Lever
Lifestyle
- Regular exercise
- Stress management
- Adequate hydration
Blutwerte · Marker
Homocystein
Homocysteine · Hcy · tHcy
EntzündungsmarkerNüchtern erforderlich
- Einheit:
- μmol/L
- Abbreviation
- Hcy
Homocysteine levels in the blood, reflecting methionine metabolism and remethylation efficiency.
Reference Ranges
Reference
5–15μmol/L
5
10
15
LowNormalHigh
Reference
Optimal
Unit · μmol/LRanges may vary based on age, sex, and fasting status.
Overview
Übersicht
Homocysteine (Hcy) is a sulfur-containing amino acid derived from methionine metabolism. It serves as an intermediate in the remethylation and trans-sulfuration pathways, playing a crucial role in methyl group transfer and cysteine synthesis. Elevated homocysteine levels, termed hyperhomocysteinemia, are associated with a wide range of conditions, most notably cardiovascular diseases, neural tube defects, and cognitive impairments. Researchers have found that reducing homocysteine levels through B vitamin supplementation can mitigate the risk of these conditions. In the context of athletic performance and biohacking, maintaining optimal homocysteine levels is considered beneficial for cardiovascular health and cognitive function, potentially supporting longevity. However, factors such as vitamin B12 and folate deficiencies, genetic variations, and kidney function can confound homocysteine measurements. Fasting prior to testing is recommended to ensure accurate results, as dietary intake can influence homocysteine levels.
Klinische Bedeutung
Elevated homocysteine levels are clinically significant as they are associated with an increased risk of cardiovascular diseases, cognitive decline, and certain birth defects. Lower levels may be observed in specific conditions such as diabetes without renal complications.
Dynamics
Trend Interpretation
Rising Values
Progressively rising homocysteine levels suggest increased cardiovascular risk and warrant dietary and lifestyle interventions. Retest in 4 weeks if outside optimal range.
Falling Values
Falling levels may indicate improved metabolic health or effective intervention strategies.
Re-test Interval
4 weeks if outside optimal range
Etiology
Causes — High & Low
Cause
Elevated Levels
- Vitamin B12 deficiency
- Folate deficiency
- Renal impairment
- Hypothyroidism
- Genetic mutations (e.g., MTHFR)
Cause
Low Levels
- Improved trans-sulfuration pathway
- Increased BHMT activity
- Type 1 diabetes
- Type 2 diabetes
Protocol
How to Optimize
Lever
Nutrition
- Increase intake of leafy greens
- Consume fortified cereals
- Include legumes in diet
Lever
Supplementation
- Vitamin B12
- Folate
- Betaine
Note:
Consult a healthcare provider before starting any supplementation, especially if you have underlying health conditions.
Testing Guidelines
🍽️Fasting Required
✓Not Time-Sensitive
Draw blood at the same time of day for consistency, as levels may fluctuate.
Testing Frequency
Annually for healthy adults, more frequently if managing cardiovascular risk.
Interfering Factors
- Recent intense exercise
- High protein intake
- Alcohol consumption
Related Peptides & Hormones
Vitamin B12
hormone or peptideMay affect
Open Research Questions
Current research suggests that reference ranges for homocysteine levels and optimal targets for intervention remain debated, particularly regarding the threshold for clinical significance. Researchers have not yet established the precise confounders affecting homocysteine metabolism, such as the interplay between vitamin B12, folate, and genetic factors. Additionally, clinical questions remain unanswered regarding the long-term effects of lowering homocysteine on disease prevention and the specific mechanisms linking hyperhomocysteinemia to various health outcomes.
45 Research Publications
1,459
Total Citations
12
Human/RCT
3.9
Avg. Influence
2025
Latest
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Filter
01Top
#01
Cysteine and homocysteine as biomarker of various diseases.
ReviewInfluence5.0
260
Researchers highlighted the connection between homocysteine and cysteine as biomarkers for various diseases. They found that elevated homocysteine levels are toxic and linked to conditions such as cardiovascular diseases and diabetes.
02Top
#02
Homocysteine - from disease biomarker to disease prevention.
ReviewInfluence16.0
232
Researchers reviewed over 100 diseases associated with high levels of homocysteine, particularly cardiovascular and central nervous system diseases. They found that lowering homocysteine through B vitamin treatment may prevent several conditions, including neural tube defects and cognitive impairment in the elderly. Total homocysteine levels below 10 μmol/L are likely safe, while levels above 11 μmol/L may warrant intervention.
03Top
04
#04
Potential Biomarkers for Post-Stroke Cognitive Impairment: A Systematic Review and Meta-Analysis.
Meta-AnalysisInfluence6.0
121
Researchers conducted a systematic review and meta-analysis to evaluate blood biomarkers for post-stroke cognitive impairment. They found that homocysteine levels were significantly higher in patients with cognitive impairment compared to those without. This suggests that homocysteine may serve as a potential biomarker for assessing cognitive outcomes after stroke.
05
#05
Homocysteine metabolism in diabetes.
ReviewInfluence5.0
105
Researchers studied homocysteine metabolism in diabetes and found that plasma levels were lower in both Type 1 and Type 2 diabetes patients compared to controls. They identified increased activity of specific enzymes as a reason for the reduced homocysteine levels. Insulin and counter-regulatory hormones were shown to influence the regulation of these enzymes.
06
#06
Homocysteine as a Pathological Biomarker for Bone Disease.
Review
86
This article reviewed the role of homocysteine as a risk factor for bone disease. Researchers noted that elevated homocysteine levels could negatively affect bone health and contribute to conditions like osteoporosis, though further investigation is needed.
07
#07
Pseudoexfoliation Syndrome.
UnknownInfluence4.0
56
This study highlighted the association between pseudoexfoliation syndrome and elevated homocysteine levels. Researchers noted that high homocysteine may be linked to systemic diseases affecting the cardiovascular and central nervous systems. The findings suggest a potential biochemical role of homocysteine in this syndrome.
08
#08
Homocysteine and migraine. A narrative review.
ReviewInfluence3.0
52
Researchers reviewed the association between homocysteine levels and migraine. They found that while the link is weak, some studies suggest that lowering homocysteine may reduce migraine frequency and severity. However, the evidence remains inconclusive and requires further investigation.
09
#09
Caspase-3-Responsive Fluorescent/Photoacoustic Imaging of Tumor Apoptosis.
Human
50
This study focused on developing a tumor-targeted probe for imaging apoptosis, specifically targeting caspase-3 activity. While not directly related to homocysteine, it highlights advancements in biomarker research for cancer diagnostics. The probe demonstrated enhanced imaging capabilities in tumor cells.
10
#10
Clinical significance of homocysteine (hcy) on dementia in Parkinson's disease (PD).
UnknownInfluence2.0
36
Researchers assessed the significance of elevated homocysteine (Hcy) levels in Parkinson's disease (PD) patients with dementia. The study found that Hcy levels were higher in PD patients with dementia compared to those without, indicating a potential link to cognitive decline.
Publication Trend
Research publications about Homocystein over time
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