Diabetes 101 — What It Is, Why It Happens, and How It’s Managed

If you’ve ever wondered why your doctor talks about “A1c” or “insulin,” you’re not alone. Diabetes is common—and manageable—with the right tools and habits.

What to know

  • Diabetes is a condition where blood sugar (glucose) stays too high. This happens when your body doesn’t make enough insulin or can’t use it well.
  • There are different types:
    • Type 1: autoimmune—body stops making insulin.
    • Type 2: insulin resistance—body doesn’t use insulin properly; over time the pancreas can’t keep up.
    • Gestational diabetes: develops during pregnancy.
  • You can feel fine and still have high blood sugar. That’s why screening is important.
  • Management is a team effort: healthy eating, physical activity, medications or insulin when needed, and regular monitoring.

Take action

  • Ask about screening if you’re 35+ or have risks (family history, higher weight, inactivity, certain ethnic backgrounds).
  • Learn your numbers:
    • A1c: average blood sugar over ~3 months. Many adults aim for <7% (individual goals vary).
    • Fasting glucose: typically aim 80–130 mg/dL (4.4–7.2 mmol/L) before meals if recommended by your clinician.
    • After-meal glucose: many aim <180 mg/dL (<10.0 mmol/L) 1–2 hours after starting a meal (individual targets vary).
  • Start small with lifestyle:
    • Build half your plate with non-starchy veggies; include lean protein and high‑fiber carbs.
    • Aim for 150 minutes/week of moderate activity plus 2+ days of strength training.
  • Set up your care team: primary care, possibly an endocrinologist, diabetes educator, and dietitian.

Talk to your doctor about

  • Which tests you need and how often (A1c, fasting glucose, cholesterol, kidney labs, eye exams).
  • Personalized glucose targets and whether a glucose meter or CGM is right for you.
  • Medications, side effects, costs, and assistance programs.
  • Vaccinations recommended for people with diabetes.

Quick glossary

  • Glucose: sugar in your blood that fuels your body.
  • Insulin: hormone that helps move glucose into cells.
  • A1c: a lab test showing your average blood sugar over ~3 months.
  • Insulin resistance: when cells don’t respond well to insulin.

Safety note

This article is educational and not a substitute for medical advice. Always follow your clinician’s guidance.

References

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