A blood sugar reading of 68 mg/dL is technically low. The standard threshold for low blood sugar (hypoglycemia) is below 70 mg/dL, which means 68 falls just under that line. That said, how much it matters depends on whether you have diabetes, what you were doing when you checked, and how you feel.
Where 68 Falls on the Scale
The American Diabetes Association classifies hypoglycemia into three levels. Level 1 covers readings between 54 and 69 mg/dL. Level 2 is anything below 54 mg/dL, which is considered serious. Level 3 is a severe episode where someone needs help from another person, regardless of the exact number. At 68, you’re in the mildest category, just barely below the 70 mg/dL cutoff.
For people with diabetes, a reading of 68 is a signal to act. It’s close enough to normal that it’s not an emergency, but blood sugar can continue dropping if the cause isn’t addressed. Treating it early keeps it from sliding into more dangerous territory.
If You Don’t Have Diabetes
The picture looks different for people without diabetes. A normal fasting blood sugar is generally 70 to 99 mg/dL, but Cleveland Clinic notes that values between 50 and 70 mg/dL can also be normal for people who don’t have diabetes. Your body is quite good at regulating glucose on its own, and brief dips into the upper 60s can happen naturally, especially after exercise, during fasting, or first thing in the morning.
If you saw 68 on a glucose monitor and feel perfectly fine, your body is likely managing the situation without any problem. If you’re consistently seeing numbers in the 60s and experiencing symptoms, that’s worth investigating with a healthcare provider, as it could point to reactive hypoglycemia or another underlying issue.
Symptoms to Watch For
Mild low blood sugar often announces itself before it becomes a problem. Common symptoms at this level include a fast heartbeat, shaking, sweating, sudden hunger, dizziness, and feeling anxious or irritable. Some people also notice difficulty concentrating or a general sense of fogginess.
Not everyone experiences symptoms at 68. Some people feel shaky at 72, while others feel fine at 65. Your personal threshold depends on what your body is used to. People with diabetes who frequently run higher blood sugar levels may start feeling symptoms sooner, while someone whose glucose regularly hovers in the low 70s might not notice a dip to 68 at all.
If blood sugar drops further, below 54 mg/dL, the symptoms become more serious: blurred or double vision, slurred speech, confusion, poor coordination, and in extreme cases, seizures or loss of consciousness. That’s a medical emergency. A reading of 68 is far from that point, but it’s the early warning that tells you to eat something.
What to Do About a Reading of 68
The standard approach is called the 15-15 rule: eat 15 grams of fast-acting carbohydrates, then wait 15 minutes and recheck your blood sugar. Fifteen grams looks like about 4 ounces of juice, 3 to 4 glucose tablets, or a tablespoon of honey. If your number is still below 70 after 15 minutes, repeat the process.
Once your blood sugar is back above 70, follow up with a small meal or snack that includes some protein or fat. This helps stabilize your levels and prevents another dip. A handful of nuts with a piece of fruit, or crackers with peanut butter, works well.
If you don’t have diabetes and simply noticed a reading of 68 on a continuous glucose monitor or a random finger stick, eating a normal meal or snack is usually all you need. Your body’s own glucose regulation will do the rest.
Common Reasons Blood Sugar Drops to the 60s
For people with diabetes, the most common culprits are insulin or certain oral medications. Taking too much, eating less than planned, or exercising more than usual can all push blood sugar below 70. Alcohol also lowers blood sugar, sometimes hours after drinking, because it interferes with the liver’s ability to release stored glucose.
For people without diabetes, a dip to 68 often happens after prolonged fasting, intense physical activity, or as part of reactive hypoglycemia, where blood sugar drops a few hours after a high-carbohydrate meal. The body overproduces insulin in response to the carb load, and glucose overshoots on the way down. This is uncomfortable but not dangerous in most cases.
Why It Matters to Treat It Early
At 68, you’re not in danger. But your brain runs almost entirely on glucose, and it doesn’t store much of its own supply. If blood sugar keeps falling because you skip a meal, keep exercising, or misjudge a medication dose, the consequences escalate quickly. Below 54, the risk of confusion and impaired coordination increases significantly, which makes activities like driving genuinely hazardous. Severe untreated hypoglycemia, though rare, can lead to seizures, loss of consciousness, and in extreme cases, lasting brain damage.
The takeaway at 68 is simple: you’re in the early warning zone, not the danger zone. Eat something, recheck in 15 minutes, and pay attention to what caused the drop so you can prevent it next time.