Feeling fine isn't the same as being fine
Prediabetes is usually silent. Most people feel normal while their blood sugar slowly rises, which is why about 8 in 10 adults with prediabetes don't know they have it, according to the CDC.
The only way to know for sure is a blood test. Here's how prediabetes is diagnosed, what the numbers mean, and why a full picture matters more than a single result.
Step one: know your risk
Before any blood work, a quick risk check can tell you whether testing makes sense. The CDC's free, one-minute Prediabetes Risk Test looks at your age, family history, blood pressure, activity, and weight.
The U.S. Preventive Services Task Force recommends screening for adults ages 35 to 70 who have overweight or obesity. If you have other risk factors, such as a family history of diabetes, fatty liver, or diabetes during a past pregnancy, ask your doctor about testing too.
The three main blood tests
1. A1C
The A1C test shows your average blood sugar over the past two to three months. If a single blood sugar reading is a snapshot, the A1C is the highlight reel. It doesn't require fasting, which makes it easy to fit into a regular visit.
According to the CDC:
- Normal: below 5.7 percent
- Prediabetes: 5.7 to 6.4 percent
- Diabetes: 6.5 percent or higher
2. Fasting blood sugar
This test measures your blood sugar after you haven't eaten for at least eight hours, usually first thing in the morning.
- Normal: 99 mg/dL or below
- Prediabetes: 100 to 125 mg/dL
- Diabetes: 126 mg/dL or higher
3. Glucose tolerance test
For this test, your blood sugar is checked before and two hours after you drink a sweet liquid. It shows how well your body clears sugar from your blood after a big dose, much like a stress test does for your heart.
- Normal: below 140 mg/dL
- Prediabetes: 140 to 199 mg/dL
- Diabetes: 200 mg/dL or higher
Your doctor will choose the right test for you and may repeat it to confirm the result. A diagnosis should always be made with a healthcare professional.
Why one number isn't the whole story
An A1C result tells you where your blood sugar is today. It doesn't tell you why. Insulin resistance can build for years while blood sugar still looks normal, because your pancreas makes extra insulin to keep up.
That's why a thorough evaluation asks a bigger question: what is changing in your body, what's driving it, and what can we change now?
Other measurements help answer that question:
- Waist size, a simple clue to the deep belly fat around your organs
- Blood pressure
- Triglycerides, a type of fat in your blood linked to insulin resistance
- HDL, the "good" cholesterol that helps clear extra cholesterol from your blood vessels
- Body fat percentage and muscle mass, since muscle is one of the body's biggest users of blood sugar
- Liver health, since fatty liver and insulin resistance often go together
Test again to track your progress
One result is a starting point. Checking your numbers over time shows whether your plan is working. Numbers like A1C, triglycerides, and waist size often improve as habits change, and seeing that progress on paper is a powerful motivator.
Get the full picture
At Health 360 Wellness, a Discovery Visit goes beyond a single lab value. Your plan starts with data: an advanced lab panel, a body composition scan, a measurement of how many calories you burn at rest, and a review with a physician board certified in family medicine and obesity medicine.
Take the CDC's one-minute risk test, then book a $99 Discovery Visit or call (901) 494-6066.
This article is for general health education and does not replace individualized medical evaluation, diagnosis, or treatment.
