If you’re over 60 and your doctor tells you your blood sugar is “normal,” that word carries a lot of heavy lifting — and it may not mean what you think it means. “Normal” on a blood test is a line drawn for diagnosing diabetes. It was never meant to tell you that your level is optimal or exactly where you want to be. Here’s what historical trials actually show, and why the right goal depends largely on whether or not you take diabetes medication. (Based on opinions by Dr. Alex Webberley)
Key takeaways
- “Normal” blood sugar is a diagnostic threshold, not necessarily an ideal goal — the risk rises steadily even within the normal range, according to the EPIC-Norfolk study.
- A higher normal glucose level has been linked to an increased risk of dementia in older adults who don’t have diabetes, according to a study in the New England Journal of Medicine.
- The landmark ACCORD trial found that dramatically lowering blood sugar with medications in older adults resulted in a 22% increase in mortality due to serious low blood sugar episodes.
- The low number reached through diet and exercise is fundamentally different from the low number reached through medication – the goal should be different depending on what applies to you.
- If you take medication for diabetes, never aim for a lower number on your own — the goal your doctor set was intentionally set to keep you safe.
“Normal” is the threshold, not the goal
when blood sugar When it is measured, doctors usually check your fasting glucose level or HbA1c (your average level over the past three months). The cut-offs used to label results as normal, pre-diabetic or diabetic are useful for diagnosis, but the actual damage caused by glucose does not respect these lines – the relationship is continuous, meaning that the risk creeps up as the average level rises, even when it is still technically within the “normal” range.
A large study in the United Kingdom, called the EPIC-Norfolk trial, tracked thousands of middle-aged and older people, and found a consistent rise in deaths from all causes, especially from heart disease, as HbA1c increased — a rise that was already clearly within the normal range. Being told you’re “normal” is reassuring, but it’s not the same as being told you’re completely innocent.
The link to brain health
A study published in the New England Journal of Medicine followed older adults without diabetes and tracked their glucose levels over several years. Even in this group, those with higher average glucose levels were more likely to develop dementia, and the difference appeared at levels most doctors would describe as normal. Roughly speaking, an average glucose of about 115 mg/dL (US) was associated with a significantly higher risk of dementia than an average of about 100 mg/dL, and diabetes would not be diagnosed. This was observational data, so it cannot be proven that glucose itself is the cause of dementia, but it is consistent with the understanding that higher-than-optimal glucose gradually damages small blood vessels in the brain.
Why does this matter more after 60?
As we age, muscles and other tissues become more damaged Insulin resistanceSo the body has to work harder to keep blood sugar under control, while the insulin-producing cells in the pancreas gradually lose some of their reserves. The result is that many people slowly drift into the high normal range and pre-diabetes after age 60 without ever realizing it. Meanwhile, older blood vessels and an older brain are more vulnerable to damage caused by high glucose through glycation – where sugar attaches to proteins, forming advanced glycation end products that lead to inflammation and atherosclerosis. The same glucose level that may be fairly harmless at 30 can cause more harm at 65.
The crucial development: Medicine changes everything
It might be easy to conclude that everyone over 60 should aim to get their glucose as low as possible – but for people taking diabetes medications, this can actually be dangerous. This is best demonstrated in one of the most important diabetes trials ever conducted: the ACCORD trial.
The researchers followed more than 10,000 people Type 2 diabetes At fairly high cardiovascular risk, average age in the early 60s, I divided them into two groups. One group aimed for a near-normal HbA1c of less than 6% with any combination of medications they were taking; The other was aiming for a more relaxed target of 7-7.9%. The expectation was that the intensively treated group would do better. Instead, the trial was stopped early because that group was 22 percent more likely to die, driven largely by episodes of low blood sugar due to aggressive multidrug therapy, which in older people can lead to falls, heart rhythm problems, and even brain bleeding from falls. That’s why recent guidelines set more relaxed goals (often 7-8.5% HbA1c) for older people taking medications, and why doctors are increasingly trying to reduce the medication rather than adding more.
