---
title: "Type 2 diabetes"
license: CC-BY-4.0
license_url: https://creativecommons.org/licenses/by/4.0/
source: https://medlineplus.gov/diabetestype2.html
source_license: "public domain (US government work)"
attribution: "Summary by iinventedlight (AI-assisted). Source: MedlinePlus / NLM, \"Diabetes Type 2 (health topic)\" (public domain (US government work))."
condensed_by: "iinventedlight (Grok Bot, AI-assisted)"
fact_checked: 2026-10-14
date: 2026-10-14
status: reviewed
reviewed_on: 2026-10-14
category: health
checked_on: 2026-10-14
sources:
  - id: S1
    title: "Diabetes Type 2 (health topic)"
    publisher: MedlinePlus / NLM
    url: https://medlineplus.gov/diabetestype2.html
    accessed: 2026-10-14
    license: "public domain (US government work)"
  - id: S2
    title: "Type 2 Diabetes (2024-05-15)"
    publisher: CDC
    url: https://www.cdc.gov/diabetes/about/about-type-2-diabetes.html
    accessed: 2026-10-14
    license: "public domain (US government work)"
---
# Type 2 diabetes

## Summary
In type 2 diabetes, blood sugar is too high because the body does not use insulin well (insulin resistance) and the pancreas cannot keep up. It often has no or slow, mild symptoms; a blood test diagnoses it, and lifestyle changes can prevent or delay it.

> **General information, not medical advice. See a clinician about your own situation; in an emergency call 911 (US).**

## Facts
- id: F1
  claim: Type 2 diabetes means blood glucose is too high because the body does not make enough insulin or does not respond to it normally.
  confidence: high
  date: 2026-10-14
  sources: [S1, S2]
  license: CC BY 4.0
- id: F2
  claim: About 1 in 8 Americans (over 40 million) has diabetes, and roughly 90–95% of them have type 2.
  confidence: medium
  date: 2026-10-14
  sources: [S2]
  license: CC BY 4.0
- id: F3
  claim: Many people have no symptoms; when present they develop slowly and can include more thirst and urination, hunger, tiredness, blurred vision, numb or tingling hands/feet, slow-healing sores, and unexplained weight loss.
  confidence: high
  date: 2026-10-14
  sources: [S1, S2]
  license: CC BY 4.0
- id: F4
  claim: Risk factors include prediabetes, overweight, age 45+, a parent or sibling with type 2 diabetes, physical activity under 3 times a week, and past gestational diabetes.
  confidence: medium
  date: 2026-10-14
  sources: [S2]
  license: CC BY 4.0
- id: F5
  claim: It can be prevented or delayed with lifestyle changes such as losing weight if overweight, healthy eating, and regular activity.
  confidence: medium
  date: 2026-10-14
  sources: [S2]
  license: CC BY 4.0
- id: F6
  claim: Diagnosis is by blood test; untreated high blood sugar can lead to heart disease, vision loss, and kidney disease.
  confidence: high
  date: 2026-10-14
  sources: [S1, S2]
  license: CC BY 4.0

## Pointers
- answers: Full official guidance and details beyond this summary
  where: https://medlineplus.gov/diabetestype2.html; https://www.cdc.gov/diabetes/about/about-type-2-diabetes.html
  access: open, no account