Preventing diabetes complications comes down to managing a handful of key numbers and habits consistently over time. The most important targets are your blood sugar, blood pressure, and cholesterol, but the details go well beyond that. Daily routines like checking your feet, staying active, and keeping up with screening tests can catch problems early or stop them from developing at all.
Keep Your Blood Sugar in a Safe Range
For most nonpregnant adults with diabetes, an A1C below 7% is the standard target recommended by the American Diabetes Association. A1C reflects your average blood sugar over roughly three months, and staying below that threshold significantly lowers the risk of damage to your eyes, kidneys, and nerves. If you can safely get below 7% without frequent low blood sugar episodes, that’s even better.
Not everyone should aim for the same number. If you’re older, have had diabetes for decades, or have a history of dangerously low blood sugar, a target up to 8% may be more appropriate. The reasoning is straightforward: pushing blood sugar too low can cause fainting, confusion, and falls, and in some cases those risks outweigh the long-term benefits of tighter control. Frequent or severe low blood sugar episodes are a clear signal to adjust your treatment plan and set a higher goal. On the other hand, if you’re younger and otherwise healthy, a more aggressive target may pay off over the years ahead.
Checking your blood sugar regularly, whether with a fingerstick meter or a continuous glucose monitor, helps you spot patterns and make adjustments between lab visits. Your A1C is the big-picture number, but day-to-day monitoring is how you actually steer it.
Protect Your Heart and Blood Vessels
Heart disease and stroke are the leading causes of death for people with diabetes, so managing cardiovascular risk is just as important as managing blood sugar. Two numbers matter most here: blood pressure and LDL cholesterol.
High blood pressure accelerates damage to blood vessels that are already under stress from elevated blood sugar. Keeping it controlled reduces your risk of heart attack, stroke, and kidney disease. For cholesterol, research shows that atherosclerosis (the buildup of plaque in arteries) stops progressing when LDL cholesterol drops below about 70 mg/dL. If you already have heart disease or are at high risk, your doctor will likely aim for that level or lower.
Some newer diabetes medications offer cardiovascular protection beyond blood sugar control. One class helps lower the risk of heart failure and reduces pressure inside the kidneys, while another class is particularly effective at preventing heart attacks and strokes in people with existing artery disease. These medications work through different mechanisms, so your doctor may recommend one or both depending on your specific risk profile. Ask whether your current treatment plan includes this kind of organ protection, especially if you have any history of heart or kidney problems.
Get 150 Minutes of Activity Each Week
The CDC recommends at least 150 minutes per week of moderate-intensity physical activity for people with diabetes. That breaks down to about 30 minutes on most days. Walking briskly, cycling, swimming, or anything that gets your heart rate up without leaving you breathless all counts. Strength training two or three times a week adds another layer of benefit by improving how your muscles use insulin.
Exercise lowers blood sugar directly by pulling glucose into working muscles, and it improves insulin sensitivity for hours afterward. Over time, regular activity lowers A1C, blood pressure, and cholesterol, hitting multiple complication risk factors at once. You don’t need to do all 30 minutes in a single session. Even 10-minute walks after meals can meaningfully reduce blood sugar spikes.
Eat to Lower Blood Sugar and Blood Pressure
No single “diabetes diet” exists, but certain eating patterns have strong evidence behind them. The DASH diet, which emphasizes vegetables, fruits, low-fat dairy, whole grains, poultry, fish, and nuts while limiting red meat, sweets, and sugary drinks, has been shown to lower blood pressure, support weight loss, and reduce diabetes risk itself. The Mediterranean diet, which shares many of the same principles with an emphasis on olive oil and fatty fish, has similar benefits.
The common thread is replacing processed foods and refined carbohydrates with whole, fiber-rich options. Fiber slows the absorption of sugar into your bloodstream, smoothing out the spikes that cause long-term damage. Reducing sodium intake helps with blood pressure. You don’t need to overhaul everything overnight. Swapping one meal a day toward these patterns and building from there is a practical starting point.
