Guide

Ritz crackers can fit as an occasional snack, but they’re low in fiber and easy to overeat, so portion size and pairing make the difference.

Most lipid blood tests don’t require fasting, but a fasting panel may be ordered when triglycerides or follow-up targets need the cleanest read.

Most of the time, you can eat normally before this blood test, yet some lab panels ask for 8–12 hours of fasting for cleaner results.

Many lab orders ask for an 8–12 hour fast, yet some liver panels don’t; the safest move is to follow your order’s prep notes and drink water only.

Most liver ultrasounds need 6–8 hours without food; small sips of water and medicines are usually allowed.

A PSA blood draw typically needs no fasting, yet add-on labs like cholesterol or glucose can mean 8–12 hours with only water.

No, a PSA blood test usually doesn’t need fasting; eat normally unless it’s bundled with other fasting labs.

No, fasting isn’t needed for most TB blood tests; you can eat normally, stay hydrated with water, and follow any lab notes on your order.

No, a potassium-only blood draw usually doesn’t require fasting, but you may be asked to fast when potassium is ordered inside a larger panel.

A TSH blood draw usually doesn’t require fasting, yet test bundles, timing, and a few supplements can change the prep steps.