after eating and suppresses appetite. These medications lower blood pressure, improve cholesterol, promote significant weight loss, and reduce the overall risk of heart attack, stroke, and cardiovascular death. Both classes are increasingly prescribed early in treatment, especially for people who already have heart or kidney problems.
If blood sugar levels still aren’t controlled with these options, insulin can be added to a type 2 regimen as well, usually starting with a single injection of long-acting insulin at bedtime.
The Role of Food and Nutrition
Structured nutrition therapy, ideally guided by a registered dietitian, can lower A1C by up to 2.0 percentage points in type 2 diabetes and up to 1.9 points in type 1. That’s comparable to some medications. No single “diabetes diet” is required. Several eating patterns have evidence behind them, including Mediterranean, vegetarian, and high-fiber approaches. Vegetarian and vegan diets have been shown to reduce A1C by 0.3 to 0.4 percentage points on average, and getting more than 50 grams of fiber per day offers a modest additional benefit.
The practical focus for most people is learning to count carbohydrates, choose foods that don’t spike blood sugar quickly, and eat consistently enough that medication doses work as intended. In type 1 diabetes, carb counting directly determines how much insulin you take at each meal, so it’s a non-negotiable skill.
Exercise as Treatment
Physical activity lowers blood sugar both immediately and over the long term by making your cells more responsive to insulin. The CDC recommends at least 150 minutes per week of moderate-intensity activity, which works out to about 30 minutes on most days. Walking, cycling, swimming, and dancing all count. Resistance training (weights, bands, or bodyweight exercises) adds further benefit by building muscle tissue that absorbs more glucose.
Gestational Diabetes
Diabetes that develops during pregnancy is first treated with lifestyle changes: meal planning and physical activity. For many women, this is enough. The blood sugar targets are tighter than for other forms of diabetes, with fasting glucose below 95 mg/dL, one-hour post-meal readings below 140 mg/dL, and two-hour readings below 120 mg/dL. When diet and exercise can’t keep levels within those ranges, insulin is the recommended medication in the U.S. because it does not cross the placenta. Some oral medications are used in other countries, but they do cross the placenta and may not lower blood sugar sufficiently, so they aren’t considered first-line treatment during pregnancy.
Monitoring With Technology
Continuous glucose monitors have transformed how people track their blood sugar. These small sensors, worn on the arm or abdomen, measure glucose every few minutes and send the data to your phone or a receiver. Instead of relying on a handful of finger-stick readings per day, you get a full picture of how your blood sugar moves throughout the day and night.
A key metric from CGMs is “time in range,” which refers to the percentage of the day your glucose stays within your target zone (typically 70 to 180 mg/dL). Many clinicians now consider time in range a more useful day-to-day measure than A1C alone, because it reveals patterns that A1C, as a three-month average, can mask. You can see exactly how a particular meal, workout, or stressful day affects your blood sugar and adjust in real time.
Personalizing Your A1C Goal
While below 7% is the standard target for most adults, the right goal varies. If you’re otherwise healthy, have had diabetes for a short time, and aren’t on medications that cause low blood sugar, a tighter target of below 6.5% may be appropriate. On the other hand, if you’re older, have other serious health conditions, or experience frequent episodes of low blood sugar, a goal of up to 8% may be safer. The key principle is that treatment shouldn’t create more harm than it prevents. Severe low blood sugar, which can cause confusion, seizures, or loss of consciousness, is an absolute reason to ease up on aggressive glucose-lowering treatment.
Can Type 2 Diabetes Go Into Remission?
Remission is defined as blood sugar returning to levels below the diagnostic threshold (generally an A1C under 6.5%) without any glucose-lowering medication, sustained for at least three months. This is achievable for some people with type 2 diabetes, particularly through significant weight loss early in the course of the disease. Remission doesn’t mean the diabetes is cured. It means the condition is inactive, and it can return, so ongoing monitoring remains important.
Handling Severe Low Blood Sugar
Anyone on insulin, and some people on certain oral medications, should have a plan for severe low blood sugar. If you can still swallow, the treatment is fast-acting sugar: regular soda, fruit juice, or glucose tablets. If you lose consciousness or have a seizure, you should not be given food or drink because of the choking risk. This is where glucagon comes in. It’s available as a nasal spray, a pre-filled auto-injector, or a traditional injection kit. A family member, partner, or close coworker should know where your glucagon is stored and how to use it. After receiving glucagon and regaining consciousness, you should eat a longer-lasting source of carbohydrate and protein, such as crackers with cheese or a sandwich, to keep blood sugar from dropping again.