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Blutwerte · Marker

Nüchternglukose

Fasting Blood Glucose · Nüchternblutzucker · FBG · Blutzucker

Stoffwechsel & GlukoseNüchtern erforderlichZeitabhängig
Einheit:
mmol/L
Abbreviation
FBG / BG

Fasting Blood Glucose quantifies the concentration of glucose in the blood after a fasting period, reflecting glucose metabolism and insulin function.

Reference Ranges

Reference
3.95.6mmol/L
2.8
3.9
4
5
5.6
13.9
LowNormalHigh
Reference
Optimal
Critical
Unit · mmol/L

Fasting required; values may vary slightly based on lab standards.

Overview

Übersicht

Fasting Blood Glucose (FBG), also known as Nüchternglukose, measures the concentration of glucose in the blood after a period of fasting, typically 8-12 hours. It is a critical biomarker for assessing glucose metabolism and is used to diagnose and monitor diabetes mellitus. Researchers have found that FBG levels reflect the body's ability to maintain glucose homeostasis, which is primarily regulated by insulin. Clinically, FBG is significant in diagnosing diabetes and prediabetes, with elevated levels indicating impaired glucose regulation. It is also used to monitor the effectiveness of diabetes management strategies. Elevated FBG levels are associated with an increased risk of developing diabetes-related complications, such as neuropathy and cardiovascular diseases. In the context of athletic performance and biohacking, maintaining optimal FBG levels is crucial for metabolic efficiency and longevity. Athletes and biohackers often monitor FBG to optimize energy utilization and prevent metabolic disorders. However, FBG levels can be influenced by various factors, including stress, illness, and medication use. Researchers emphasize the importance of fasting before testing to obtain accurate results, as recent food intake can significantly alter glucose levels. Additionally, time-of-day variations and individual metabolic differences can affect FBG readings, necessitating consistent testing conditions for reliable monitoring.

Klinische Bedeutung

Elevated FBG levels indicate impaired glucose regulation, often associated with diabetes and prediabetes. Low FBG levels may suggest hypoglycemia, which can be due to excessive insulin or other metabolic conditions.

Dynamics

Trend Interpretation

Rising Values

Progressively rising FBG suggests worsening glucose control, warranting lifestyle or medication adjustments. Retest in 4 weeks if outside optimal range.

Falling Values

Progressively falling FBG may indicate improved glucose regulation or risk of hypoglycemia.

Re-test Interval

4 weeks if outside optimal range

Etiology

Causes — High & Low

Cause

Elevated Levels

  • Diabetes mellitus
  • Impaired fasting glucose
  • Stress
  • Cushing's syndrome
  • Pancreatitis
Cause

Low Levels

  • Excessive insulin administration
  • Adrenal insufficiency
  • Severe liver disease
  • Alcohol consumption
  • Hypothyroidism
Protocol

How to Optimize

Lever

Lifestyle

  • Regular physical activity
  • Weight management
  • Stress reduction
Lever

Nutrition

  • Low glycemic index foods
  • High fiber diet
  • Balanced macronutrient intake
Lever

Supplementation

  • Chromium
  • Berberine
  • Alpha-lipoic acid

Note:

Consult a healthcare provider before making significant lifestyle changes, especially if on medication.

Testing Guidelines

🍽️Fasting Required
🕐Time-Sensitive

Test in the morning after an overnight fast for consistency.

Testing Frequency

Annually for healthy adults, more frequently if managing diabetes.

Interfering Factors

  • Recent intense exercise
  • Acute illness
  • Medication use

Related Peptides & Hormones

Insulin

Correlated with

hormone

Open Research Questions

Current research suggests that reference ranges and optimal targets for fasting blood glucose (Nüchternglukose) in various populations, particularly in relation to sex-specific differences and confounding factors such as liver dysfunction, remain debated. Researchers have not yet established the precise impact of fasting blood glucose levels on the progression of conditions like hepatogenous diabetes. Additionally, clinical questions regarding the long-term implications of varying fasting glucose levels on neuropathy and cardiovascular risk remain unanswered.

