The optimal blood sugar levels for people over 60 years old.

For adults over the age of 60, blood sugar management is not simply a matter of pushing every laboratory result as low as possible.

A glucose reading that is considered normal for diagnosing diabetes is different from a treatment target for an older person already living with the condition. A healthy and active 62-year-old may be able to pursue relatively tight glucose control, while an 82-year-old with heart disease, memory problems and a history of falls may need a less aggressive target.

According to Dr. Armor, this distinction is essential because excessively high blood sugar can damage the body over time, but excessively low blood sugar can create an immediate medical emergency.

“The safest target is not determined by age alone,” Dr. Armor explains. “It depends on whether the person has diabetes, which medicines they use, their overall health, their ability to recognize low blood sugar and how independently they can manage treatment.”

The American Diabetes Association’s 2026 Standards of Care emphasize that glycemic goals should be individualized. Doctors are advised to consider chronic illnesses, cognitive function, physical ability, life expectancy, treatment burden and the risk of hypoglycemia when establishing goals for older adults.

The source material provided for this report also stresses a crucial principle: a lower glucose level achieved through balanced nutrition and physical activity is not necessarily equivalent to the same level produced by an intensive medication regimen. The latter can increase the danger of hypoglycemia, particularly among older adults.

What Do “Normal” Blood Sugar Levels Mean?

For adults who have not been diagnosed with diabetes, the standard diagnostic thresholds do not change simply because a person has turned 60.

A fasting blood glucose test is performed after a person has gone without food overnight. According to the US Centers for Disease Control and Prevention, a fasting result of 99 milligrams per deciliter or lower is classified as normal. A result between 100 and 125 milligrams per deciliter falls within the prediabetes range, while 126 milligrams per deciliter or higher may indicate diabetes when confirmed appropriately.

In millimoles per liter, these values are approximately:

Normal fasting glucose is below 5.6 mmol/L.

Prediabetes is generally between 5.6 and 6.9 mmol/L.

Diabetes may be diagnosed at 7.0 mmol/L or higher, subject to confirmation and clinical circumstances.

Another common test is hemoglobin A1C, which estimates average glucose exposure during the previous two to three months.

An A1C below 5.7 percent is classified as normal. A result from 5.7 to 6.4 percent indicates prediabetes, and an A1C of 6.5 percent or higher meets a diagnostic threshold for diabetes when testing requirements are satisfied.

Dr. Armor cautions that these figures are diagnostic categories, not personalized instructions.

“The border between normal and prediabetes helps doctors classify a patient,” he says. “It does not mean that everyone below that border has exactly the same risk, and it does not mean that every person over it should receive the same treatment.”

Prediabetes is not an emergency, but it is an important warning. It is associated with a greater likelihood of developing type 2 diabetes, cardiovascular disease and stroke.

Age 60 Does Not Create One Universal Target

A common misconception is that every person over 60 should maintain the same fasting glucose or A1C.

In reality, the group described as “over 60” includes people with dramatically different health profiles. A 61-year-old who exercises regularly and takes no glucose-lowering medicine may have very different priorities from a frail person in their late 80s who uses insulin and needs assistance with meals.

For a generally healthy older adult with diabetes, few chronic illnesses and intact physical and cognitive function, an A1C target of approximately below 7.0 to 7.5 percent may be reasonable.

For an older adult with several chronic diseases, mild cognitive impairment or limitations in daily activities, a less stringent target such as below 8 percent may be more appropriate.

For someone with very complex health problems, advanced cognitive impairment, severe frailty or limited life expectancy, clinicians may avoid relying heavily on A1C. The priority becomes preventing symptomatic high glucose while also avoiding hypoglycemia and an excessive treatment burden.

This individualized framework is reflected in the ADA’s 2026 guidance for older adults.

The ADA also notes in its patient guidance that an A1C below 8 percent may be suitable for some older adults because they face a greater risk from low blood sugar and may have other health complications.

“These wider targets are not a sign that doctors have stopped caring about glucose,” Dr. Armor says. “They recognize that the benefits of very tight control may take years to appear, while the harm from a severe low can happen tonight.”