Check Your Feet Every Day
Diabetic nerve damage often starts in the feet, and because it reduces sensation, you can develop a sore or infection without feeling it. The CDC recommends checking your feet daily for cuts, redness, swelling, sores, blisters, corns, and calluses. Look at the tops, bottoms, and between your toes. Use a mirror or ask someone for help if you can’t see the bottoms easily.
Beyond daily self-checks, have your feet examined at every healthcare visit and see a foot specialist at least once a year. A professional exam includes testing with a thin filament pressed against the sole of your foot to check for loss of sensation. Catching neuropathy early gives you the chance to tighten blood sugar control before the damage progresses to ulcers or, in severe cases, amputation. Wearing well-fitting shoes, keeping your feet clean and moisturized (but not between the toes, where moisture breeds infection), and never walking barefoot are simple habits that prevent a lot of problems.
Screen Your Eyes Annually
Diabetes can damage the tiny blood vessels in the retina, the light-sensitive tissue at the back of your eye. This process, called diabetic retinopathy, often causes no symptoms until vision loss has already begun. That’s why regular dilated eye exams are essential.
For people with type 1 diabetes, annual dilated eye exams should begin five years after diagnosis. For type 2 diabetes, screening should start at the time of diagnosis since the disease may have been present for years before it was caught. If your eyes are healthy and blood sugar is well controlled, some evidence suggests that screening intervals can be safely stretched to every two to four years. But if any early signs of retinopathy appear, the schedule tightens dramatically, sometimes to every three to six months. Early detection and treatment can prevent most diabetes-related vision loss.
Monitor Your Kidneys Every Year
Diabetes is the most common cause of kidney failure, but kidney damage is highly preventable when caught early. Two simple tests track your kidney health. The first is a urine test called UACR (urine albumin-to-creatinine ratio), which detects tiny amounts of protein leaking into your urine, an early sign of kidney damage. The second is a blood test that estimates how well your kidneys are filtering waste, known as eGFR.
Both tests should be done at least once a year for anyone with type 2 diabetes and for anyone who has had type 1 diabetes for five years or more. If results start to shift, testing becomes more frequent. The reason these screenings matter so much is that kidney damage from diabetes is silent for years. By the time you notice symptoms like swelling or fatigue, significant damage has already occurred. Keeping blood sugar and blood pressure under control are the two most effective ways to protect your kidneys, and certain diabetes medications now offer additional kidney protection by reducing pressure inside the kidneys and slowing the progression of disease.
Stay Up to Date on Vaccinations
Diabetes weakens parts of the immune system, making infections harder to fight and more likely to destabilize blood sugar. The CDC specifically recommends annual flu shots for people with diabetes because flu complications, including pneumonia and hospitalization, are significantly more common in this group. If you have diabetes, choose an injectable flu vaccine rather than the nasal spray version, which contains a live virus.
Pneumococcal vaccination is also important. Having the flu increases your risk of developing pneumococcal pneumonia, and diabetes independently raises that risk further. Staying current on both vaccines creates a meaningful layer of protection against infections that can spiral into serious blood sugar crises and hospitalizations.
Put It All Together With Regular Checkups
None of these strategies works in isolation. The people who avoid diabetes complications long-term are the ones who treat it as a system: blood sugar, blood pressure, cholesterol, screenings, daily habits, and medications all working together. A practical approach is to use each doctor’s visit as a checkpoint. Know your A1C, blood pressure, and cholesterol numbers. Ask whether your kidney and eye screenings are on schedule. Review your medications to make sure they’re still the right fit as your health evolves.
Small, consistent actions compound over years. Checking your feet takes 30 seconds. A post-dinner walk takes 15 minutes. An annual eye exam takes an hour. These are not dramatic interventions, but they are the ones that prevent the serious complications most people fear when they hear the word diabetes.