Fasting Blood Glucose 117 mg/dL: Is That High?

Is Fasting Blood Glucose 117 mg/dL Low, Normal, or High?

Fasting glucose 117 mg/dL falls in the prediabetes range and is higher than normal. The American Diabetes Association classifies fasting glucose between 100 and 125 mg/dL as prediabetes, also called impaired fasting glucose. This does not mean you have diabetes, but it does mean your body is showing early signs of difficulty managing blood sugar. The encouraging part is that prediabetes is often reversible with the right changes.

A fasting blood glucose reading of 117 mg/dL signals a critical juncture, placing an individual firmly within the prediabetes category. This value, which is 18% above the normal upper limit of 99 mg/dL, indicates that blood sugar levels are consistently higher than healthy but not yet high enough to be diagnosed with type 2 diabetes. At this specific level, common contributing factors often include increasing insulin resistance, where the body's cells don't respond effectively to insulin. This is frequently linked to a sedentary lifestyle, dietary patterns rich in processed foods and added sugars, and accumulating excess body fat, especially around the waistline. While genetics also play a role, lifestyle choices are often highly modifiable. Upon receiving a result like 117 mg/dL, your healthcare provider will typically recommend confirmatory tests, such as another Fasting Blood Glucose measurement, an Oral Glucose Tolerance Test (OGTT), or an HbA1c test, which provides an average blood sugar level over two to three months. What many patients find profoundly encouraging at this stage is the significant power of intervention: prediabetes is often reversible. Consistent, moderate lifestyle adjustments—like incorporating regular physical activity and adopting a balanced diet focused on whole foods—can often normalize blood glucose levels, potentially averting the progression to full-blown type 2 diabetes without the need for medication. This window offers a genuine opportunity for proactive health transformation.

Hidden Risk of Fasting Blood Glucose 117 mg/dL

Fasting glucose of 117 mg/dL might not feel like a big deal because prediabetes rarely causes noticeable symptoms. That is exactly what makes it risky. The CDC estimates that more than 80 percent of people with prediabetes do not know they have it, and without intervention, up to 30 percent will develop type 2 diabetes within five years.

A fasting blood glucose level of 117 mg/dL, while not yet in the diabetic range, signifies impaired glucose metabolism that elevates long-term cardiovascular risk. At this specific level, the body's cells are becoming less responsive to insulin, requiring the pancreas to produce more. This sustained insulin resistance can gradually damage blood vessel linings, promoting the development of atherosclerosis, the hardening and narrowing of arteries. Over time, this significantly increases the likelihood of developing heart disease, stroke, and peripheral artery disease, even before full-blown diabetes is diagnosed. The subtle, chronic inflammation and oxidative stress associated with this degree of hyperglycemia are key contributors to these serious downstream complications.

• Prediabetes damages blood vessels and nerves even before blood sugar reaches the diabetes threshold. The harmful effects start well before diagnosis
• People with prediabetes have a 50 percent higher risk of heart disease and stroke compared to those with normal blood sugar, according to the American Heart Association
• Elevated fasting glucose often occurs alongside other metabolic issues like high blood pressure, high triglycerides, and excess belly fat, a cluster known as metabolic syndrome
• The progression from prediabetes to diabetes is not inevitable. Research from the National Institutes of Health shows that lifestyle changes reduce the risk by 58 percent
• Waiting for symptoms to appear before taking action means losing the window when intervention is most effective

What Does a Fasting Blood Glucose Level of 117 mg/dL Mean?

Glucose is the sugar your body uses as its primary energy source. When you eat, carbohydrates are broken down into glucose and released into your bloodstream. Your pancreas responds by releasing insulin, the hormone that allows glucose to enter your cells. Fasting glucose is measured after 8 or more hours without eating and reflects how well your body manages blood sugar without food coming in.

A fasting blood glucose reading of 117 mg/dL often points to a combination of factors rather than a single cause. A recent high-carbohydrate meal the evening before, especially one rich in refined sugars or starches, is a common dietary culprit that can temporarily elevate fasting levels. More persistently, this value can reflect the early stages of insulin resistance, frequently linked to a sedentary lifestyle and a diet high in processed foods and unhealthy fats. Certain medications, such as corticosteroids or some diuretics, can also interfere with glucose regulation and contribute to this specific reading. Underlying conditions like Polycystic Ovary Syndrome (PCOS) can also manifest with glucose levels in this prediabetic range.

At 117 mg/dL, your fasting glucose is about 13 points above the normal ceiling of 99 mg/dL. What this tells you is that your body is starting to struggle with insulin's job. Either your pancreas is not producing quite enough insulin, or your cells are becoming resistant to the insulin that is there. In most cases of prediabetes, it is insulin resistance. Your cells are not responding to insulin as efficiently as they should, so glucose builds up in the bloodstream instead of moving into cells.

Insulin resistance usually develops gradually over months or years. It is closely tied to carrying excess weight, especially visceral fat around the abdomen. But it can also happen in people who appear lean, particularly if they have a family history of diabetes or lead a sedentary lifestyle.

The body compensates for insulin resistance by producing more insulin. For a while, this keeps blood sugar close to normal. But over time, the pancreas cannot keep up with the increasing demand. That is when fasting glucose starts climbing, first into the prediabetes range and eventually, if nothing changes, into diabetes territory.

Lifestyle Changes for Fasting Blood Glucose 117 mg/dL

Physical activity is the single most powerful tool for reversing prediabetes. The landmark Diabetes Prevention Program study, published by the NIH, showed that 150 minutes of moderate exercise per week reduced the risk of developing diabetes by 58 percent, outperforming medication. Walking briskly for 30 minutes five days a week meets this target.

Given a fasting blood glucose of 117 mg/dL, the immediate next step is to schedule a repeat fasting glucose test within 1-3 months, potentially alongside a Hemoglobin A1c to assess average blood sugar over the past 2-3 months. Prioritize increasing daily physical activity to at least 30 minutes of moderate-intensity exercise most days of the week; walking briskly after meals can be particularly beneficial for improving glucose uptake. Focus on reducing intake of refined carbohydrates and sugary drinks, replacing them with whole grains, lean proteins, and non-starchy vegetables. Tracking your carbohydrate intake and daily activity levels in a journal will provide valuable insights for further lifestyle adjustments and discussions with your healthcare provider.

Weight loss amplifies the effect. Losing just 5 to 7 percent of your body weight, roughly 10 to 14 pounds for someone weighing 200 pounds, significantly improves insulin sensitivity. You do not need to reach an ideal weight. Even modest, sustainable weight loss makes a measurable difference in how your body handles glucose.

Strength training is especially valuable for blood sugar management. Muscle tissue absorbs glucose directly from the bloodstream during exercise and improves insulin sensitivity for hours afterward. Adding two to three sessions of resistance exercise per week, even bodyweight exercises like squats and push-ups, gives your glucose metabolism a meaningful boost.

Sleep quality directly affects insulin resistance. Studies show that sleeping fewer than six hours per night or having disrupted sleep increases the risk of type 2 diabetes independent of other factors. Prioritize seven to nine hours of quality sleep. If you snore heavily or wake up feeling unrested, consider talking to your doctor about sleep apnea, which is both common and treatable.

Chronic stress raises cortisol levels, and cortisol tells your liver to dump more glucose into the bloodstream. Regular stress management, whether through exercise, time outdoors, deep breathing, or social connection, supports better blood sugar regulation.

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