Practical Glucose Targets for Healthy Older Adults With Diabetes

For many nonpregnant adults with diabetes, commonly used general targets include a glucose level of 80 to 130 milligrams per deciliter before meals and below 180 milligrams per deciliter one to two hours after the beginning of a meal. The standard general A1C goal is often below 7 percent, although the ADA explicitly states that the target should be adjusted for age, health, diabetes duration and hypoglycemia risk.

For a healthy older adult, a clinician may therefore consider targets in the following approximate ranges:

A1C below 7.0 to 7.5 percent.

Fasting or premeal glucose between about 80 and 130 milligrams per deciliter, or 4.4 to 7.2 mmol/L.

Bedtime glucose between approximately 80 and 180 milligrams per deciliter, or 4.4 to 10.0 mmol/L.

These are reference ranges rather than personal prescriptions. Kidney disease, heart disease, previous severe hypoglycemia and the medications being used may require different goals.

Targets for Older Adults With More Complex Health Needs

When an older person has multiple serious medical conditions, difficulty completing daily activities or mild to moderate cognitive impairment, a tighter goal may add risk without providing enough additional benefit.

A clinician may consider an A1C target around below 8 percent, with fasting or premeal readings approximately between 90 and 150 milligrams per deciliter. Bedtime readings may be allowed to remain somewhat higher, often around 100 to 180 milligrams per deciliter.

For people in poor health, including those receiving long-term care, those with severe cognitive decline or those with major functional dependence, treatment is usually designed around comfort and safety.

In such cases, a clinician may aim to keep fasting or premeal glucose roughly between 100 and 180 milligrams per deciliter and bedtime glucose around 110 to 200 milligrams per deciliter. The principal objective is to avoid hypoglycemia, dehydration and symptoms caused by very high glucose rather than pursuing a low A1C.

Dr. Armor emphasizes that these ranges must never be used to adjust medication without professional supervision.

“A person using insulin cannot safely copy a target from an online article and change the dose,” he says. “Even a small adjustment can create a serious low, especially when kidney function, appetite or body weight has changed.”

Why Lower Is Not Always Better

For people without diabetes medication, maintaining glucose within a healthy range through food choices, exercise, adequate sleep and weight management is generally beneficial.

The situation becomes more complicated when glucose is forced downward through medications that can produce hypoglycemia.

The ACCORD trial studied more than 10,000 adults with type 2 diabetes who had cardiovascular disease or significant risk factors. The intensive-treatment group pursued an A1C below 6 percent. That part of the trial was stopped early after investigators found increased mortality in the intensive group.

The finding did not prove that naturally lower glucose is dangerous. Instead, it demonstrated that aggressively pursuing near-normal A1C through complicated medication regimens can harm some high-risk people with long-standing type 2 diabetes.

The source material supplied for this article highlights the same lesson, warning that older adults using insulin or sulfonylureas should not chase a lower number without guidance.

“Two people may have the same A1C, but they may have reached it in completely different ways,” Dr. Armor says. “One may have stable glucose because of regular movement and balanced meals. Another may be experiencing repeated hidden lows because the medication dose is too strong.”

Hypoglycemia Is a Major Concern After 60

Blood glucose below 70 milligrams per deciliter is generally considered low.

Symptoms may include shaking, sweating, hunger, dizziness, weakness, confusion, irritability or a rapid heartbeat. Severe hypoglycemia can lead to seizures, loss of consciousness, falls and injury.

Older people may have fewer warning symptoms, delayed recognition or difficulty treating themselves promptly. A low during the night may go unnoticed. Memory problems can lead to repeated doses, missed meals or confusion about insulin.

The risk is particularly important for people taking insulin or medicines called sulfonylureas. Kidney impairment can also cause certain medications to remain in the body longer, increasing the possibility of a low.

Older adults with diabetes are at meaningful risk of falls associated with hypoglycemia, making prevention an important part of treatment planning.

