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:

Why did my fasting blood sugar reading go from 80 to 104?

A doctor has provided 1 answer
Dr. Ronald Krauser answered

Not much different: The FBS is not the same every day. It varies day to day so do not worry.

Answered 8/30/2018

5k views

Thank

Related Questions

A member asked:

Is 62 g/dl fasting blood sugar concentration after sleeping 8 hours normal reading?

2 doctors weighed in across 2 answers

A member asked:

I am going to check my lipid profile test. Laboratory says it requires 12hours fasting.Can I perform blood sugar level test with same sample of 12h fasting or I was reading on net 8 hours of fasting is required for glucose level test or must be 8h?

A doctor has provided 1 answer

A member asked:

Can GERD/Anxiety mimic Low Blood Sugar? Have GAD and GERD, get symptoms like LBS, but all tests are between 78 - 120 with a rare low fasting reading.

A doctor has provided 1 answer

A member asked:

Does a single reading of fasting blood sugar of 103mg/dl always means you're prediabetic?Im so worried of having dm type 2.Alot stress before the test

4 doctors weighed in across 2 answers

A member asked:

My fasting blood sugar was 104mg/dl. In a stress and lack of sleep laltely. Does a single reading diagnosis me as prediabetic?Is it certain i will dvlop dm?

4 doctors weighed in across 2 answers

People also searched for:

Is 11 hours fasting fine for fasting blood sugar level test or is too much and will give inaccurate reading or lesser reading?
M58, i got fasting blood sugar reading of 128 after 6 hrs of fast. Would it be same after 8 hrs or would it be less after 8 hrs of fast. ?
Is 12 hours fasting fine for fasting blood sugar test or is it too much and will give lesser or inaccurate readings. ?
My blood sugar level for this two days are high 5.7 mmol and 6.0 mmol fasting. My normal reading for last weeks were 5.4, 4.9, 5.6. Should I worry?
My fasting blood sugar immediately after I woke up was 100 mg/dL. I measured it 10 min later after sipping very little watter (approx 100 ml or 3.3 oz of water) and and the result was 93 mg/dL. Which reading is more accurate?

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.