Trusted-source health topic
Prediabetes
Prediabetes describes blood glucose levels that are higher than normal but not in the diabetes range.
Why is this important?
Understanding the purpose and limits of laboratory information can support a more informed conversation with a qualified healthcare professional.
How laboratory testing relates
A1C, fasting plasma glucose, or an oral glucose tolerance test may be used in professional evaluation. Different tests do not always identify the same people.
Before testing
Preparation is test-specific. Follow the instructions given for the exact test and contact the laboratory if fasting, timing, medicines, or specimen collection is unclear. Do not stop medicines unless a qualified professional tells you to.
Educationally related laboratory guides
These links explain related laboratory records. They are not recommendations to request or purchase a test.
Sources & further reading
- National Institute of Diabetes and Digestive and Kidney Diseases: Insulin Resistance & Prediabetes
External authoritative patient reference · Verified 2026-08-10
- National Institute of Diabetes and Digestive and Kidney Diseases: Diabetes Tests & Diagnosis
External authoritative patient reference · Verified 2026-08-10
Prefer collection at home?
Request Home Collection and our laboratory team will confirm the requirements and appropriate arrangements.
Request Home Collection