Last modified: March 28, 2025
Lab testing instructions
Patients
Overview
Fullscript helps make labs testing a seamless experience. You’ll get clear preparation steps after you order lab testing, so you can plan the best time to complete your test. Have questions about preparing or collecting your sample? Our support team is here to help.
Tip!
After reviewing your preparation instructions, set a reminder — whether it’s on your phone or a sticky note — to help you remember any changes to your routine, like stopping a supplement or fasting.
Finding your testing instructions
You can find your testing instructions in your account by following these steps:
- On the My health page, click the Labs tab.
- Find the test you’d like the instructions for and click View details.
- Scroll to the Preparation instructions drawer and click to open it.
The instructions from the lab company will be in this drawer.
In your treatment plan, your provider may have also added their own personalized message for you based on your medical history.
Specialty lab instructions
If you’ve ordered testing from a specialty lab such as Diagnostic Solutions, Precision Analytical (DUTCH), Genova, 3X4 Genetics, or Doctor’s Data, you’ll be mailed a test kit to your door with it’s own instructions. You’ll receive those instructions both in your Fullscript account and with the test kit.
Your instructions will include everything you need to know to prepare for your test, collect your sample, and send it back to the lab. These can include guidance for:
- How and when to collect your sample
- Fasting requirements
- Foods to avoid
- Fluid intake
- Supplements/medications to pause
Quest Diagnostics instructions
If you’ve ordered blood testing through Quest Diagnostics, you’ll receive a digital requisition form, not a physical test kit. All your instructions will be available in your Fullscript account.
You may need to fast for up to 8 hours before your blood draw. If so, it will be noted in the test instructions.
Tip!
Fasting means you should not eat or drink anything except plain water during that time. If fasting is a challenge, book your blood draw appointment for early in the morning and bring a drink and snack to enjoy afterward.
Avoid waiting until the day of your blood draw appointment to determine if you need to fast. This could lead to rescheduling your appointment or receiving inaccurate results. If you’re unsure if fasting is required, reach out to Fullscript support and we’ll be happy to help you!
Reaching support
Need help with your testing instructions? Our team of labs experts are here to guide you through the process.