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:

Does food affect your blood test results?

A doctor has provided 1 answer
Dr. Gurmukh Singh answered

Yes: Eating before having blood drawn affects the results of glucose, and lipids among other analytes.

Answered 2/21/2019

5.7k views

Thank

Related Questions

A member asked:

Recently had a lab blood allergy test & lots of foods were highly reactive (<25.00). I was on Prednisone at time. Could this have affected results?

5 doctors weighed in across 3 answers

A member asked:

Today my lactose intolerance breath test of 5 hours result is positive but two years back with my blood test report was positive with food allergy ?

A doctor has provided 1 answer

A member asked:

Food allergy blood testing done. Results say Class III Abnormal - Wheat allergy. I also had a blood test - IgE Gluten- that came back as Class III Abnormal (High) and a test - Celiac (Ab tTG DGP TigA w/Rflx) that is negative. What does this all mean?

A doctor has provided 1 answer

A member asked:

Most food includes B vitamins niacin and riboflavin which are said to cause false interaction with the gFOBT occult tests. How much does it takes of these B vitamins to generate inaccurate results on the gFOBT occult blood stool test? Thank you?

A doctor has provided 1 answer

A member asked:

4 yr son.Had respirtory&food allergy blood tests.results only very low cows milk allergen.Cld it cause stuffy nose&snoring?adenoids&tonsils remvd 2015

A doctor has provided 1 answer

People also searched for:

Have to say love good food and alcohol too,I'm well nourished by my blood test and love my booze too,i got abnormal lived result,not good sober 24/7?
My blood test showed CRP as 0.2 mmole/l. Is this low, normal or high? Would fasting without food or water for about 13 hrs prior affect the results?
Hello, I just found out my blood test has resulted in slightly high blood sugar level. I am a 50 yr old male. What can I do to bring this down naturally? Can certain foods help or particular exercise? I'm trying to avoid diabetes. Thank you?
Can you take Benadryl (diphenhydramine) before a blood tests for IgE antibodies to foods? My son has a test coming up and i wasn't sure if Benadryl (diphenhydramine) would affect the results
My blood sugar test results was169 after food (2hrs) & i pee when ever i drink too much of water.. Is it bad?

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.