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FSH blood tests usually don’t require fasting, unless your lab pairs it with other blood work that does.

No, fasting isn’t required for a hepatitis C blood test unless your order includes other blood work that asks for fasting.

Fasting depends on the glucose blood test: fasting plasma glucose and an OGTT need 8–12 hours; A1C and random glucose don’t.

No, a CRP blood test rarely needs fasting, unless it’s paired with tests like a lipid panel or fasting glucose.

No, fasting isn’t always required for a hormone blood test, but some hormones need a morning fasting sample for accuracy.

Fasting depends on the exact iron test, but many labs prefer an 8–12 hour fast with a morning draw for steadier iron results.

Yes, most labs want 8–12 hours fasting for a homocysteine blood test; water is fine.

No fasting is needed for an HIV test; eat and drink normally unless your visit includes other fasting blood work.

No, a hepatic function panel usually doesn’t require fasting, but you may be told to fast if it’s ordered with other blood tests.

No, fasting is often not required for a DHEA-S blood test, but follow your lab’s prep note if other bloodwork is bundled with it.