Preparing

How to prepare.

A few simple steps help your results read accurately. Your lab’s own instructions always come first.

Check whether your test needs a fast

Panels with glucose, insulin or lipids often ask for an overnight fast with water only. A morning draw makes fasting easier.

The night before

  • Fast if your lab asks you to, with water onlyImportant
  • Skip alcoholImportant
  • Get a good night of sleep

The morning of

  • Keep fasting until after the draw if your lab askedImportant
  • Drink water so the draw is easier
  • Ask the lab or your prescriber about your regular medications
  • Skip hard exercise

At the lab, or with your kit

  • Bring a photo ID to QuestImportant
  • Wear a top with easy arm access
  • Follow every step in the kit instructionsImportant

Preparation questions.

Why fast?

Food changes glucose, insulin and lipid levels for several hours, so many panels are read after a fast.

Can I drink water?

Yes. Water keeps you hydrated and makes the draw easier. It does not change these results.

What if I forgot to fast?

Tell the lab before your draw. They can tell you which tests can still run, or you can choose another day.

Should I take my medications?

Ask the lab or the clinician who prescribed them. Some tests are timed around certain medications.

Ready to schedule?

Choose how to test

ScriptsXO organizes and explains your lab results. It does not diagnose, treat or recommend treatment. Talk with your clinician about any result. Results vary.