Anyone who experiences repeated glucose readings below 70 milligrams per deciliter should contact their healthcare team. Medication should not be stopped or reduced independently unless emergency instructions have already been provided.

Continuous Glucose Monitoring Is Becoming More Important

A1C provides a useful average, but it cannot reveal every high and low.

Two people can have the same A1C while experiencing very different daily patterns. One may remain relatively stable, while another repeatedly swings from high glucose to dangerous lows.

The ADA’s 2026 revisions recommend continuous glucose monitoring for older adults with type 1 diabetes and for older adults with type 2 diabetes using insulin. The aim is to improve glucose outcomes, reduce hypoglycemia and decrease treatment burden.

A continuous glucose monitor uses a small sensor to estimate glucose throughout the day and night. It can show trends and may provide alarms when glucose is falling or rising.

For older adults, these alarms can be valuable, although the device must be selected with the person’s vision, hearing, manual dexterity, technical comfort and caregiver support in mind.

A1C Is Not Always Reliable in Older People

Although A1C is widely used, it can be misleading in certain medical situations.

Conditions that alter the lifespan or turnover of red blood cells may change the result independently of actual glucose. These include recent blood loss, some forms of anemia, kidney failure, blood transfusion and treatment with erythropoietin.

The ADA’s guidance notes that blood glucose monitoring or continuous glucose monitoring may be more useful for setting goals when red blood cell turnover makes A1C unreliable.

The National Institute on Aging also advises that A1C may not be accurate in people with certain diseases and that additional testing may be needed.

This is another reason that a single laboratory number should not be interpreted without medical context.

How Older Adults Can Improve Glucose Safely

For an older person who is not at risk of hypoglycemia, lifestyle changes can improve insulin sensitivity without the danger associated with aggressively increasing medication.

Dr. Armor recommends focusing first on meal quality.

Carbohydrates do not need to be eliminated, but heavily refined products can cause glucose to rise quickly. Sugary drinks, sweets, sweetened cereals, white bread and many highly processed snacks should be limited.

Vegetables, beans, lentils, minimally processed whole grains and intact sources of fiber are generally absorbed more gradually. Combining carbohydrates with protein, healthy fats and fiber may also reduce rapid postmeal rises.

Physical activity is particularly important after 60 because muscle is a major site for glucose use.

A brief walk after a meal may reduce the postmeal glucose rise. Strength training can help preserve or rebuild muscle, support balance and improve insulin sensitivity.

Exercise plans should be adapted for heart disease, joint problems, fall risk and other limitations. People taking insulin or medicines that cause hypoglycemia may need to check glucose around exercise and discuss medication timing with their clinician.

Adequate sleep also matters because sleep disruption can worsen insulin resistance. Managing sleep apnea, maintaining a regular sleep schedule and addressing nighttime pain or urinary symptoms may indirectly improve glucose control.

The Meaning of “Optimal” After Age 60

The optimal blood sugar level for a person over 60 is not necessarily the lowest number that can be achieved.

For someone without diabetes, the aim is generally to remain below the diagnostic thresholds for prediabetes through sustainable habits and appropriate medical screening.

For a healthy person with diabetes, an A1C around below 7.0 to 7.5 percent may be suitable if it can be reached safely.

For someone with several chronic diseases or functional limitations, a target around below 8 percent may provide a better balance between long-term protection and immediate safety.

For a frail person with complex health needs, avoiding low glucose and symptomatic high glucose may matter more than reaching a specific A1C.

“The correct goal should protect the person, not merely improve the number printed on a laboratory report,” Dr. Armor concludes. “Blood sugar management after 60 must preserve independence, prevent complications and avoid treatment-related harm.”

Anyone over 60 who uses insulin, experiences dizziness or confusion, has repeated low readings or has recently lost weight should arrange a medication review. Changes in appetite, kidney function and daily activity can alter medication needs even when the prescription has remained unchanged for years.

The safest target is therefore one established with a healthcare professional who knows the patient’s medical history, current medication, cognitive status and personal priorities.

The optimal blood sugar levels for people over 60 ...