23 Research Publications

1,491

Total Citations

13

Human/RCT

13.2

Avg. Influence

2026

Latest

Sort
Filter
#01

Significance of HbA1c Test in Diagnosis and Prognosis of Diabetic Patients.

ReviewInfluence60.0
1112
Researchers found that glycated hemoglobin (HbA1c) is a reliable biomarker for diagnosing diabetes, reflecting long-term glycemic control. This study highlighted that elevated HbA1c correlates with an increased risk of diabetes complications, including coronary heart disease and stroke.
View on PubMed
#02

Peripheral Neuropathy: Evaluation and Differential Diagnosis.

ReviewInfluence5.0
108
This study examined the prevalence and causes of peripheral neuropathy, highlighting that it affects 1% to 7% of the general population, particularly those over 50. Researchers found that diabetes mellitus is a common identifiable cause, and a comprehensive laboratory evaluation, including fasting blood glucose, is essential for diagnosis.
View on PubMed
#03

Benefits and Adverse Effects of Histidine Supplementation.

ReviewInfluence2.0
93
Researchers reviewed the effects of histidine supplementation, noting improvements in markers of glucose homeostasis, including fasting blood glucose. The study highlights the potential benefits of histidine for metabolic health, though further research is needed.
View on PubMed
#04

Triglyceride-Glucose Index As A Biomarker Of Insulin Resistance, Diabetes Mellitus, Metabolic Syndrome, And Cardiovascular Disease: A Review.

ReviewInfluence7.0
54
This review examined the triglyceride-glucose (TyG) index as a biomarker for insulin resistance and related disorders. Researchers observed that fasting blood glucose is one of the key components used to compute the TyG index, which is linked to cardiovascular disease.
View on PubMed
#05

Optimal serum ferritin level range: iron status measure and inflammatory biomarker.

ReviewInfluence2.0
51
This report discussed the dual role of serum ferritin as both an iron status measure and an inflammatory biomarker. Researchers suggested optimal ferritin levels could improve health outcomes, similar to fasting blood glucose adjustments.
View on PubMed
#06

Fasting blood glucose levels in patients with different types of diseases.

Human
29
Researchers analyzed fasting blood glucose levels across various diseases, finding significantly increased levels in 57 out of 64 conditions, including type 2 diabetes. The study indicates that elevated fasting blood glucose may be a common pathophysiological feature in diseased states.
View on PubMed
#07

Hepatogenous Diabetes: A Primer.

ReviewInfluence3.0
18
This study explored hepatogenous diabetes (HD), which develops in patients with chronic liver disease. Researchers found that HD is associated with impaired glucose tolerance and a higher risk of complications compared to normoglycemic patients.
View on PubMed
#08

Serum sirtuin1: a potential blood biomarker for early diagnosis of Alzheimer's disease.

Human
8
In this study, researchers evaluated serum SIRT1 levels as a potential biomarker for early Alzheimer's diagnosis. They found significantly lower levels in Alzheimer's patients compared to controls, indicating its diagnostic promise.
View on PubMed
#09

Laboratory Evaluation of Spasmodic Dysphonia.

Case Report
6
Researchers evaluated laboratory results in patients with spasmodic dysphonia, finding abnormal levels of fasting blood glucose among other markers. This study suggests that comprehensive laboratory evaluation can aid in diagnosing underlying conditions.
View on PubMed
#10

HbA1c Below the Reportable Range.

Case Report
4
In this case report, researchers observed a 71-year-old female with low HbA1c despite high fasting blood glucose, attributed to hemolysis affecting test results. The findings suggest alternative measures like fructosamine may be beneficial in such cases.
View on PubMed

Publication Trend

Research publications about Nüchternglukose over time

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2
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1
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