Reconciliation of results
High blood sugar is associated with premature death, but the group in Accord that achieved low blood sugar also died more often – so how do the two apply? Answer: The low number reached naturally is not the same as the low number reached using medication. When your blood sugar level drops due to diet, movement, and low belly fat, it reflects a healthy, well-functioning system. When it’s low because many medications are pulling it beyond where the body wants it to sit, the benefit of the low number is negated, and then some, by the risk of getting too low. A number on a page can look identical while representing something completely different underneath.
If you are not taking diabetes medications
The encouraging news: The tools to safely lower blood sugar are completely within your control, and none of them carry a real risk of getting too low (except for severe calorie restriction, which most people don’t do).
- What’s on your plate? The biggest lever is getting your carbohydrates mostly from whole, intact foods (vegetables, beans, lentils, whole grains) that are absorbed slowly, while minimizing refined carbohydrates in ultra-processed foods.
- Muscles It is important because it is the main place where reserve glucose is stored and burned. Taking a short walk after meals reduces blood sugar spikes, and regular resistance training builds the muscles’ ability to absorb glucose in the first place.
- He sleeps It’s also important, as even a few bad nights make cells more resistant to insulin.
- Lose some weight around the midsection Improves the entire image.
If you’re not taking diabetes medication, a goal worth aiming for is a fasting glucose level in the low 100s (ideally below about 100 mg/dL) and an HbA1c level comfortably below the pre-diabetic range (about 5.7% below). In general, for this group, lower is better — as long as your body is maintaining it through lifestyle, not medication.
If you take diabetes medications
Your real number is the number your doctor gave you, which is often intentionally higher to protect you from getting too low. Work with your care team, never chase a lower number on your own, and report any episodes of feeling shaky, sweaty, or confused, as these can be signs that your treatment is pushing your levels too low. The broader goal for many people taking medication is to build the lifestyle habits mentioned above alongside treatment, so that over time – with monitoring and medical guidance – the medication may eventually be reduced or, in some cases, stopped entirely under supervision.
Frequently asked questions
If my blood sugar is ‘normal’, should I still worry about it?
It deserves attention, especially after the age of sixty. Research shows that health risks continually rise with your glucose level, even within the range that doctors consider normal — “normal” means you don’t meet the diagnostic criteria for diabetes, not that your level is necessarily optimal.
Should everyone over 60 try to get their blood sugar as low as possible?
No — this depends entirely on whether you are taking diabetes medication. For people who are not taking medication, reduction is generally best when achieved through diet and lifestyle. For people taking medication, aggressively chasing a lower number can be dangerous, as shown in the ACCORD trial.
Why is lowering blood sugar with medications more dangerous than lowering it naturally?
A low amount of diet and movement reflects a healthy, well-functioning system. Being forced to take multiple medications can push their blood sugar too far, potentially triggering dangerous low blood sugar episodes that can cause falls, heart rhythm problems, and other serious complications, especially in older adults.
What should I do if I feel shaky or sweaty while taking diabetes medication?
Tell your doctor – these may be signs that your treatment is pushing your blood sugar too low. Never adjust your medications or goals on your own; Work with your care team.
Quick start checklist
- ☐ Check with your doctor whether your personal goal is different because you are taking the medication
- ☐ If you are not taking medication: Prioritize whole, healthy carbohydrate sources over refined/processed sources
- ☐ Take a short walk after meals to reduce high blood sugar
- ☐ Add regular resistance training to build muscle that stores glucose
- ☐ Prioritize good, consistent sleep
- ☐ If you are taking medication, never seek a lower number without your doctor’s guidance
source: Dr. Alex Webberley
Disclaimer: This article is for educational purposes only and is not personal medical advice. If you take insulin or other diabetes medications, never adjust your goals or medications based on this article — work with your doctor, who knows your complete medical history. If you feel shaky, sweaty, confused, or any other signs of low blood sugar, call your doctor immediately.
