Trusted-source health topic
Preventive Health
Preventive care aims to reduce health risks and identify selected conditions before complications develop.
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
Laboratory screening is only one part of preventive care. Appropriate tests and timing vary with age, sex, pregnancy status, history, risk factors, and current guidance.
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.
Sources & further reading
- MedlinePlus, U.S. National Library of Medicine: Health Screening
External authoritative patient reference · Verified 2026-08-10
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