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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 period of fasting.

Reference Ranges

Reference
3.9–5.6mmol/L
2.8
3.9
4
5.2
5.6
13.9
LowNormalHigh
Reference
Optimal
Critical
Unit · mmol/L

Fasting is required for accurate measurement. Slight variations may exist based on age and sex.

Overview

Übersicht

Fasting Blood Glucose (FBG), also known as Nüchternglukose, is a critical biomarker that measures the concentration of glucose in the blood after a period of fasting, typically 8-12 hours. It provides an immediate snapshot of glucose metabolism and is a fundamental test for assessing glycemic control. Researchers have found that FBG is crucial in diagnosing and monitoring diabetes mellitus, a condition characterized by chronic hyperglycemia. Elevated FBG levels are indicative of impaired glucose regulation and are associated with an increased risk of diabetes-related complications, including neuropathy, cardiovascular diseases, and nephropathy. In the context of athletic performance and biohacking, maintaining optimal fasting glucose levels is essential for metabolic efficiency and energy management. Athletes may monitor FBG to optimize carbohydrate intake and insulin sensitivity, which can enhance endurance and recovery. Biohackers often track FBG as part of a broader strategy to improve longevity and prevent metabolic disorders. However, several factors can influence FBG measurements, including stress, illness, and certain medications. It is crucial to conduct the test under standardized conditions, typically in the morning after an overnight fast, to ensure accuracy. Researchers emphasize the importance of considering these confounders when interpreting FBG results to avoid misdiagnosis or unnecessary interventions.

Klinische Bedeutung

Elevated FBG levels suggest impaired glucose metabolism, often indicative of prediabetes or diabetes. Low FBG levels may indicate hypoglycemia, which can be due to excessive insulin or insufficient carbohydrate intake.

Dynamics

Trend Interpretation

Rising Values

Progressively rising FBG suggests worsening glycemic control, potentially indicating the onset of diabetes. Re-test in 4 weeks if values are outside the optimal range.

Falling Values

Falling FBG values may indicate improved insulin sensitivity or potential hypoglycemia if too low.

Re-test Interval

4 weeks if outside optimal range

Etiology

Causes — High & Low

Cause

Elevated Levels

  • Diabetes mellitus
  • Stress
  • Cushing's syndrome
  • Pancreatitis
  • Chronic kidney disease
Cause

Low Levels

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

How to Optimize

Lever

Lifestyle

  • Regular physical activity
  • Stress management techniques
  • Adequate sleep
Lever

Nutrition

  • Low glycemic index foods
  • Balanced macronutrient intake
  • Fiber-rich diet
Lever

Supplementation

  • Chromium
  • Berberine

Note:

Consult a healthcare provider before starting any supplementation, especially if on medication.

Testing Guidelines

🍽️Fasting Required
🕐Time-Sensitive

Conduct test in the morning after an overnight fast for consistency.

Testing Frequency

Annually for healthy adults, more frequently if at risk for diabetes.

Interfering Factors

  • Recent intense exercise
  • Acute illness
  • Corticosteroid use

Related Peptides & Hormones

Insulin

Correlated with

hormone or peptide

Open Research Questions

Current research suggests that reference ranges for fasting blood glucose may vary significantly across different populations, and optimal targets for glycemic control in specific patient groups remain debated. Researchers have not yet established the impact of confounding factors such as age, sex, and ethnicity on fasting blood glucose levels. Additionally, clinical questions regarding the long-term implications of fasting blood glucose variability on diabetes complications and cardiovascular risk remain unanswered.

41 Research Publications

2,137

Total Citations

24

Human/RCT

9.0

Avg. Influence

2026

Latest

Sort
Filter
#01

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

ReviewInfluence74.0
1211
Researchers found that glycated hemoglobin (HbA1c) is a reliable biomarker for diagnosing diabetes, reflecting long-term glycemic control. This study highlights that elevated HbA1c levels correlate with the risk of diabetes complications, including coronary heart disease and stroke.
View on PubMed
#02

Metformin Treatment Was Associated with Decreased Mortality in COVID-19 Patients with Diabetes in a Retrospective Analysis.

HumanInfluence15.0
253
Researchers found that hospitalized COVID-19 patients with diabetes who used metformin had significantly lower in-hospital mortality compared to those who did not. Both groups had similar fasting blood glucose levels at admission, but metformin users maintained effective glucose control. This suggests metformin may provide benefits in managing diabetes during COVID-19.
View on PubMed
#03

Peripheral Neuropathy: Evaluation and Differential Diagnosis.

HumanInfluence6.0
128
This study examined the prevalence and causes of peripheral neuropathy, which affects 1% to 7% of the general population, especially those over 50. Researchers found that diabetes mellitus, nerve compression, and nutritional deficiencies are common causes. Initial laboratory evaluations, including fasting blood glucose, are crucial for diagnosis.
View on PubMed
#04

Benefits and Adverse Effects of Histidine Supplementation.

ReviewInfluence2.0
104
Researchers found that histidine supplementation can improve markers of glucose homeostasis, including fasting blood glucose. The study highlights the need for more research on the effects of histidine intake and its potential benefits for metabolic health.
View on PubMed
#05

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

ReviewInfluence8.0
91
Researchers reviewed the triglyceride-glucose (TyG) index as a biomarker for insulin resistance, highlighting its computation from fasting blood glucose and triglycerides. The study discusses its relevance in assessing metabolic syndrome and cardiovascular disease.
View on PubMed
#06

Lipidomic profiling identifies signatures of metabolic risk.

AnimalInfluence4.0
82
This study identified several lipid biomarkers associated with metabolic traits, including fasting blood glucose. Researchers found that specific lipid species were linked to obesity and dysglycemia, suggesting their potential utility in assessing metabolic risk.
View on PubMed
#07

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

ReviewInfluence2.0
51
This report discussed serum ferritin's dual role as an iron status measure and inflammatory biomarker. Researchers found associations between elevated ferritin levels and increased mortality, suggesting optimal ferritin levels could improve health outcomes.
View on PubMed
#08

Salivary glucose as a non-invasive biomarker of type 2 diabetes mellitus.

HumanInfluence3.0
43
This study examined the potential of salivary glucose as a non-invasive biomarker for diagnosing type 2 diabetes. Researchers found a significant correlation between salivary and blood glucose levels, with salivary glucose showing 88.5% sensitivity. This suggests salivary glucose could be a viable alternative for diabetes screening.
View on PubMed
#09

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 diseases studied. The findings suggest that elevated fasting blood glucose may be a common pathophysiological characteristic of these conditions.
View on PubMed
#10

Edmonton frail score is associated with diabetic control in elderly type 2 diabetic subjects.

HumanInfluence2.0
25
Researchers observed that frail elderly patients with type 2 diabetes had significantly higher fasting blood glucose and HbA1c levels. The study suggests a correlation between frailty and poor glucose control in diabetic subjects.
View on PubMed

Publication Trend

Research publications about Nüchternglukose over time

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