Hemoglobin A1c 6.8 %: Is That High?

Is Hemoglobin A1c 6.8 % Low, Normal, or High?

HbA1c 6.8% is considered high and indicates that blood sugar has been poorly controlled over the past two to three months. The American Diabetes Association defines diabetes as HbA1c of 6.5 percent or above, and at 6.8% your average blood sugar has been significantly elevated. This result needs medical attention, but the important thing to know is that HbA1c can be brought down with the right combination of treatment and lifestyle changes.

An A1c of 6.8% directly indicates a diagnosis of diabetes, reflecting an average blood glucose level significantly above the normal reference range of 4.0-5.6% over the past two to three months. At this specific level, the elevation in blood sugar is most commonly due to either insulin resistance, where the body’s cells do not effectively respond to the insulin produced, or insufficient insulin production by the pancreas to manage glucose loads. Following this result, your healthcare provider will likely recommend confirmatory tests such as a fasting plasma glucose or an oral glucose tolerance test to solidify the diagnosis. Beyond confirmation, typical follow-ups involve assessing for early signs of complications through tests like a lipid panel and a kidney function assessment, including a urine microalbumin check. A crucial detail for patients at this juncture is that while 6.8% signifies diabetes, it often represents an early stage where early and aggressive lifestyle modifications—such as dietary changes prioritizing whole, unprocessed foods and consistent physical activity—can profoundly improve blood sugar control, potentially leading to remission in some cases or significantly delaying the progression and onset of associated complications.

Hidden Risk of Hemoglobin A1c 6.8 %

An HbA1c of 6.8% often does not cause dramatic symptoms day to day, which makes it easy to underestimate how much damage elevated blood sugar is doing over time. High glucose works quietly, and complications develop gradually before becoming obvious. The ADA stresses that bringing HbA1c closer to target significantly reduces the risk of long-term complications.

A Hemoglobin A1c of 6.8% indicates consistently elevated blood glucose levels over the past 2-3 months, placing you in the prediabetes or early diabetes range. This sustained hyperglycemia can begin to damage small blood vessels, increasing the long-term risk for microvascular complications such as retinopathy (eye damage leading to vision loss), nephropathy (kidney damage potentially leading to kidney failure), and neuropathy (nerve damage causing pain, numbness, or weakness, particularly in the extremities). While not yet in the severe diabetes range, this level signifies a metabolic state where these damaging processes are actively underway, necessitating intervention to prevent further progression.

• Every 1 percent reduction in HbA1c reduces the risk of microvascular complications (eye, kidney, nerve damage) by approximately 37 percent according to the landmark UKPDS study
• Persistent high blood sugar damages small blood vessels in the eyes, potentially leading to diabetic retinopathy, the leading cause of vision loss in working-age adults
• Nerve damage (neuropathy) that starts as tingling or numbness in the feet affects about half of all people with diabetes and worsens with prolonged elevated glucose
• Kidney disease risk increases significantly when HbA1c stays above target. The National Kidney Foundation reports that diabetes is the leading cause of kidney failure
• Heart disease and stroke risk are two to four times higher with diabetes, and poor glucose control amplifies this risk further

What Does a Hemoglobin A1c Level of 6.8 % Mean?

HbA1c measures how much glucose has bonded to the hemoglobin in your red blood cells over the past two to three months. Since red blood cells live about 90 to 120 days, this test captures a rolling average rather than a single moment.

A Hemoglobin A1c result of 6.8% typically points to a combination of factors contributing to sustained high blood sugar. Most commonly, this is driven by a diet persistently high in refined carbohydrates and sugars, coupled with insufficient physical activity leading to reduced insulin sensitivity. In some individuals, this level might also reflect early stages of pancreatic beta-cell dysfunction where insulin production is starting to lag behind the body's needs, or it could be exacerbated by certain medications like steroids or diuretics that can raise blood glucose. Recent significant weight gain can also contribute significantly to this reading.

At 6.8%, your estimated average blood sugar has been roughly 183 mg/dL. To put that in context, the ADA target for most adults with diabetes is an HbA1c below 7.0 percent, which corresponds to an average blood sugar around 154 mg/dL. Your reading is about one full percentage point above that target.

What this tells you is that your body is not managing glucose effectively enough with your current treatment plan. Either you are producing too little insulin, your cells are highly resistant to the insulin being produced, or both. In type 2 diabetes, insulin resistance is usually the primary driver, often worsened by excess weight, inactivity, and dietary patterns. In type 1 diabetes, the issue is insufficient insulin production.

An HbA1c of 6.8% means that glucose has been spending too much time circulating in your blood at elevated levels. Over months and years, this excess glucose damages blood vessels and nerves throughout the body. The relationship between HbA1c and complications is well established: the higher and longer blood sugar stays elevated, the greater the risk.

Lifestyle Changes for Hemoglobin A1c 6.8 %

Lifestyle changes are essential for bringing HbA1c down from 6.8%, and they work alongside medication rather than replacing it. Exercise directly lowers blood sugar by moving glucose from the bloodstream into working muscles, and this effect persists for hours after the workout ends.

With a Hemoglobin A1c of 6.8%, immediate and focused lifestyle modifications are critical. Prioritize reducing intake of sugary drinks and refined grains, replacing them with whole grains, lean proteins, and plenty of non-starchy vegetables to create a more stable blood glucose environment. Aim for at least 150 minutes of moderate-intensity aerobic exercise per week, such as brisk walking or cycling, alongside strength training. Schedule a follow-up test in three months to assess the impact of these changes. Consider consulting a registered dietitian for personalized meal planning and discussing this result with your primary care physician to rule out other contributing health conditions.

The ADA recommends at least 150 minutes of moderate aerobic exercise per week. Walking, cycling, swimming, or any activity that raises your heart rate counts. Start where you are. If you are currently inactive, begin with 10-minute walks after meals and build gradually. Post-meal walking is particularly effective because it blunts the blood sugar spike that follows eating.

Weight management has a major impact on insulin resistance. Losing 5 to 10 percent of your body weight can meaningfully improve how your cells respond to insulin and lower HbA1c by 0.5 to 1.0 percentage points. For someone weighing 200 pounds, that is 10 to 20 pounds.

Strength training is valuable because muscle tissue actively absorbs glucose. Building muscle through resistance exercise gives your body more capacity to clear glucose from the blood. Two to three sessions per week complement aerobic exercise.

If you smoke, quitting is critical. Smoking increases insulin resistance, raises blood sugar, and accelerates every vascular complication that diabetes can cause. Sleep and stress management also matter. Poor sleep impairs insulin sensitivity, and chronic stress raises cortisol, which pushes blood sugar higher.

Written by

Ernestas K.

Clinical research writer specializing in human health, biology, and preventive medicine.

Reviewed against ADA, CDC, NIH, WHO, Mayo Clinic guidelines · Last reviewed March 20, 2026