Get Virtual Care
  • Primary Care
  • Urgent Care
  • FAQs
  • Support Center
For Businesses
  • Direct Primary Care for Organizations
  • For DMEs and Pharmacies
  • For Health Plans
  • For Providers
About Us
  • Who We Are
  • Why HealthTap
  • Our Standards
  • Contact
Log in
Book a video appointment
Book now
  • Get Virtual Care

    • Primary Care
    • Urgent Care
    • FAQs
    • Support Center
  • For Businesses

    • Direct Primary Care for Organizations
    • For DMEs and Pharmacies
    • For Health Plans
    • For Providers
  • About Us

    • Who We Are
    • Why HealthTap
    • Our Standards
    • Contact
Log in to HealthTap
HealthTap Online Primary Care Doctors Accepting New Patients
Book a video visit
HealthTap
Telehealth
A member asked:

When fasting for 12 hrs to do a blood test can u drink water ?

A doctor has provided 1 answer
Dr. Jack Rubin answered

Fasting Blood Test: Yes, you can drink water and eat no food for your test.

Dr Friedlander agreed

Answered 10/21/2020

5.2k views

Thank

Related Questions

A member asked:

Can i drink water if I'm fasting for blood work?

A doctor has provided 1 answer

A member asked:

Is it okay to drink water when fasting for blood work?

A doctor has provided 1 answer

A member asked:

I had lab work done. my blood sugar level can back high. was fasting blood work & didn't drink any water, would that cause the sugar level to be high?

A doctor has provided 1 answer

A member asked:

For fasting bloodwork(hormones)is it okay if I forget to drink a water prior a blood draw that morning?Does not drinking a water affect results?I only took half glass of water 3-4 mins prior to blood draw.Is 3-4 mins enough time for body to hydrate?

2 doctors weighed in across 2 answers

A member asked:

Can a person dilute blood by drinking too much water to actually make their kidney function appear better than it actually is?any more accurate tests

A doctor has provided 1 answer

People also searched for:

Am i allowed to drink water while fasting for a blood sugar test?
When fasting for metabolic blood test can I drink water?
Is it safe to drink water when you are fasting for a glucose blood test?
Doc said to fast 12 hrs for blood tests, is it ok to drink just water if I get thirsty during my fasting? Thanks.
Is it okay if I dont drink a water prior to fasting hormones bloodwork? Would that affect the test results? I only took few sips of water 3-4 mins before a blood draw. I didnt feel dehydrated.had big cup of tea night before, 9 hours prior?

Telemedicine

Primary Care
Manage Your Conditions
Women's Health
Children's Health
Men's Health
Senior Health
Wellness, Prevention & Lifestyle
Sexual Health
Mental & Behavioral Health
Travel Medicine
Urgent Care
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question

More of what we treat

Allergies
Antibiotics
Asthma
High Blood Pressure
Prescriptions
Type 2 Diabetes
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HealthTap
HIPAA logo
HIPAASecure
Soc 2 Type 2 logo
SOC 2 Type 2Certified
JCAHO Accredited
JCAHOAccredited

For Businesses

Direct Primary Care for OrganizationsFor DMEs and PharmaciesFor Health PlansFor Providers

Company

About UsSupport CenterContact Us

Health Content

Health TopicsDoctor Q&A by Specialty

Join Us

For DoctorsJobs
Member App

Download HealthTap

Video visit and message your doctor

Member App QR Code
Play Store Member LinkApp Store Member Link

Questions?

+1 (888) 828-0841support@healthtap.com
LinkedInTwitter
HomeTermsPrivacyCookiesDMCAHealth TopicsDoctors DirectoryDoctor Q&A by Specialty
Copyright 2026 HealthTap, Inc.